./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 35987657 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-?-3598765 [2022-07-21 17:20:18,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 17:20:18,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 17:20:18,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 17:20:18,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 17:20:18,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 17:20:18,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 17:20:18,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 17:20:18,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 17:20:18,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 17:20:18,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 17:20:18,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 17:20:18,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 17:20:18,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 17:20:18,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 17:20:18,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 17:20:18,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 17:20:18,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 17:20:18,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 17:20:18,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 17:20:18,465 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 17:20:18,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 17:20:18,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 17:20:18,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 17:20:18,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 17:20:18,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 17:20:18,476 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 17:20:18,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 17:20:18,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 17:20:18,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 17:20:18,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 17:20:18,478 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 17:20:18,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 17:20:18,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 17:20:18,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 17:20:18,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 17:20:18,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 17:20:18,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 17:20:18,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 17:20:18,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 17:20:18,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 17:20:18,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 17:20:18,493 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 17:20:18,523 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 17:20:18,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 17:20:18,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 17:20:18,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 17:20:18,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 17:20:18,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 17:20:18,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 17:20:18,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 17:20:18,526 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 17:20:18,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 17:20:18,527 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 17:20:18,527 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 17:20:18,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 17:20:18,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 17:20:18,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 17:20:18,528 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 17:20:18,528 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 17:20:18,528 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 17:20:18,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 17:20:18,529 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 17:20:18,529 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 17:20:18,529 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 17:20:18,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 17:20:18,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 17:20:18,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 17:20:18,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:20:18,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 17:20:18,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 17:20:18,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 17:20:18,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 17:20:18,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2022-07-21 17:20:18,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 17:20:18,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 17:20:18,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 17:20:18,888 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 17:20:18,888 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 17:20:18,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2022-07-21 17:20:18,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a7967c14/1e08cc0e8a36497f8d569e9b94c8d488/FLAGe58bf5f6b [2022-07-21 17:20:19,323 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 17:20:19,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2022-07-21 17:20:19,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a7967c14/1e08cc0e8a36497f8d569e9b94c8d488/FLAGe58bf5f6b [2022-07-21 17:20:19,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a7967c14/1e08cc0e8a36497f8d569e9b94c8d488 [2022-07-21 17:20:19,349 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 17:20:19,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 17:20:19,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 17:20:19,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 17:20:19,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 17:20:19,356 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb380d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19, skipping insertion in model container [2022-07-21 17:20:19,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 17:20:19,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 17:20:19,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:20:19,519 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 17:20:19,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 17:20:19,568 INFO L208 MainTranslator]: Completed translation [2022-07-21 17:20:19,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19 WrapperNode [2022-07-21 17:20:19,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 17:20:19,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 17:20:19,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 17:20:19,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 17:20:19,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,620 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-07-21 17:20:19,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 17:20:19,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 17:20:19,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 17:20:19,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 17:20:19,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,634 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 17:20:19,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 17:20:19,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 17:20:19,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 17:20:19,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (1/1) ... [2022-07-21 17:20:19,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 17:20:19,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:19,684 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) [2022-07-21 17:20:19,712 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 [2022-07-21 17:20:19,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 17:20:19,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 17:20:19,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 17:20:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 17:20:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 17:20:19,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 17:20:19,802 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 17:20:19,803 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 17:20:19,928 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 17:20:19,933 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 17:20:19,933 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 17:20:19,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:20:19 BoogieIcfgContainer [2022-07-21 17:20:19,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 17:20:19,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 17:20:19,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 17:20:19,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 17:20:19,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:20:19" (1/3) ... [2022-07-21 17:20:19,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713ec67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:20:19, skipping insertion in model container [2022-07-21 17:20:19,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:20:19" (2/3) ... [2022-07-21 17:20:19,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713ec67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:20:19, skipping insertion in model container [2022-07-21 17:20:19,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:20:19" (3/3) ... [2022-07-21 17:20:19,944 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2022-07-21 17:20:19,962 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 17:20:19,962 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-07-21 17:20:20,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 17:20:20,025 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@61812ea, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3678fa24 [2022-07-21 17:20:20,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-21 17:20:20,030 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) [2022-07-21 17:20:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-21 17:20:20,038 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:20,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-21 17:20:20,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:20,045 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-07-21 17:20:20,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:20,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177896384] [2022-07-21 17:20:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:20,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:20,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:20,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177896384] [2022-07-21 17:20:20,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177896384] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:20,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:20,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 17:20:20,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379982730] [2022-07-21 17:20:20,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:20,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:20:20,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:20,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:20:20,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:20:20,313 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) [2022-07-21 17:20:20,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:20,375 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-07-21 17:20:20,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:20:20,379 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 [2022-07-21 17:20:20,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:20,385 INFO L225 Difference]: With dead ends: 59 [2022-07-21 17:20:20,385 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 17:20:20,388 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:20:20,393 INFO L413 NwaCegarLoop]: 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 [2022-07-21 17:20:20,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:20,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 17:20:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-07-21 17:20:20,424 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) [2022-07-21 17:20:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-07-21 17:20:20,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-07-21 17:20:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:20,427 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-07-21 17:20:20,427 INFO L496 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) [2022-07-21 17:20:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-07-21 17:20:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:20:20,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:20,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:20:20,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 17:20:20,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:20,430 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-07-21 17:20:20,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:20,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043529982] [2022-07-21 17:20:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:20,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:20,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:20,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043529982] [2022-07-21 17:20:20,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043529982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:20,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:20,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:20:20,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140385697] [2022-07-21 17:20:20,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:20,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 17:20:20,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:20,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 17:20:20,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 17:20:20,496 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) [2022-07-21 17:20:20,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:20,538 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-07-21 17:20:20,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:20:20,539 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 [2022-07-21 17:20:20,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:20,540 INFO L225 Difference]: With dead ends: 58 [2022-07-21 17:20:20,540 INFO L226 Difference]: Without dead ends: 58 [2022-07-21 17:20:20,544 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:20:20,546 INFO L413 NwaCegarLoop]: 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 [2022-07-21 17:20:20,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-21 17:20:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-07-21 17:20:20,555 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) [2022-07-21 17:20:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-21 17:20:20,558 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-21 17:20:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:20,558 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-21 17:20:20,559 INFO L496 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) [2022-07-21 17:20:20,560 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-21 17:20:20,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:20:20,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:20,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:20:20,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 17:20:20,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:20,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-07-21 17:20:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:20,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725255435] [2022-07-21 17:20:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:20,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:20,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:20,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725255435] [2022-07-21 17:20:20,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725255435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:20,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:20,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:20:20,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679244329] [2022-07-21 17:20:20,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:20,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:20,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:20,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:20,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:20:20,639 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) [2022-07-21 17:20:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:20,683 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-07-21 17:20:20,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:20:20,684 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 [2022-07-21 17:20:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:20,685 INFO L225 Difference]: With dead ends: 32 [2022-07-21 17:20:20,685 INFO L226 Difference]: Without dead ends: 32 [2022-07-21 17:20:20,686 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:20:20,687 INFO L413 NwaCegarLoop]: 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 [2022-07-21 17:20:20,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-21 17:20:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-21 17:20:20,694 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) [2022-07-21 17:20:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-21 17:20:20,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-07-21 17:20:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:20,695 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-21 17:20:20,696 INFO L496 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) [2022-07-21 17:20:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-21 17:20:20,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-21 17:20:20,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:20,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-21 17:20:20,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 17:20:20,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:20,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:20,698 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-07-21 17:20:20,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:20,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140004356] [2022-07-21 17:20:20,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:20,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:20,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:20,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:20,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:20,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140004356] [2022-07-21 17:20:20,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140004356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:20,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:20,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:20:20,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073942907] [2022-07-21 17:20:20,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:20,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:20,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:20,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:20,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:20:20,760 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) [2022-07-21 17:20:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:20,815 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-07-21 17:20:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:20:20,815 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 [2022-07-21 17:20:20,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:20,818 INFO L225 Difference]: With dead ends: 55 [2022-07-21 17:20:20,818 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 17:20:20,818 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:20:20,820 INFO L413 NwaCegarLoop]: 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 [2022-07-21 17:20:20,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 17:20:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-07-21 17:20:20,827 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) [2022-07-21 17:20:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-21 17:20:20,828 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-21 17:20:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:20,828 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-21 17:20:20,828 INFO L496 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) [2022-07-21 17:20:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-21 17:20:20,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 17:20:20,829 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:20,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:20,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 17:20:20,829 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:20,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:20,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-07-21 17:20:20,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:20,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234666991] [2022-07-21 17:20:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:20,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:20,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:20,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234666991] [2022-07-21 17:20:20,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234666991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:20,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:20,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:20:20,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057787647] [2022-07-21 17:20:20,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:20,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:20,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:20,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:20,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:20:20,884 INFO L87 Difference]: Start difference. First operand 33 states and 37 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) [2022-07-21 17:20:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:20,954 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-21 17:20:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:20:20,955 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 [2022-07-21 17:20:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:20,956 INFO L225 Difference]: With dead ends: 60 [2022-07-21 17:20:20,956 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 17:20:20,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:20:20,957 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:20,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 17:20:20,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-07-21 17:20:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 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) [2022-07-21 17:20:20,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-07-21 17:20:20,961 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2022-07-21 17:20:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:20,961 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-07-21 17:20:20,962 INFO L496 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) [2022-07-21 17:20:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-07-21 17:20:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 17:20:20,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:20,962 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:20,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 17:20:20,963 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:20,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:20,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-07-21 17:20:20,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:20,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290822921] [2022-07-21 17:20:20,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:20,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:20,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:20,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290822921] [2022-07-21 17:20:20,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290822921] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:20,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113146258] [2022-07-21 17:20:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:20,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:20,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:21,000 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) [2022-07-21 17:20:21,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 17:20:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:21,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-21 17:20:21,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:21,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:21,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:21,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113146258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:21,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:21,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-07-21 17:20:21,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211697207] [2022-07-21 17:20:21,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:21,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:20:21,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:21,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:20:21,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-21 17:20:21,202 INFO L87 Difference]: Start difference. First operand 34 states and 38 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) [2022-07-21 17:20:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:21,285 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-07-21 17:20:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 17:20:21,286 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 [2022-07-21 17:20:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:21,290 INFO L225 Difference]: With dead ends: 130 [2022-07-21 17:20:21,291 INFO L226 Difference]: Without dead ends: 130 [2022-07-21 17:20:21,291 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:20:21,292 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 143 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 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 [2022-07-21 17:20:21,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-21 17:20:21,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-07-21 17:20:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 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) [2022-07-21 17:20:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-21 17:20:21,304 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2022-07-21 17:20:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:21,304 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-21 17:20:21,305 INFO L496 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) [2022-07-21 17:20:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-21 17:20:21,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 17:20:21,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:21,306 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:21,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:21,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-21 17:20:21,520 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:21,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:21,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-07-21 17:20:21,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:21,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861992146] [2022-07-21 17:20:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:21,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:21,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:21,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861992146] [2022-07-21 17:20:21,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861992146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:21,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125230299] [2022-07-21 17:20:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:21,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:21,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:21,621 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) [2022-07-21 17:20:21,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 17:20:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:21,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:20:21,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:21,706 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:20:21,707 INFO L390 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 [2022-07-21 17:20:21,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:21,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:21,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125230299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:21,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:21,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-21 17:20:21,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993350376] [2022-07-21 17:20:21,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:21,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 17:20:21,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:21,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 17:20:21,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:20:21,844 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2022-07-21 17:20:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:22,034 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-07-21 17:20:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:20:22,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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 11 [2022-07-21 17:20:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:22,036 INFO L225 Difference]: With dead ends: 129 [2022-07-21 17:20:22,036 INFO L226 Difference]: Without dead ends: 129 [2022-07-21 17:20:22,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:20:22,037 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 396 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:22,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 100 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:22,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-21 17:20:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2022-07-21 17:20:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 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) [2022-07-21 17:20:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-07-21 17:20:22,042 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-07-21 17:20:22,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:22,043 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-07-21 17:20:22,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 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) [2022-07-21 17:20:22,043 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-07-21 17:20:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 17:20:22,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:22,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:22,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:22,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-21 17:20:22,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:22,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:22,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-07-21 17:20:22,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:22,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268763193] [2022-07-21 17:20:22,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:22,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:22,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:22,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268763193] [2022-07-21 17:20:22,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268763193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:22,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523957760] [2022-07-21 17:20:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:22,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:22,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:22,326 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) [2022-07-21 17:20:22,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 17:20:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:20:22,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:22,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:22,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523957760] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:22,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:22,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-21 17:20:22,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723630096] [2022-07-21 17:20:22,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:22,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:20:22,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:20:22,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:20:22,448 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-07-21 17:20:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:22,585 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-07-21 17:20:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 17:20:22,586 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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 [2022-07-21 17:20:22,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:22,587 INFO L225 Difference]: With dead ends: 88 [2022-07-21 17:20:22,587 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 17:20:22,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:20:22,589 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:22,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 52 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:22,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 17:20:22,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2022-07-21 17:20:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 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) [2022-07-21 17:20:22,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-21 17:20:22,595 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2022-07-21 17:20:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:22,595 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-21 17:20:22,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 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) [2022-07-21 17:20:22,595 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-21 17:20:22,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:20:22,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:22,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:22,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:22,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:22,819 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:22,820 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2022-07-21 17:20:22,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:22,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496685484] [2022-07-21 17:20:22,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:22,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 17:20:22,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:22,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496685484] [2022-07-21 17:20:22,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496685484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:22,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:22,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 17:20:22,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046757371] [2022-07-21 17:20:22,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:22,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 17:20:22,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:22,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 17:20:22,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:20:22,907 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-07-21 17:20:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:22,921 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-07-21 17:20:22,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:20:22,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 [2022-07-21 17:20:22,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:22,922 INFO L225 Difference]: With dead ends: 46 [2022-07-21 17:20:22,922 INFO L226 Difference]: Without dead ends: 46 [2022-07-21 17:20:22,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 17:20:22,925 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:22,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:22,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-21 17:20:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-21 17:20:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 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) [2022-07-21 17:20:22,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-07-21 17:20:22,934 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2022-07-21 17:20:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:22,934 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-07-21 17:20:22,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-07-21 17:20:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-07-21 17:20:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 17:20:22,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:22,936 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:22,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 17:20:22,936 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:22,937 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2022-07-21 17:20:22,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:22,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528075882] [2022-07-21 17:20:22,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:22,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:20:23,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:23,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528075882] [2022-07-21 17:20:23,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528075882] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:23,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 17:20:23,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 17:20:23,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033898956] [2022-07-21 17:20:23,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:23,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:23,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:23,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:23,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 17:20:23,025 INFO L87 Difference]: Start difference. First operand 46 states and 51 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) [2022-07-21 17:20:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:23,053 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-07-21 17:20:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 17:20:23,054 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 [2022-07-21 17:20:23,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:23,055 INFO L225 Difference]: With dead ends: 76 [2022-07-21 17:20:23,055 INFO L226 Difference]: Without dead ends: 76 [2022-07-21 17:20:23,055 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:20:23,056 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:23,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:23,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-21 17:20:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-07-21 17:20:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 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) [2022-07-21 17:20:23,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-07-21 17:20:23,059 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2022-07-21 17:20:23,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:23,060 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-07-21 17:20:23,060 INFO L496 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) [2022-07-21 17:20:23,060 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-07-21 17:20:23,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 17:20:23,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:23,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:23,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 17:20:23,061 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:23,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:23,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2022-07-21 17:20:23,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:23,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382825810] [2022-07-21 17:20:23,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:23,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:20:23,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:23,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382825810] [2022-07-21 17:20:23,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382825810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:23,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906800837] [2022-07-21 17:20:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:23,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:23,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:23,119 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) [2022-07-21 17:20:23,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 17:20:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:23,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 17:20:23,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:20:23,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:23,341 INFO L390 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 28 treesize of output 24 [2022-07-21 17:20:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:20:23,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906800837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:23,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:23,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-21 17:20:23,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264797622] [2022-07-21 17:20:23,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:23,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 17:20:23,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:23,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 17:20:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 17:20:23,401 INFO L87 Difference]: Start difference. First operand 72 states and 82 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) [2022-07-21 17:20:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:23,479 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-07-21 17:20:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:20:23,479 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 [2022-07-21 17:20:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:23,480 INFO L225 Difference]: With dead ends: 80 [2022-07-21 17:20:23,480 INFO L226 Difference]: Without dead ends: 80 [2022-07-21 17:20:23,480 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:20:23,481 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:23,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 41 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:23,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-21 17:20:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-07-21 17:20:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 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) [2022-07-21 17:20:23,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-21 17:20:23,485 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2022-07-21 17:20:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:23,485 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-21 17:20:23,485 INFO L496 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) [2022-07-21 17:20:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-21 17:20:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 17:20:23,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:23,486 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-07-21 17:20:23,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:23,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:23,699 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:23,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:23,700 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-07-21 17:20:23,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:23,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489891445] [2022-07-21 17:20:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:23,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 17:20:23,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:23,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489891445] [2022-07-21 17:20:23,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489891445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:23,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106216260] [2022-07-21 17:20:23,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:23,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:23,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:23,758 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) [2022-07-21 17:20:23,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 17:20:23,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:20:23,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:23,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 17:20:23,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:20:23,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:20:23,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106216260] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:23,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:20:23,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-07-21 17:20:23,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843615383] [2022-07-21 17:20:23,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:23,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:20:23,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:23,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:20:23,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:20:23,889 INFO L87 Difference]: Start difference. First operand 73 states and 83 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) [2022-07-21 17:20:23,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:23,965 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-07-21 17:20:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:20:23,965 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 [2022-07-21 17:20:23,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:23,966 INFO L225 Difference]: With dead ends: 86 [2022-07-21 17:20:23,966 INFO L226 Difference]: Without dead ends: 86 [2022-07-21 17:20:23,967 INFO L412 NwaCegarLoop]: 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 [2022-07-21 17:20:23,967 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:23,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 44 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:23,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-21 17:20:23,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-07-21 17:20:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 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) [2022-07-21 17:20:23,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-07-21 17:20:23,971 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2022-07-21 17:20:23,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:23,971 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-07-21 17:20:23,971 INFO L496 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) [2022-07-21 17:20:23,971 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-07-21 17:20:23,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-21 17:20:23,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:23,972 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:23,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:24,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-21 17:20:24,192 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:24,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2022-07-21 17:20:24,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:24,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436608383] [2022-07-21 17:20:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:24,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:20:24,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436608383] [2022-07-21 17:20:24,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436608383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:24,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674073557] [2022-07-21 17:20:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:24,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:24,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:24,265 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) [2022-07-21 17:20:24,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 17:20:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:24,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 17:20:24,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:24,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:20:24,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674073557] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:24,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:20:24,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-07-21 17:20:24,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225464121] [2022-07-21 17:20:24,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:24,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 17:20:24,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:24,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 17:20:24,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:20:24,510 INFO L87 Difference]: Start difference. First operand 61 states and 66 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) [2022-07-21 17:20:24,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:24,511 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-07-21 17:20:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 17:20:24,512 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 [2022-07-21 17:20:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:24,512 INFO L225 Difference]: With dead ends: 62 [2022-07-21 17:20:24,512 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 17:20:24,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-21 17:20:24,513 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 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 [2022-07-21 17:20:24,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-21 17:20:24,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 17:20:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-21 17:20:24,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 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) [2022-07-21 17:20:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-07-21 17:20:24,516 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2022-07-21 17:20:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:24,516 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-07-21 17:20:24,516 INFO L496 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) [2022-07-21 17:20:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-07-21 17:20:24,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 17:20:24,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:24,517 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:24,540 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:24,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:24,732 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:24,732 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2022-07-21 17:20:24,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:24,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859895456] [2022-07-21 17:20:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:24,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 17:20:24,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:24,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859895456] [2022-07-21 17:20:24,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859895456] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:24,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873425370] [2022-07-21 17:20:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:24,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:24,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:24,795 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) [2022-07-21 17:20:24,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 17:20:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:20:24,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:24,959 INFO L390 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 [2022-07-21 17:20:25,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 17:20:25,010 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 17:20:25,010 INFO L390 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 [2022-07-21 17:20:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:25,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:25,073 INFO L390 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 [2022-07-21 17:20:25,081 INFO L390 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 [2022-07-21 17:20:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 17:20:25,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873425370] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:25,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:25,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2022-07-21 17:20:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248411438] [2022-07-21 17:20:25,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:25,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 17:20:25,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:25,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 17:20:25,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-07-21 17:20:25,212 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 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) [2022-07-21 17:20:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:25,488 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2022-07-21 17:20:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:20:25,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 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 [2022-07-21 17:20:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:25,489 INFO L225 Difference]: With dead ends: 101 [2022-07-21 17:20:25,489 INFO L226 Difference]: Without dead ends: 101 [2022-07-21 17:20:25,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-07-21 17:20:25,490 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:25,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 156 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:20:25,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-21 17:20:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2022-07-21 17:20:25,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 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) [2022-07-21 17:20:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-21 17:20:25,493 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2022-07-21 17:20:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:25,493 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-21 17:20:25,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 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) [2022-07-21 17:20:25,494 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-21 17:20:25,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 17:20:25,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:25,495 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:25,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:25,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:25,720 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:25,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:25,720 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2022-07-21 17:20:25,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:25,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388158747] [2022-07-21 17:20:25,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:25,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:20:25,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:25,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388158747] [2022-07-21 17:20:25,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388158747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:25,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265480468] [2022-07-21 17:20:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:25,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:25,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:25,799 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) [2022-07-21 17:20:25,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 17:20:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:25,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:20:25,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:20:25,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-21 17:20:26,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265480468] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:26,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:26,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-07-21 17:20:26,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369342366] [2022-07-21 17:20:26,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:26,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:20:26,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:26,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:20:26,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:20:26,018 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) [2022-07-21 17:20:26,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:26,236 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-07-21 17:20:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 17:20:26,237 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 34 [2022-07-21 17:20:26,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:26,238 INFO L225 Difference]: With dead ends: 66 [2022-07-21 17:20:26,238 INFO L226 Difference]: Without dead ends: 66 [2022-07-21 17:20:26,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:20:26,238 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:26,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 71 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:20:26,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-21 17:20:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-21 17:20:26,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 states have internal predecessors, (69), 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) [2022-07-21 17:20:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-07-21 17:20:26,241 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2022-07-21 17:20:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:26,242 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-07-21 17:20:26,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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) [2022-07-21 17:20:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-07-21 17:20:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-21 17:20:26,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:26,243 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:26,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 17:20:26,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 17:20:26,459 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:26,460 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2022-07-21 17:20:26,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:26,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656037532] [2022-07-21 17:20:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:26,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 17:20:26,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:26,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656037532] [2022-07-21 17:20:26,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656037532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909833127] [2022-07-21 17:20:26,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:26,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:26,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:26,646 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) [2022-07-21 17:20:26,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 17:20:26,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:20:26,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:26,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:20:26,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:26,714 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:20:26,714 INFO L390 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 [2022-07-21 17:20:26,724 INFO L390 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 [2022-07-21 17:20:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 17:20:26,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 17:20:27,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909833127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:27,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:27,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 10 [2022-07-21 17:20:27,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581997627] [2022-07-21 17:20:27,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:27,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 17:20:27,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 17:20:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-07-21 17:20:27,050 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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) [2022-07-21 17:20:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:27,176 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-07-21 17:20:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:20:27,176 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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 [2022-07-21 17:20:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:27,177 INFO L225 Difference]: With dead ends: 158 [2022-07-21 17:20:27,177 INFO L226 Difference]: Without dead ends: 158 [2022-07-21 17:20:27,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-21 17:20:27,178 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:27,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 93 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-21 17:20:27,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-07-21 17:20:27,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 149 states have internal predecessors, (167), 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) [2022-07-21 17:20:27,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2022-07-21 17:20:27,181 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 39 [2022-07-21 17:20:27,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:27,182 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2022-07-21 17:20:27,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 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) [2022-07-21 17:20:27,182 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2022-07-21 17:20:27,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 17:20:27,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:27,183 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:27,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:27,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-21 17:20:27,391 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:27,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:27,392 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2022-07-21 17:20:27,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:27,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827723938] [2022-07-21 17:20:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:27,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 17:20:27,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:27,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827723938] [2022-07-21 17:20:27,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827723938] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:27,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835373657] [2022-07-21 17:20:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:27,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:27,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:27,475 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) [2022-07-21 17:20:27,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 17:20:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:27,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:20:27,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:27,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:27,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835373657] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:27,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:27,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-07-21 17:20:27,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298316631] [2022-07-21 17:20:27,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:27,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 17:20:27,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:27,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 17:20:27,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-07-21 17:20:27,692 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 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) [2022-07-21 17:20:27,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:27,891 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-07-21 17:20:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 17:20:27,891 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 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 [2022-07-21 17:20:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:27,892 INFO L225 Difference]: With dead ends: 165 [2022-07-21 17:20:27,892 INFO L226 Difference]: Without dead ends: 165 [2022-07-21 17:20:27,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2022-07-21 17:20:27,893 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 165 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:27,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 67 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-21 17:20:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2022-07-21 17:20:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 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) [2022-07-21 17:20:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2022-07-21 17:20:27,896 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 42 [2022-07-21 17:20:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:27,896 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2022-07-21 17:20:27,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 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) [2022-07-21 17:20:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2022-07-21 17:20:27,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 17:20:27,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:27,897 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:27,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:28,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-21 17:20:28,107 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:28,108 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2022-07-21 17:20:28,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:28,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196690480] [2022-07-21 17:20:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:28,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 17:20:28,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:28,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196690480] [2022-07-21 17:20:28,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196690480] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:28,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440673379] [2022-07-21 17:20:28,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:28,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:28,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:28,202 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) [2022-07-21 17:20:28,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 17:20:28,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:20:28,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:28,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 17:20:28,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 17:20:28,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:28,532 INFO L390 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 25 treesize of output 21 [2022-07-21 17:20:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 17:20:28,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440673379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:28,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:28,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-07-21 17:20:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813747616] [2022-07-21 17:20:28,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:28,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 17:20:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 17:20:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-07-21 17:20:28,662 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 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) [2022-07-21 17:20:28,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:28,767 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2022-07-21 17:20:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 17:20:28,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 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 [2022-07-21 17:20:28,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:28,769 INFO L225 Difference]: With dead ends: 146 [2022-07-21 17:20:28,769 INFO L226 Difference]: Without dead ends: 146 [2022-07-21 17:20:28,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:20:28,770 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 216 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:28,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 80 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-21 17:20:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-07-21 17:20:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.129496402877698) internal successors, (157), 143 states have internal predecessors, (157), 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) [2022-07-21 17:20:28,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 157 transitions. [2022-07-21 17:20:28,773 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 157 transitions. Word has length 49 [2022-07-21 17:20:28,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:28,773 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 157 transitions. [2022-07-21 17:20:28,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 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) [2022-07-21 17:20:28,773 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 157 transitions. [2022-07-21 17:20:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-21 17:20:28,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:28,775 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-21 17:20:28,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:28,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 17:20:28,983 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:28,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:28,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1256352513, now seen corresponding path program 3 times [2022-07-21 17:20:28,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:28,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021559054] [2022-07-21 17:20:28,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:28,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-21 17:20:29,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021559054] [2022-07-21 17:20:29,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021559054] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:29,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287451178] [2022-07-21 17:20:29,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:20:29,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:29,091 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) [2022-07-21 17:20:29,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 17:20:29,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-21 17:20:29,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:29,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 17:20:29,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:20:29,165 INFO L390 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 [2022-07-21 17:20:29,168 INFO L390 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 [2022-07-21 17:20:29,367 INFO L390 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 11 treesize of output 3 [2022-07-21 17:20:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-21 17:20:29,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 17:20:29,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287451178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 17:20:29,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 17:20:29,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-07-21 17:20:29,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309745789] [2022-07-21 17:20:29,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 17:20:29,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 17:20:29,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:29,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 17:20:29,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:20:29,419 INFO L87 Difference]: Start difference. First operand 144 states and 157 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 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) [2022-07-21 17:20:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:29,455 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2022-07-21 17:20:29,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 17:20:29,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 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 53 [2022-07-21 17:20:29,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:29,457 INFO L225 Difference]: With dead ends: 142 [2022-07-21 17:20:29,457 INFO L226 Difference]: Without dead ends: 142 [2022-07-21 17:20:29,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-21 17:20:29,457 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:29,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 17:20:29,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-21 17:20:29,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 80. [2022-07-21 17:20:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.077922077922078) internal successors, (83), 79 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) [2022-07-21 17:20:29,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-07-21 17:20:29,460 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 53 [2022-07-21 17:20:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:29,460 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-07-21 17:20:29,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 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) [2022-07-21 17:20:29,460 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-07-21 17:20:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 17:20:29,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:29,461 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 17:20:29,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:29,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:29,661 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:29,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:29,662 INFO L85 PathProgramCache]: Analyzing trace with hash -292223690, now seen corresponding path program 1 times [2022-07-21 17:20:29,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:29,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172970128] [2022-07-21 17:20:29,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:29,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-21 17:20:29,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:29,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172970128] [2022-07-21 17:20:29,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172970128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:29,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919049849] [2022-07-21 17:20:29,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:29,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:29,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:29,733 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) [2022-07-21 17:20:29,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 17:20:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:29,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-21 17:20:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:29,927 INFO L390 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 15 treesize of output 11 [2022-07-21 17:20:30,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 17:20:30,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-21 17:20:30,079 INFO L390 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 19 treesize of output 7 [2022-07-21 17:20:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 17:20:30,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:32,215 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) is different from false [2022-07-21 17:20:32,249 INFO L390 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 21 treesize of output 19 [2022-07-21 17:20:32,253 INFO L390 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 68 treesize of output 66 [2022-07-21 17:20:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 20 trivial. 2 not checked. [2022-07-21 17:20:32,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919049849] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:32,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:32,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 25 [2022-07-21 17:20:32,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878568360] [2022-07-21 17:20:32,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:32,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 17:20:32,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:32,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 17:20:32,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=451, Unknown=1, NotChecked=44, Total=600 [2022-07-21 17:20:32,448 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 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) [2022-07-21 17:20:34,577 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) (<= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)))) (<= 2 |c_ULTIMATE.start_main_#t~ret3#1|) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |c_ULTIMATE.start_foo_#res#1|) (= |c_ULTIMATE.start_main_~i~1#1| 0) (<= 2 |c_ULTIMATE.start_foo_~i~0#1|)) is different from false [2022-07-21 17:20:36,584 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) (<= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)))) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~1#1| 0)) is different from false [2022-07-21 17:20:36,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:36,647 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2022-07-21 17:20:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:20:36,648 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 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 54 [2022-07-21 17:20:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:36,648 INFO L225 Difference]: With dead ends: 71 [2022-07-21 17:20:36,648 INFO L226 Difference]: Without dead ends: 67 [2022-07-21 17:20:36,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=148, Invalid=563, Unknown=3, NotChecked=156, Total=870 [2022-07-21 17:20:36,650 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:36,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 256 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-07-21 17:20:36,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-21 17:20:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-21 17:20:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 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) [2022-07-21 17:20:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-07-21 17:20:36,652 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 54 [2022-07-21 17:20:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:36,652 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-07-21 17:20:36,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 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) [2022-07-21 17:20:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-07-21 17:20:36,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 17:20:36,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:36,653 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-07-21 17:20:36,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:36,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-07-21 17:20:36,854 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:36,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:36,854 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2022-07-21 17:20:36,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:36,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882583835] [2022-07-21 17:20:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:36,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 102 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 17:20:36,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:36,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882583835] [2022-07-21 17:20:36,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882583835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:36,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012545825] [2022-07-21 17:20:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:36,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:37,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:37,001 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) [2022-07-21 17:20:37,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 17:20:37,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:20:37,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:37,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 17:20:37,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 17:20:37,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 17:20:37,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012545825] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:37,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:37,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2022-07-21 17:20:37,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203625108] [2022-07-21 17:20:37,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:37,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 17:20:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 17:20:37,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-07-21 17:20:37,335 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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) [2022-07-21 17:20:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:37,735 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-07-21 17:20:37,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 17:20:37,736 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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 [2022-07-21 17:20:37,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:37,736 INFO L225 Difference]: With dead ends: 108 [2022-07-21 17:20:37,736 INFO L226 Difference]: Without dead ends: 108 [2022-07-21 17:20:37,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 17:20:37,738 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:37,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 73 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:20:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-21 17:20:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-07-21 17:20:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 93 states have internal predecessors, (97), 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) [2022-07-21 17:20:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-07-21 17:20:37,740 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 64 [2022-07-21 17:20:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:37,740 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-07-21 17:20:37,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 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) [2022-07-21 17:20:37,740 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-07-21 17:20:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-21 17:20:37,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:37,741 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-21 17:20:37,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:37,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:37,942 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:37,942 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2022-07-21 17:20:37,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:37,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408316011] [2022-07-21 17:20:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:37,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-21 17:20:38,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:38,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408316011] [2022-07-21 17:20:38,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408316011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:38,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387126012] [2022-07-21 17:20:38,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:20:38,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:38,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:38,021 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) [2022-07-21 17:20:38,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 17:20:38,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-21 17:20:38,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:38,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 17:20:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-21 17:20:38,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-21 17:20:38,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387126012] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:38,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:38,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-07-21 17:20:38,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587959355] [2022-07-21 17:20:38,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:38,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 17:20:38,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:38,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 17:20:38,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2022-07-21 17:20:38,283 INFO L87 Difference]: Start difference. First operand 94 states and 97 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) [2022-07-21 17:20:38,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:38,481 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2022-07-21 17:20:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 17:20:38,482 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 [2022-07-21 17:20:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:38,482 INFO L225 Difference]: With dead ends: 164 [2022-07-21 17:20:38,482 INFO L226 Difference]: Without dead ends: 164 [2022-07-21 17:20:38,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2022-07-21 17:20:38,483 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 278 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:38,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 99 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 17:20:38,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-21 17:20:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2022-07-21 17:20:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 122 states have internal predecessors, (137), 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) [2022-07-21 17:20:38,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2022-07-21 17:20:38,490 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 91 [2022-07-21 17:20:38,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:38,490 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2022-07-21 17:20:38,490 INFO L496 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) [2022-07-21 17:20:38,491 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2022-07-21 17:20:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-21 17:20:38,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:38,493 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-21 17:20:38,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 17:20:38,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:38,704 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2022-07-21 17:20:38,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:38,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023493904] [2022-07-21 17:20:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:38,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:38,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-21 17:20:38,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:38,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023493904] [2022-07-21 17:20:38,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023493904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:38,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671322729] [2022-07-21 17:20:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:38,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:38,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:38,856 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) [2022-07-21 17:20:38,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 17:20:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:38,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 17:20:38,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:38,966 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:20:38,969 INFO L390 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 [2022-07-21 17:20:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-21 17:20:39,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-21 17:20:39,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671322729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:39,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:39,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-07-21 17:20:39,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874056251] [2022-07-21 17:20:39,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:39,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 17:20:39,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:39,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 17:20:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-21 17:20:39,628 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 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) [2022-07-21 17:20:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:40,016 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2022-07-21 17:20:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 17:20:40,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 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 92 [2022-07-21 17:20:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:40,018 INFO L225 Difference]: With dead ends: 160 [2022-07-21 17:20:40,018 INFO L226 Difference]: Without dead ends: 160 [2022-07-21 17:20:40,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-07-21 17:20:40,019 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 224 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:40,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 90 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:20:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-21 17:20:40,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2022-07-21 17:20:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 123 states have internal predecessors, (133), 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) [2022-07-21 17:20:40,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2022-07-21 17:20:40,022 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 92 [2022-07-21 17:20:40,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:40,022 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2022-07-21 17:20:40,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 states have internal predecessors, (112), 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) [2022-07-21 17:20:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2022-07-21 17:20:40,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-21 17:20:40,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:40,027 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-21 17:20:40,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:40,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-21 17:20:40,241 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:40,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:40,242 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2022-07-21 17:20:40,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:40,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105844891] [2022-07-21 17:20:40,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:40,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 470 proven. 378 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-07-21 17:20:40,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:40,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105844891] [2022-07-21 17:20:40,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105844891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:40,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097461113] [2022-07-21 17:20:40,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:20:40,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:40,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:40,420 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) [2022-07-21 17:20:40,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 17:20:40,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:20:40,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:40,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 17:20:40,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-21 17:20:40,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:41,193 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-21 17:20:41,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097461113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:41,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:41,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2022-07-21 17:20:41,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470608155] [2022-07-21 17:20:41,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:41,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 17:20:41,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:41,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 17:20:41,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 17:20:41,196 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 states have internal predecessors, (222), 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) [2022-07-21 17:20:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:42,637 INFO L93 Difference]: Finished difference Result 371 states and 404 transitions. [2022-07-21 17:20:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-21 17:20:42,637 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 states have internal predecessors, (222), 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 [2022-07-21 17:20:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:42,638 INFO L225 Difference]: With dead ends: 371 [2022-07-21 17:20:42,638 INFO L226 Difference]: Without dead ends: 371 [2022-07-21 17:20:42,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3498 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2257, Invalid=8045, Unknown=0, NotChecked=0, Total=10302 [2022-07-21 17:20:42,641 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 536 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:42,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 109 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 17:20:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-07-21 17:20:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 354. [2022-07-21 17:20:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0994318181818181) internal successors, (387), 353 states have internal predecessors, (387), 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) [2022-07-21 17:20:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 387 transitions. [2022-07-21 17:20:42,648 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 387 transitions. Word has length 121 [2022-07-21 17:20:42,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:42,648 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 387 transitions. [2022-07-21 17:20:42,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 states have internal predecessors, (222), 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) [2022-07-21 17:20:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 387 transitions. [2022-07-21 17:20:42,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-07-21 17:20:42,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:42,651 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 44, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-21 17:20:42,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:42,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:42,867 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:42,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1597142136, now seen corresponding path program 5 times [2022-07-21 17:20:42,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:42,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577514326] [2022-07-21 17:20:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:42,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:42,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3266 proven. 218 refuted. 0 times theorem prover too weak. 1898 trivial. 0 not checked. [2022-07-21 17:20:43,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:43,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577514326] [2022-07-21 17:20:43,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577514326] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:43,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532488366] [2022-07-21 17:20:43,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:20:43,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:43,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:43,144 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) [2022-07-21 17:20:43,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 17:20:43,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 17:20:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:43,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 17:20:43,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3117 proven. 501 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2022-07-21 17:20:43,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:43,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3230 proven. 388 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2022-07-21 17:20:43,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532488366] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:43,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:43,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-07-21 17:20:43,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126882891] [2022-07-21 17:20:43,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:43,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-21 17:20:43,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:43,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-21 17:20:43,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-07-21 17:20:43,857 INFO L87 Difference]: Start difference. First operand 354 states and 387 transitions. Second operand has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 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) [2022-07-21 17:20:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:44,617 INFO L93 Difference]: Finished difference Result 354 states and 369 transitions. [2022-07-21 17:20:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-21 17:20:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 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 [2022-07-21 17:20:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:44,618 INFO L225 Difference]: With dead ends: 354 [2022-07-21 17:20:44,619 INFO L226 Difference]: Without dead ends: 354 [2022-07-21 17:20:44,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=866, Invalid=3040, Unknown=0, NotChecked=0, Total=3906 [2022-07-21 17:20:44,620 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 151 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:44,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 99 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:20:44,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-07-21 17:20:44,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-07-21 17:20:44,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0482954545454546) internal successors, (369), 353 states have internal predecessors, (369), 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) [2022-07-21 17:20:44,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 369 transitions. [2022-07-21 17:20:44,627 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 369 transitions. Word has length 281 [2022-07-21 17:20:44,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:44,627 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 369 transitions. [2022-07-21 17:20:44,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 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) [2022-07-21 17:20:44,627 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 369 transitions. [2022-07-21 17:20:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-07-21 17:20:44,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:44,630 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-21 17:20:44,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:44,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:44,849 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:44,849 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 6 times [2022-07-21 17:20:44,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:44,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87909487] [2022-07-21 17:20:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:44,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4200 proven. 311 refuted. 0 times theorem prover too weak. 1821 trivial. 0 not checked. [2022-07-21 17:20:45,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:45,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87909487] [2022-07-21 17:20:45,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87909487] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:45,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893176489] [2022-07-21 17:20:45,163 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:20:45,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:45,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:45,168 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) [2022-07-21 17:20:45,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 17:20:45,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-21 17:20:45,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-21 17:20:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2022-07-21 17:20:45,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2022-07-21 17:20:46,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893176489] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:46,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:46,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 36 [2022-07-21 17:20:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210244624] [2022-07-21 17:20:46,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:46,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-21 17:20:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-21 17:20:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-07-21 17:20:46,124 INFO L87 Difference]: Start difference. First operand 354 states and 369 transitions. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 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) [2022-07-21 17:20:47,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:47,329 INFO L93 Difference]: Finished difference Result 354 states and 365 transitions. [2022-07-21 17:20:47,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 17:20:47,335 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 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 [2022-07-21 17:20:47,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:47,338 INFO L225 Difference]: With dead ends: 354 [2022-07-21 17:20:47,338 INFO L226 Difference]: Without dead ends: 354 [2022-07-21 17:20:47,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=899, Invalid=3793, Unknown=0, NotChecked=0, Total=4692 [2022-07-21 17:20:47,341 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:47,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 109 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 17:20:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-07-21 17:20:47,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-07-21 17:20:47,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0369318181818181) internal successors, (365), 353 states have internal predecessors, (365), 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) [2022-07-21 17:20:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 365 transitions. [2022-07-21 17:20:47,348 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 365 transitions. Word has length 301 [2022-07-21 17:20:47,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:47,349 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 365 transitions. [2022-07-21 17:20:47,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 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) [2022-07-21 17:20:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 365 transitions. [2022-07-21 17:20:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-07-21 17:20:47,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:47,354 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-21 17:20:47,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:47,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:47,567 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:47,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 7 times [2022-07-21 17:20:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:47,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012299460] [2022-07-21 17:20:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:47,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:47,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4815 proven. 419 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2022-07-21 17:20:47,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:47,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012299460] [2022-07-21 17:20:47,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012299460] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:47,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144553205] [2022-07-21 17:20:47,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:20:47,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:47,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:47,896 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) [2022-07-21 17:20:47,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 17:20:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:48,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 17:20:48,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:48,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-07-21 17:20:48,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-07-21 17:20:48,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144553205] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:48,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:48,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 41 [2022-07-21 17:20:48,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937724127] [2022-07-21 17:20:48,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:48,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-21 17:20:48,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:48,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-21 17:20:48,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-07-21 17:20:48,945 INFO L87 Difference]: Start difference. First operand 354 states and 365 transitions. Second operand has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 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) [2022-07-21 17:20:50,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:50,783 INFO L93 Difference]: Finished difference Result 406 states and 414 transitions. [2022-07-21 17:20:50,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-21 17:20:50,784 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 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 [2022-07-21 17:20:50,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:50,785 INFO L225 Difference]: With dead ends: 406 [2022-07-21 17:20:50,785 INFO L226 Difference]: Without dead ends: 406 [2022-07-21 17:20:50,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1270, Invalid=5536, Unknown=0, NotChecked=0, Total=6806 [2022-07-21 17:20:50,787 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:50,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 217 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-21 17:20:50,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-07-21 17:20:50,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 396. [2022-07-21 17:20:50,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 394 states have (on average 1.0253807106598984) internal successors, (404), 395 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) [2022-07-21 17:20:50,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 404 transitions. [2022-07-21 17:20:50,793 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 404 transitions. Word has length 316 [2022-07-21 17:20:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:50,794 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 404 transitions. [2022-07-21 17:20:50,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 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) [2022-07-21 17:20:50,794 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 404 transitions. [2022-07-21 17:20:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-07-21 17:20:50,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:50,796 INFO L195 NwaCegarLoop]: trace histogram [54, 53, 53, 53, 53, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-21 17:20:50,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 17:20:51,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 17:20:51,019 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:51,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:51,019 INFO L85 PathProgramCache]: Analyzing trace with hash -25370281, now seen corresponding path program 8 times [2022-07-21 17:20:51,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:51,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022261501] [2022-07-21 17:20:51,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:51,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 4817 proven. 542 refuted. 0 times theorem prover too weak. 2273 trivial. 0 not checked. [2022-07-21 17:20:51,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:51,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022261501] [2022-07-21 17:20:51,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022261501] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:51,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291951144] [2022-07-21 17:20:51,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:51,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:51,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:51,388 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) [2022-07-21 17:20:51,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 17:20:51,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:20:51,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-21 17:20:51,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 5286 proven. 1646 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-07-21 17:20:52,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 5286 proven. 1646 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-07-21 17:20:52,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291951144] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:52,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:52,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 46 [2022-07-21 17:20:52,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915355634] [2022-07-21 17:20:52,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:52,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-21 17:20:52,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-21 17:20:52,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 17:20:52,541 INFO L87 Difference]: Start difference. First operand 396 states and 404 transitions. Second operand has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 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) [2022-07-21 17:20:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:54,560 INFO L93 Difference]: Finished difference Result 453 states and 459 transitions. [2022-07-21 17:20:54,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-21 17:20:54,560 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 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 [2022-07-21 17:20:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:54,562 INFO L225 Difference]: With dead ends: 453 [2022-07-21 17:20:54,562 INFO L226 Difference]: Without dead ends: 453 [2022-07-21 17:20:54,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1739, Invalid=7767, Unknown=0, NotChecked=0, Total=9506 [2022-07-21 17:20:54,565 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 165 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:54,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 139 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 17:20:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-07-21 17:20:54,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 443. [2022-07-21 17:20:54,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 441 states have (on average 1.018140589569161) internal successors, (449), 442 states have internal predecessors, (449), 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) [2022-07-21 17:20:54,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 449 transitions. [2022-07-21 17:20:54,571 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 449 transitions. Word has length 326 [2022-07-21 17:20:54,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:54,571 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 449 transitions. [2022-07-21 17:20:54,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 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) [2022-07-21 17:20:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 449 transitions. [2022-07-21 17:20:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-07-21 17:20:54,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:54,573 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-21 17:20:54,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-21 17:20:54,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-21 17:20:54,787 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 9 times [2022-07-21 17:20:54,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:54,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211011836] [2022-07-21 17:20:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:54,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 3828 proven. 705 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2022-07-21 17:20:55,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:55,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211011836] [2022-07-21 17:20:55,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211011836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:55,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677941917] [2022-07-21 17:20:55,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:20:55,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:55,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:55,215 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) [2022-07-21 17:20:55,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 17:20:55,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-21 17:20:55,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:55,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 17:20:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 2376 proven. 245 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2022-07-21 17:20:55,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:20:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 2376 proven. 245 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2022-07-21 17:20:56,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677941917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:20:56,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:20:56,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 49 [2022-07-21 17:20:56,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008842119] [2022-07-21 17:20:56,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:20:56,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-21 17:20:56,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:20:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-21 17:20:56,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=1769, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 17:20:56,065 INFO L87 Difference]: Start difference. First operand 443 states and 449 transitions. Second operand has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 states have internal predecessors, (225), 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) [2022-07-21 17:20:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:20:57,944 INFO L93 Difference]: Finished difference Result 699 states and 718 transitions. [2022-07-21 17:20:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-21 17:20:57,944 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 states have internal predecessors, (225), 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 331 [2022-07-21 17:20:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:20:57,946 INFO L225 Difference]: With dead ends: 699 [2022-07-21 17:20:57,946 INFO L226 Difference]: Without dead ends: 699 [2022-07-21 17:20:57,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3611 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3586, Invalid=9754, Unknown=0, NotChecked=0, Total=13340 [2022-07-21 17:20:57,949 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1277 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 17:20:57,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 118 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 17:20:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-07-21 17:20:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 502. [2022-07-21 17:20:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 500 states have (on average 1.062) internal successors, (531), 501 states have internal predecessors, (531), 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) [2022-07-21 17:20:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 531 transitions. [2022-07-21 17:20:57,958 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 531 transitions. Word has length 331 [2022-07-21 17:20:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:20:57,959 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 531 transitions. [2022-07-21 17:20:57,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 states have internal predecessors, (225), 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) [2022-07-21 17:20:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 531 transitions. [2022-07-21 17:20:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-07-21 17:20:57,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:20:57,961 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 56, 56, 56, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-21 17:20:57,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-21 17:20:58,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-21 17:20:58,174 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:20:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:20:58,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1489328682, now seen corresponding path program 2 times [2022-07-21 17:20:58,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:20:58,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725040990] [2022-07-21 17:20:58,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:20:58,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:20:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:20:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 5854 proven. 408 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2022-07-21 17:20:58,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:20:58,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725040990] [2022-07-21 17:20:58,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725040990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:20:58,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657896586] [2022-07-21 17:20:58,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:20:58,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:20:58,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:20:58,520 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) [2022-07-21 17:20:58,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 17:20:58,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 17:20:58,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:20:58,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-21 17:20:58,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:20:58,694 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 17:20:58,694 INFO L390 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 [2022-07-21 17:20:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 10 proven. 2526 refuted. 0 times theorem prover too weak. 5992 trivial. 0 not checked. [2022-07-21 17:20:59,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 0 proven. 2536 refuted. 0 times theorem prover too weak. 5992 trivial. 0 not checked. [2022-07-21 17:21:00,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657896586] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:21:00,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:21:00,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 27 [2022-07-21 17:21:00,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381793777] [2022-07-21 17:21:00,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:00,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 17:21:00,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:21:00,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 17:21:00,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-07-21 17:21:00,370 INFO L87 Difference]: Start difference. First operand 502 states and 531 transitions. Second operand has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 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) [2022-07-21 17:21:01,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:01,393 INFO L93 Difference]: Finished difference Result 501 states and 517 transitions. [2022-07-21 17:21:01,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 17:21:01,394 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 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) Word has length 342 [2022-07-21 17:21:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:01,396 INFO L225 Difference]: With dead ends: 501 [2022-07-21 17:21:01,396 INFO L226 Difference]: Without dead ends: 501 [2022-07-21 17:21:01,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=984, Invalid=2798, Unknown=0, NotChecked=0, Total=3782 [2022-07-21 17:21:01,397 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 618 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:01,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 42 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 17:21:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-21 17:21:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 449. [2022-07-21 17:21:01,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0379464285714286) internal successors, (465), 448 states have internal predecessors, (465), 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) [2022-07-21 17:21:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 465 transitions. [2022-07-21 17:21:01,404 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 465 transitions. Word has length 342 [2022-07-21 17:21:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:01,404 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 465 transitions. [2022-07-21 17:21:01,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 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) [2022-07-21 17:21:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 465 transitions. [2022-07-21 17:21:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-21 17:21:01,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:01,407 INFO L195 NwaCegarLoop]: trace histogram [71, 70, 70, 70, 70, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-21 17:21:01,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:01,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:01,630 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:21:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:01,630 INFO L85 PathProgramCache]: Analyzing trace with hash -935388728, now seen corresponding path program 10 times [2022-07-21 17:21:01,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:21:01,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443181632] [2022-07-21 17:21:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:21:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6122 proven. 217 refuted. 0 times theorem prover too weak. 6648 trivial. 0 not checked. [2022-07-21 17:21:01,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:21:01,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443181632] [2022-07-21 17:21:01,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443181632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:01,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349314374] [2022-07-21 17:21:01,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:21:01,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:01,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:21:01,949 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) [2022-07-21 17:21:01,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 17:21:02,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:21:02,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:21:02,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 17:21:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6467 proven. 1800 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2022-07-21 17:21:02,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6467 proven. 1800 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2022-07-21 17:21:03,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349314374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:21:03,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:21:03,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 37 [2022-07-21 17:21:03,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536522865] [2022-07-21 17:21:03,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:03,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 17:21:03,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:21:03,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 17:21:03,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 17:21:03,195 INFO L87 Difference]: Start difference. First operand 449 states and 465 transitions. Second operand has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 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) [2022-07-21 17:21:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:04,047 INFO L93 Difference]: Finished difference Result 449 states and 464 transitions. [2022-07-21 17:21:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-21 17:21:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 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 411 [2022-07-21 17:21:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:04,049 INFO L225 Difference]: With dead ends: 449 [2022-07-21 17:21:04,049 INFO L226 Difference]: Without dead ends: 449 [2022-07-21 17:21:04,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 802 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1098, Invalid=4304, Unknown=0, NotChecked=0, Total=5402 [2022-07-21 17:21:04,050 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 552 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:04,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 100 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 17:21:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-07-21 17:21:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2022-07-21 17:21:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0357142857142858) internal successors, (464), 448 states have internal predecessors, (464), 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) [2022-07-21 17:21:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 464 transitions. [2022-07-21 17:21:04,057 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 464 transitions. Word has length 411 [2022-07-21 17:21:04,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:04,058 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 464 transitions. [2022-07-21 17:21:04,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 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) [2022-07-21 17:21:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 464 transitions. [2022-07-21 17:21:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-07-21 17:21:04,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:04,061 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-21 17:21:04,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:04,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:04,278 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:21:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:04,278 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 11 times [2022-07-21 17:21:04,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:21:04,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992676084] [2022-07-21 17:21:04,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:04,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:21:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 7790 proven. 1983 refuted. 0 times theorem prover too weak. 5583 trivial. 0 not checked. [2022-07-21 17:21:04,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:21:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992676084] [2022-07-21 17:21:04,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992676084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:04,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911431002] [2022-07-21 17:21:04,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:21:04,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:04,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:21:04,734 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) [2022-07-21 17:21:04,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 17:21:05,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-07-21 17:21:05,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:21:05,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-21 17:21:05,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2150 proven. 12344 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2022-07-21 17:21:06,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:07,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2107 proven. 12387 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2022-07-21 17:21:07,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911431002] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:21:07,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:21:07,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 39, 39] total 87 [2022-07-21 17:21:07,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099651334] [2022-07-21 17:21:07,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:07,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-21 17:21:07,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:21:07,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-21 17:21:07,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1517, Invalid=5965, Unknown=0, NotChecked=0, Total=7482 [2022-07-21 17:21:07,696 INFO L87 Difference]: Start difference. First operand 449 states and 464 transitions. Second operand has 87 states, 87 states have (on average 5.839080459770115) internal successors, (508), 87 states have internal predecessors, (508), 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) [2022-07-21 17:21:18,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:18,872 INFO L93 Difference]: Finished difference Result 1408 states and 1506 transitions. [2022-07-21 17:21:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-07-21 17:21:18,873 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 5.839080459770115) internal successors, (508), 87 states have internal predecessors, (508), 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 448 [2022-07-21 17:21:18,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:18,876 INFO L225 Difference]: With dead ends: 1408 [2022-07-21 17:21:18,876 INFO L226 Difference]: Without dead ends: 1408 [2022-07-21 17:21:18,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1211 GetRequests, 835 SyntacticMatches, 2 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56915 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=26001, Invalid=114999, Unknown=0, NotChecked=0, Total=141000 [2022-07-21 17:21:18,886 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4119 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 2736 mSolverCounterSat, 1653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 4389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1653 IncrementalHoareTripleChecker+Valid, 2736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:18,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4119 Valid, 263 Invalid, 4389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1653 Valid, 2736 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-21 17:21:18,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-07-21 17:21:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1384. [2022-07-21 17:21:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.0715835140997831) internal successors, (1482), 1383 states have internal predecessors, (1482), 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) [2022-07-21 17:21:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1482 transitions. [2022-07-21 17:21:18,901 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1482 transitions. Word has length 448 [2022-07-21 17:21:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:18,902 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1482 transitions. [2022-07-21 17:21:18,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 5.839080459770115) internal successors, (508), 87 states have internal predecessors, (508), 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) [2022-07-21 17:21:18,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1482 transitions. [2022-07-21 17:21:18,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1229 [2022-07-21 17:21:18,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:18,912 INFO L195 NwaCegarLoop]: trace histogram [219, 218, 218, 218, 218, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1] [2022-07-21 17:21:18,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-21 17:21:19,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-21 17:21:19,131 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:21:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:19,132 INFO L85 PathProgramCache]: Analyzing trace with hash -2000272005, now seen corresponding path program 12 times [2022-07-21 17:21:19,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:21:19,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767096284] [2022-07-21 17:21:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:19,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:21:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 124078 backedges. 63448 proven. 1001 refuted. 0 times theorem prover too weak. 59629 trivial. 0 not checked. [2022-07-21 17:21:20,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:21:20,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767096284] [2022-07-21 17:21:20,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767096284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:20,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509235208] [2022-07-21 17:21:20,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:21:20,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:20,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:21:20,087 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) [2022-07-21 17:21:20,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-21 17:21:20,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-07-21 17:21:20,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:21:20,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 17:21:20,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 124078 backedges. 34924 proven. 2265 refuted. 0 times theorem prover too weak. 86889 trivial. 0 not checked. [2022-07-21 17:21:21,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 124078 backedges. 34839 proven. 2350 refuted. 0 times theorem prover too weak. 86889 trivial. 0 not checked. [2022-07-21 17:21:22,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509235208] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:21:22,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:21:22,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 72 [2022-07-21 17:21:22,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717244587] [2022-07-21 17:21:22,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:22,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-21 17:21:22,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:21:22,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-21 17:21:22,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=4157, Unknown=0, NotChecked=0, Total=5112 [2022-07-21 17:21:22,681 INFO L87 Difference]: Start difference. First operand 1384 states and 1482 transitions. Second operand has 72 states, 72 states have (on average 4.638888888888889) internal successors, (334), 72 states have internal predecessors, (334), 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) [2022-07-21 17:21:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:32,608 INFO L93 Difference]: Finished difference Result 3029 states and 3235 transitions. [2022-07-21 17:21:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-07-21 17:21:32,609 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.638888888888889) internal successors, (334), 72 states have internal predecessors, (334), 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 1228 [2022-07-21 17:21:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:32,617 INFO L225 Difference]: With dead ends: 3029 [2022-07-21 17:21:32,617 INFO L226 Difference]: Without dead ends: 3029 [2022-07-21 17:21:32,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2705 GetRequests, 2413 SyntacticMatches, 0 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29457 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=14871, Invalid=71271, Unknown=0, NotChecked=0, Total=86142 [2022-07-21 17:21:32,621 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3804 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 2064 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3804 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 2064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:32,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3804 Valid, 259 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 2064 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 17:21:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-07-21 17:21:32,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1891. [2022-07-21 17:21:32,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 1.0682539682539682) internal successors, (2019), 1890 states have internal predecessors, (2019), 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) [2022-07-21 17:21:32,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 2019 transitions. [2022-07-21 17:21:32,645 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 2019 transitions. Word has length 1228 [2022-07-21 17:21:32,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:32,646 INFO L495 AbstractCegarLoop]: Abstraction has 1891 states and 2019 transitions. [2022-07-21 17:21:32,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.638888888888889) internal successors, (334), 72 states have internal predecessors, (334), 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) [2022-07-21 17:21:32,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 2019 transitions. [2022-07-21 17:21:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1411 [2022-07-21 17:21:32,659 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:32,659 INFO L195 NwaCegarLoop]: trace histogram [254, 253, 253, 253, 253, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2022-07-21 17:21:32,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:32,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-21 17:21:32,875 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:21:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash 594718143, now seen corresponding path program 13 times [2022-07-21 17:21:32,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:21:32,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616715975] [2022-07-21 17:21:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:32,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:21:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 166326 backedges. 86574 proven. 1298 refuted. 0 times theorem prover too weak. 78454 trivial. 0 not checked. [2022-07-21 17:21:33,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:21:33,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616715975] [2022-07-21 17:21:33,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616715975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:33,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200151956] [2022-07-21 17:21:33,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:21:33,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:33,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:21:33,885 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) [2022-07-21 17:21:33,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-21 17:21:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:34,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 4255 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 17:21:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 166326 backedges. 77320 proven. 19602 refuted. 0 times theorem prover too weak. 69404 trivial. 0 not checked. [2022-07-21 17:21:35,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 166326 backedges. 77320 proven. 19602 refuted. 0 times theorem prover too weak. 69404 trivial. 0 not checked. [2022-07-21 17:21:36,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200151956] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:21:36,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:21:36,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 70 [2022-07-21 17:21:36,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396397604] [2022-07-21 17:21:36,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:36,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-21 17:21:36,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:21:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-21 17:21:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=4065, Unknown=0, NotChecked=0, Total=4830 [2022-07-21 17:21:36,328 INFO L87 Difference]: Start difference. First operand 1891 states and 2019 transitions. Second operand has 70 states, 70 states have (on average 6.1) internal successors, (427), 70 states have internal predecessors, (427), 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) [2022-07-21 17:21:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:39,578 INFO L93 Difference]: Finished difference Result 1965 states and 2092 transitions. [2022-07-21 17:21:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-07-21 17:21:39,583 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.1) internal successors, (427), 70 states have internal predecessors, (427), 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 1410 [2022-07-21 17:21:39,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:39,591 INFO L225 Difference]: With dead ends: 1965 [2022-07-21 17:21:39,591 INFO L226 Difference]: Without dead ends: 1965 [2022-07-21 17:21:39,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2966 GetRequests, 2782 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10275 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5823, Invalid=28217, Unknown=0, NotChecked=0, Total=34040 [2022-07-21 17:21:39,594 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1871 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1871 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:39,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1871 Valid, 237 Invalid, 2554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-21 17:21:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-07-21 17:21:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1953. [2022-07-21 17:21:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 1.0655737704918034) internal successors, (2080), 1952 states have internal predecessors, (2080), 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) [2022-07-21 17:21:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2080 transitions. [2022-07-21 17:21:39,615 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2080 transitions. Word has length 1410 [2022-07-21 17:21:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:39,616 INFO L495 AbstractCegarLoop]: Abstraction has 1953 states and 2080 transitions. [2022-07-21 17:21:39,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.1) internal successors, (427), 70 states have internal predecessors, (427), 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) [2022-07-21 17:21:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2080 transitions. [2022-07-21 17:21:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1483 [2022-07-21 17:21:39,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:39,631 INFO L195 NwaCegarLoop]: trace histogram [267, 266, 266, 266, 266, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-21 17:21:39,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:39,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:39,848 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:21:39,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1654195611, now seen corresponding path program 14 times [2022-07-21 17:21:39,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:21:39,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715957874] [2022-07-21 17:21:39,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:39,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:21:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 183855 backedges. 102036 proven. 2964 refuted. 0 times theorem prover too weak. 78855 trivial. 0 not checked. [2022-07-21 17:21:41,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:21:41,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715957874] [2022-07-21 17:21:41,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715957874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:41,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428790540] [2022-07-21 17:21:41,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:21:41,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:41,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:21:41,183 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) [2022-07-21 17:21:41,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-21 17:21:41,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:21:41,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:21:41,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 4470 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 17:21:41,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:43,040 INFO L134 CoverageAnalysis]: Checked inductivity of 183855 backedges. 88629 proven. 26239 refuted. 0 times theorem prover too weak. 68987 trivial. 0 not checked. [2022-07-21 17:21:43,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:43,884 INFO L134 CoverageAnalysis]: Checked inductivity of 183855 backedges. 88629 proven. 26239 refuted. 0 times theorem prover too weak. 68987 trivial. 0 not checked. [2022-07-21 17:21:43,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428790540] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:21:43,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:21:43,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 30] total 74 [2022-07-21 17:21:43,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442369521] [2022-07-21 17:21:43,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:43,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-21 17:21:43,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:21:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-21 17:21:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=4543, Unknown=0, NotChecked=0, Total=5402 [2022-07-21 17:21:43,887 INFO L87 Difference]: Start difference. First operand 1953 states and 2080 transitions. Second operand has 74 states, 74 states have (on average 6.175675675675675) internal successors, (457), 74 states have internal predecessors, (457), 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) [2022-07-21 17:21:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:47,588 INFO L93 Difference]: Finished difference Result 2048 states and 2177 transitions. [2022-07-21 17:21:47,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-07-21 17:21:47,588 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 6.175675675675675) internal successors, (457), 74 states have internal predecessors, (457), 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 1482 [2022-07-21 17:21:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:47,592 INFO L225 Difference]: With dead ends: 2048 [2022-07-21 17:21:47,592 INFO L226 Difference]: Without dead ends: 2048 [2022-07-21 17:21:47,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3130 GetRequests, 2925 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13303 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6833, Invalid=35397, Unknown=0, NotChecked=0, Total=42230 [2022-07-21 17:21:47,595 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1964 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:47,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1964 Valid, 202 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 2251 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 17:21:47,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2022-07-21 17:21:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 2030. [2022-07-21 17:21:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.0640709709216363) internal successors, (2159), 2029 states have internal predecessors, (2159), 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) [2022-07-21 17:21:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2159 transitions. [2022-07-21 17:21:47,616 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2159 transitions. Word has length 1482 [2022-07-21 17:21:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:47,617 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 2159 transitions. [2022-07-21 17:21:47,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 6.175675675675675) internal successors, (457), 74 states have internal predecessors, (457), 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) [2022-07-21 17:21:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2159 transitions. [2022-07-21 17:21:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1555 [2022-07-21 17:21:47,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:47,632 INFO L195 NwaCegarLoop]: trace histogram [280, 279, 279, 279, 279, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2022-07-21 17:21:47,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-21 17:21:47,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:47,841 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:21:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:47,841 INFO L85 PathProgramCache]: Analyzing trace with hash 91939191, now seen corresponding path program 15 times [2022-07-21 17:21:47,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:21:47,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596673906] [2022-07-21 17:21:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:47,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:21:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 202262 backedges. 108381 proven. 2852 refuted. 0 times theorem prover too weak. 91029 trivial. 0 not checked. [2022-07-21 17:21:48,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:21:48,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596673906] [2022-07-21 17:21:48,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596673906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:48,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758994488] [2022-07-21 17:21:48,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 17:21:48,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:48,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:21:48,968 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:21:48,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-21 17:21:49,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-07-21 17:21:49,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:21:49,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-21 17:21:49,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:21:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 202262 backedges. 29290 proven. 1199 refuted. 0 times theorem prover too weak. 171773 trivial. 0 not checked. [2022-07-21 17:21:50,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:21:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 202262 backedges. 29290 proven. 1199 refuted. 0 times theorem prover too weak. 171773 trivial. 0 not checked. [2022-07-21 17:21:50,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758994488] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:21:50,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:21:50,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25, 25] total 68 [2022-07-21 17:21:50,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522123732] [2022-07-21 17:21:50,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:21:50,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-21 17:21:50,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:21:50,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-21 17:21:50,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=3707, Unknown=0, NotChecked=0, Total=4556 [2022-07-21 17:21:50,847 INFO L87 Difference]: Start difference. First operand 2030 states and 2159 transitions. Second operand has 68 states, 68 states have (on average 4.970588235294118) internal successors, (338), 68 states have internal predecessors, (338), 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) [2022-07-21 17:21:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:21:55,131 INFO L93 Difference]: Finished difference Result 2506 states and 2629 transitions. [2022-07-21 17:21:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-07-21 17:21:55,132 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.970588235294118) internal successors, (338), 68 states have internal predecessors, (338), 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 1554 [2022-07-21 17:21:55,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:21:55,138 INFO L225 Difference]: With dead ends: 2506 [2022-07-21 17:21:55,138 INFO L226 Difference]: Without dead ends: 2506 [2022-07-21 17:21:55,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3259 GetRequests, 3073 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9806 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=6644, Invalid=28138, Unknown=0, NotChecked=0, Total=34782 [2022-07-21 17:21:55,141 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1742 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1742 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:21:55,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1742 Valid, 400 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-21 17:21:55,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2022-07-21 17:21:55,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2031. [2022-07-21 17:21:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 1.0453201970443349) internal successors, (2122), 2030 states have internal predecessors, (2122), 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) [2022-07-21 17:21:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2122 transitions. [2022-07-21 17:21:55,165 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2122 transitions. Word has length 1554 [2022-07-21 17:21:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:21:55,166 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 2122 transitions. [2022-07-21 17:21:55,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.970588235294118) internal successors, (338), 68 states have internal predecessors, (338), 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) [2022-07-21 17:21:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2122 transitions. [2022-07-21 17:21:55,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1610 [2022-07-21 17:21:55,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:21:55,182 INFO L195 NwaCegarLoop]: trace histogram [291, 290, 290, 290, 290, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2022-07-21 17:21:55,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-21 17:21:55,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:55,395 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:21:55,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:21:55,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1123683568, now seen corresponding path program 16 times [2022-07-21 17:21:55,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:21:55,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375714091] [2022-07-21 17:21:55,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:21:55,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:21:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:21:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 218146 backedges. 125582 proven. 1823 refuted. 0 times theorem prover too weak. 90741 trivial. 0 not checked. [2022-07-21 17:21:56,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:21:56,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375714091] [2022-07-21 17:21:56,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375714091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:21:56,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453982592] [2022-07-21 17:21:56,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 17:21:56,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:21:56,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:21:56,584 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:21:56,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-21 17:22:07,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 17:22:07,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:22:07,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 4839 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-21 17:22:07,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 218146 backedges. 179733 proven. 16653 refuted. 0 times theorem prover too weak. 21760 trivial. 0 not checked. [2022-07-21 17:22:09,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 218146 backedges. 179733 proven. 16653 refuted. 0 times theorem prover too weak. 21760 trivial. 0 not checked. [2022-07-21 17:22:11,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453982592] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:22:11,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:22:11,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39, 39] total 92 [2022-07-21 17:22:11,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911679223] [2022-07-21 17:22:11,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:22:11,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-21 17:22:11,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:22:11,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-21 17:22:11,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=7046, Unknown=0, NotChecked=0, Total=8372 [2022-07-21 17:22:11,282 INFO L87 Difference]: Start difference. First operand 2031 states and 2122 transitions. Second operand has 92 states, 92 states have (on average 6.771739130434782) internal successors, (623), 92 states have internal predecessors, (623), 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) [2022-07-21 17:22:25,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:25,219 INFO L93 Difference]: Finished difference Result 1740 states and 1768 transitions. [2022-07-21 17:22:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 269 states. [2022-07-21 17:22:25,219 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 6.771739130434782) internal successors, (623), 92 states have internal predecessors, (623), 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 1609 [2022-07-21 17:22:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:25,223 INFO L225 Difference]: With dead ends: 1740 [2022-07-21 17:22:25,223 INFO L226 Difference]: Without dead ends: 1740 [2022-07-21 17:22:25,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3499 GetRequests, 3163 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29424 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=21348, Invalid=92558, Unknown=0, NotChecked=0, Total=113906 [2022-07-21 17:22:25,229 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 271 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 13172 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 13230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 13172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:25,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 548 Invalid, 13230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 13172 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-21 17:22:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-07-21 17:22:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1740. [2022-07-21 17:22:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1739 states have (on average 1.0166762507188039) internal successors, (1768), 1739 states have internal predecessors, (1768), 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) [2022-07-21 17:22:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 1768 transitions. [2022-07-21 17:22:25,247 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 1768 transitions. Word has length 1609 [2022-07-21 17:22:25,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:25,247 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 1768 transitions. [2022-07-21 17:22:25,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 6.771739130434782) internal successors, (623), 92 states have internal predecessors, (623), 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) [2022-07-21 17:22:25,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 1768 transitions. [2022-07-21 17:22:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1720 [2022-07-21 17:22:25,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:25,302 INFO L195 NwaCegarLoop]: trace histogram [313, 312, 312, 312, 312, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2022-07-21 17:22:25,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-21 17:22:25,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-21 17:22:25,527 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:22:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:25,528 INFO L85 PathProgramCache]: Analyzing trace with hash 869955008, now seen corresponding path program 17 times [2022-07-21 17:22:25,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:22:25,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242015317] [2022-07-21 17:22:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:25,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:22:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 251729 backedges. 149520 proven. 2597 refuted. 0 times theorem prover too weak. 99612 trivial. 0 not checked. [2022-07-21 17:22:27,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:22:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242015317] [2022-07-21 17:22:27,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242015317] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283563759] [2022-07-21 17:22:27,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 17:22:27,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:22:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:22:27,037 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:22:27,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-21 17:22:33,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2022-07-21 17:22:33,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:22:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 4483 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-21 17:22:33,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:22:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 251729 backedges. 188591 proven. 19062 refuted. 0 times theorem prover too weak. 44076 trivial. 0 not checked. [2022-07-21 17:22:35,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:22:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 251729 backedges. 191946 proven. 15707 refuted. 0 times theorem prover too weak. 44076 trivial. 0 not checked. [2022-07-21 17:22:36,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283563759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:22:36,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:22:36,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 105 [2022-07-21 17:22:36,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682523131] [2022-07-21 17:22:36,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:22:36,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-21 17:22:36,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:22:36,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-21 17:22:36,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=9146, Unknown=0, NotChecked=0, Total=10920 [2022-07-21 17:22:36,864 INFO L87 Difference]: Start difference. First operand 1740 states and 1768 transitions. Second operand has 105 states, 105 states have (on average 5.761904761904762) internal successors, (605), 105 states have internal predecessors, (605), 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) [2022-07-21 17:22:50,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:22:50,257 INFO L93 Difference]: Finished difference Result 1740 states and 1766 transitions. [2022-07-21 17:22:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-07-21 17:22:50,258 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 5.761904761904762) internal successors, (605), 105 states have internal predecessors, (605), 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 1719 [2022-07-21 17:22:50,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:22:50,262 INFO L225 Difference]: With dead ends: 1740 [2022-07-21 17:22:50,262 INFO L226 Difference]: Without dead ends: 1740 [2022-07-21 17:22:50,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3692 GetRequests, 3376 SyntacticMatches, 0 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25774 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=18548, Invalid=82258, Unknown=0, NotChecked=0, Total=100806 [2022-07-21 17:22:50,293 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 347 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 16592 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 16659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 16592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-21 17:22:50,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 541 Invalid, 16659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 16592 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-21 17:22:50,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-07-21 17:22:50,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1740. [2022-07-21 17:22:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1739 states have (on average 1.0155261644623346) internal successors, (1766), 1739 states have internal predecessors, (1766), 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) [2022-07-21 17:22:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 1766 transitions. [2022-07-21 17:22:50,306 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 1766 transitions. Word has length 1719 [2022-07-21 17:22:50,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:22:50,306 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 1766 transitions. [2022-07-21 17:22:50,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 5.761904761904762) internal successors, (605), 105 states have internal predecessors, (605), 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) [2022-07-21 17:22:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 1766 transitions. [2022-07-21 17:22:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1730 [2022-07-21 17:22:50,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:22:50,324 INFO L195 NwaCegarLoop]: trace histogram [315, 314, 314, 314, 314, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2022-07-21 17:22:50,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-21 17:22:50,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 17:22:50,539 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:22:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:22:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1470670504, now seen corresponding path program 18 times [2022-07-21 17:22:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:22:50,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433520176] [2022-07-21 17:22:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:22:50,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:22:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:22:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 254902 backedges. 158784 proven. 6179 refuted. 0 times theorem prover too weak. 89939 trivial. 0 not checked. [2022-07-21 17:22:52,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:22:52,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433520176] [2022-07-21 17:22:52,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433520176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:22:52,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668588699] [2022-07-21 17:22:52,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 17:22:52,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:22:52,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:22:52,407 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:22:52,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-21 17:23:04,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2022-07-21 17:23:04,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:23:04,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 4936 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-21 17:23:04,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:23:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 254902 backedges. 122160 proven. 32380 refuted. 0 times theorem prover too weak. 100362 trivial. 0 not checked. [2022-07-21 17:23:06,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:23:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 254902 backedges. 122035 proven. 32505 refuted. 0 times theorem prover too weak. 100362 trivial. 0 not checked. [2022-07-21 17:23:08,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668588699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:23:08,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:23:08,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 30, 30] total 103 [2022-07-21 17:23:08,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995814192] [2022-07-21 17:23:08,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:23:08,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-07-21 17:23:08,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:23:08,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-07-21 17:23:08,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=8787, Unknown=0, NotChecked=0, Total=10506 [2022-07-21 17:23:08,131 INFO L87 Difference]: Start difference. First operand 1740 states and 1766 transitions. Second operand has 103 states, 103 states have (on average 5.174757281553398) internal successors, (533), 103 states have internal predecessors, (533), 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) [2022-07-21 17:23:29,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:23:29,126 INFO L93 Difference]: Finished difference Result 3600 states and 3757 transitions. [2022-07-21 17:23:29,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2022-07-21 17:23:29,127 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 5.174757281553398) internal successors, (533), 103 states have internal predecessors, (533), 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 1729 [2022-07-21 17:23:29,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:23:29,134 INFO L225 Difference]: With dead ends: 3600 [2022-07-21 17:23:29,134 INFO L226 Difference]: Without dead ends: 3600 [2022-07-21 17:23:29,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3910 GetRequests, 3401 SyntacticMatches, 0 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93944 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=33897, Invalid=226713, Unknown=0, NotChecked=0, Total=260610 [2022-07-21 17:23:29,142 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 12562 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 5111 mSolverCounterSat, 2939 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12562 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 8050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2939 IncrementalHoareTripleChecker+Valid, 5111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-21 17:23:29,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12562 Valid, 358 Invalid, 8050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2939 Valid, 5111 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-21 17:23:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2022-07-21 17:23:29,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2420. [2022-07-21 17:23:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 1.0227366680446466) internal successors, (2474), 2419 states have internal predecessors, (2474), 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) [2022-07-21 17:23:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 2474 transitions. [2022-07-21 17:23:29,162 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 2474 transitions. Word has length 1729 [2022-07-21 17:23:29,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:23:29,162 INFO L495 AbstractCegarLoop]: Abstraction has 2420 states and 2474 transitions. [2022-07-21 17:23:29,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 5.174757281553398) internal successors, (533), 103 states have internal predecessors, (533), 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) [2022-07-21 17:23:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 2474 transitions. [2022-07-21 17:23:29,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2415 [2022-07-21 17:23:29,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:23:29,193 INFO L195 NwaCegarLoop]: trace histogram [445, 444, 444, 444, 444, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1] [2022-07-21 17:23:29,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-21 17:23:29,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 17:23:29,407 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:23:29,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:23:29,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2111951525, now seen corresponding path program 19 times [2022-07-21 17:23:29,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:23:29,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530106072] [2022-07-21 17:23:29,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:23:29,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:23:30,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:23:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 507117 backedges. 295413 proven. 3506 refuted. 0 times theorem prover too weak. 208198 trivial. 0 not checked. [2022-07-21 17:23:31,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:23:31,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530106072] [2022-07-21 17:23:31,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530106072] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:23:31,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785135736] [2022-07-21 17:23:31,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 17:23:31,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:23:31,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:23:31,803 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:23:31,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-21 17:23:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:23:33,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 7160 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-21 17:23:33,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:23:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 507117 backedges. 378965 proven. 25891 refuted. 0 times theorem prover too weak. 102261 trivial. 0 not checked. [2022-07-21 17:23:35,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 17:23:37,559 INFO L134 CoverageAnalysis]: Checked inductivity of 507117 backedges. 378965 proven. 25891 refuted. 0 times theorem prover too weak. 102261 trivial. 0 not checked. [2022-07-21 17:23:37,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785135736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 17:23:37,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 17:23:37,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 111 [2022-07-21 17:23:37,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775793434] [2022-07-21 17:23:37,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 17:23:37,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-07-21 17:23:37,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 17:23:37,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-07-21 17:23:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1883, Invalid=10327, Unknown=0, NotChecked=0, Total=12210 [2022-07-21 17:23:37,564 INFO L87 Difference]: Start difference. First operand 2420 states and 2474 transitions. Second operand has 111 states, 111 states have (on average 6.27027027027027) internal successors, (696), 111 states have internal predecessors, (696), 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) [2022-07-21 17:23:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 17:23:56,579 INFO L93 Difference]: Finished difference Result 2438 states and 2486 transitions. [2022-07-21 17:23:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 297 states. [2022-07-21 17:23:56,579 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 6.27027027027027) internal successors, (696), 111 states have internal predecessors, (696), 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 2414 [2022-07-21 17:23:56,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 17:23:56,584 INFO L225 Difference]: With dead ends: 2438 [2022-07-21 17:23:56,584 INFO L226 Difference]: Without dead ends: 2438 [2022-07-21 17:23:56,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5148 GetRequests, 4766 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38461 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=24944, Invalid=122128, Unknown=0, NotChecked=0, Total=147072 [2022-07-21 17:23:56,589 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 342 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 19501 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 19560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 19501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-21 17:23:56,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 606 Invalid, 19560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 19501 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-07-21 17:23:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2022-07-21 17:23:56,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2430. [2022-07-21 17:23:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 2429 states have (on average 1.0201729106628241) internal successors, (2478), 2429 states have internal predecessors, (2478), 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) [2022-07-21 17:23:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 2478 transitions. [2022-07-21 17:23:56,607 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 2478 transitions. Word has length 2414 [2022-07-21 17:23:56,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 17:23:56,608 INFO L495 AbstractCegarLoop]: Abstraction has 2430 states and 2478 transitions. [2022-07-21 17:23:56,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 6.27027027027027) internal successors, (696), 111 states have internal predecessors, (696), 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) [2022-07-21 17:23:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 2478 transitions. [2022-07-21 17:23:56,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2430 [2022-07-21 17:23:56,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 17:23:56,639 INFO L195 NwaCegarLoop]: trace histogram [448, 447, 447, 447, 447, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1] [2022-07-21 17:23:56,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-21 17:23:56,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-21 17:23:56,849 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-21 17:23:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 17:23:56,850 INFO L85 PathProgramCache]: Analyzing trace with hash -43800644, now seen corresponding path program 20 times [2022-07-21 17:23:56,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 17:23:56,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882179121] [2022-07-21 17:23:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 17:23:56,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 17:23:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 17:23:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 513879 backedges. 296709 proven. 3839 refuted. 0 times theorem prover too weak. 213331 trivial. 0 not checked. [2022-07-21 17:23:59,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 17:23:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882179121] [2022-07-21 17:23:59,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882179121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 17:23:59,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909506965] [2022-07-21 17:23:59,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 17:23:59,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 17:23:59,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 17:23:59,514 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 17:23:59,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-21 17:24:00,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 17:24:00,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 17:24:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 7202 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-21 17:24:00,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 17:24:03,334 INFO L134 CoverageAnalysis]: Checked inductivity of 513879 backedges. 399434 proven. 29632 refuted. 0 times theorem prover too weak. 84813 trivial. 0 not checked. [2022-07-21 17:24:03,334 INFO L328 TraceCheckSpWp]: Computing backward predicates...