./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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_-read.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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:52:04,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:52:04,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:52:04,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:52:04,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:52:04,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:52:04,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:52:04,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:52:04,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:52:04,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:52:04,531 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:52:04,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:52:04,532 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:52:04,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:52:04,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:52:04,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:52:04,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:52:04,536 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:52:04,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:52:04,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:52:04,539 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:52:04,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:52:04,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:52:04,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:52:04,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:52:04,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:52:04,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:52:04,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:52:04,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:52:04,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:52:04,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:52:04,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:52:04,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:52:04,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:52:04,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:52:04,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:52:04,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:52:04,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:52:04,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:52:04,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:52:04,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:52:04,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:52:04,563 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:52:04,585 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:52:04,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:52:04,586 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:52:04,586 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:52:04,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:52:04,587 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:52:04,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:52:04,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:52:04,587 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:52:04,588 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:52:04,588 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:52:04,589 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:52:04,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:52:04,589 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:52:04,589 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:52:04,589 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:52:04,589 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:52:04,589 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:52:04,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:52:04,591 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:52:04,591 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:52:04,591 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:52:04,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:52:04,591 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:52:04,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:52:04,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:52:04,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:52:04,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:52:04,592 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:52:04,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:52:04,593 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2022-07-20 05:52:04,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:52:04,848 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:52:04,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:52:04,851 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:52:04,851 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:52:04,852 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-07-20 05:52:04,888 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3793de267/04709944734b4182bae01fa810a1f6c6/FLAG820e2c348 [2022-07-20 05:52:05,246 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:52:05,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-07-20 05:52:05,250 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3793de267/04709944734b4182bae01fa810a1f6c6/FLAG820e2c348 [2022-07-20 05:52:05,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3793de267/04709944734b4182bae01fa810a1f6c6 [2022-07-20 05:52:05,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:52:05,268 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:52:05,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:52:05,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:52:05,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:52:05,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d7f1de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05, skipping insertion in model container [2022-07-20 05:52:05,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:52:05,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:52:05,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:52:05,430 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:52:05,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:52:05,453 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:52:05,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05 WrapperNode [2022-07-20 05:52:05,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:52:05,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:52:05,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:52:05,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:52:05,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,484 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-07-20 05:52:05,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:52:05,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:52:05,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:52:05,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:52:05,490 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,505 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:52:05,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:52:05,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:52:05,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:52:05,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (1/1) ... [2022-07-20 05:52:05,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:52:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:05,536 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) [2022-07-20 05:52:05,545 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 [2022-07-20 05:52:05,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:52:05,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:52:05,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:52:05,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:52:05,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:52:05,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:52:05,619 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:52:05,620 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:52:05,758 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:52:05,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:52:05,766 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 05:52:05,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:52:05 BoogieIcfgContainer [2022-07-20 05:52:05,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:52:05,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:52:05,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:52:05,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:52:05,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:52:05" (1/3) ... [2022-07-20 05:52:05,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce3466d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:52:05, skipping insertion in model container [2022-07-20 05:52:05,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:05" (2/3) ... [2022-07-20 05:52:05,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce3466d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:52:05, skipping insertion in model container [2022-07-20 05:52:05,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:52:05" (3/3) ... [2022-07-20 05:52:05,779 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2022-07-20 05:52:05,790 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:52:05,790 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-07-20 05:52:05,825 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:52:05,832 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@37aa5740, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@73c95c6b [2022-07-20 05:52:05,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-20 05:52:05,838 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) [2022-07-20 05:52:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-20 05:52:05,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:05,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-20 05:52:05,849 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)] === [2022-07-20 05:52:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:05,855 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-07-20 05:52:05,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:05,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120656723] [2022-07-20 05:52:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:05,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:06,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:06,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120656723] [2022-07-20 05:52:06,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120656723] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:06,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:06,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:52:06,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154005122] [2022-07-20 05:52:06,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:06,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:52:06,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:06,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:52:06,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:52:06,076 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) [2022-07-20 05:52:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:06,121 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-07-20 05:52:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:52:06,123 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 [2022-07-20 05:52:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:06,128 INFO L225 Difference]: With dead ends: 59 [2022-07-20 05:52:06,129 INFO L226 Difference]: Without dead ends: 55 [2022-07-20 05:52:06,131 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 [2022-07-20 05:52:06,133 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 [2022-07-20 05:52:06,137 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] [2022-07-20 05:52:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-20 05:52:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-07-20 05:52:06,168 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) [2022-07-20 05:52:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-07-20 05:52:06,170 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-07-20 05:52:06,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:06,170 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-07-20 05:52:06,171 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) [2022-07-20 05:52:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-07-20 05:52:06,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 05:52:06,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:06,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 05:52:06,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:52:06,172 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)] === [2022-07-20 05:52:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:06,173 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-07-20 05:52:06,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:06,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740206783] [2022-07-20 05:52:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:06,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:06,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:06,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740206783] [2022-07-20 05:52:06,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740206783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:06,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:06,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:52:06,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044597021] [2022-07-20 05:52:06,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:06,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:52:06,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:06,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:52:06,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:52:06,223 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) [2022-07-20 05:52:06,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:06,251 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-07-20 05:52:06,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:52:06,251 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 [2022-07-20 05:52:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:06,253 INFO L225 Difference]: With dead ends: 58 [2022-07-20 05:52:06,253 INFO L226 Difference]: Without dead ends: 58 [2022-07-20 05:52:06,256 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 [2022-07-20 05:52:06,258 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 [2022-07-20 05:52:06,259 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] [2022-07-20 05:52:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-20 05:52:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-07-20 05:52:06,265 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) [2022-07-20 05:52:06,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-20 05:52:06,267 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-20 05:52:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:06,267 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-20 05:52:06,268 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) [2022-07-20 05:52:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-20 05:52:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 05:52:06,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:06,269 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 05:52:06,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:52:06,270 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)] === [2022-07-20 05:52:06,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:06,273 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-07-20 05:52:06,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:06,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796672430] [2022-07-20 05:52:06,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:06,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:06,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:06,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796672430] [2022-07-20 05:52:06,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796672430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:06,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:06,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:52:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741480499] [2022-07-20 05:52:06,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:06,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:06,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:06,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:06,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:52:06,321 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) [2022-07-20 05:52:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:06,359 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-07-20 05:52:06,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:52:06,360 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 [2022-07-20 05:52:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:06,360 INFO L225 Difference]: With dead ends: 32 [2022-07-20 05:52:06,361 INFO L226 Difference]: Without dead ends: 32 [2022-07-20 05:52:06,361 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 [2022-07-20 05:52:06,362 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 [2022-07-20 05:52:06,371 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] [2022-07-20 05:52:06,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-20 05:52:06,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-20 05:52:06,379 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) [2022-07-20 05:52:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-20 05:52:06,379 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-07-20 05:52:06,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:06,379 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-20 05:52:06,379 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) [2022-07-20 05:52:06,380 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-20 05:52:06,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 05:52:06,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:06,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 05:52:06,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 05:52:06,380 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)] === [2022-07-20 05:52:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-07-20 05:52:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:06,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946193688] [2022-07-20 05:52:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:06,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:06,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:06,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946193688] [2022-07-20 05:52:06,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946193688] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:06,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:06,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:52:06,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569549655] [2022-07-20 05:52:06,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:06,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:06,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:06,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:06,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:52:06,431 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) [2022-07-20 05:52:06,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:06,479 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-07-20 05:52:06,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:52:06,480 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 [2022-07-20 05:52:06,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:06,480 INFO L225 Difference]: With dead ends: 55 [2022-07-20 05:52:06,480 INFO L226 Difference]: Without dead ends: 55 [2022-07-20 05:52:06,480 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 [2022-07-20 05:52:06,481 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 [2022-07-20 05:52:06,481 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] [2022-07-20 05:52:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-20 05:52:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-07-20 05:52:06,499 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) [2022-07-20 05:52:06,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-20 05:52:06,499 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-20 05:52:06,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:06,500 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-20 05:52:06,500 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) [2022-07-20 05:52:06,500 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-20 05:52:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:52:06,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:06,500 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:06,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 05:52:06,501 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)] === [2022-07-20 05:52:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:06,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-07-20 05:52:06,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:06,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545602871] [2022-07-20 05:52:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:06,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:06,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:06,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:06,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545602871] [2022-07-20 05:52:06,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545602871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:06,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:06,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:52:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821512488] [2022-07-20 05:52:06,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:06,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:06,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:52:06,529 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) [2022-07-20 05:52:06,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:06,599 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-20 05:52:06,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:52:06,600 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 [2022-07-20 05:52:06,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:06,600 INFO L225 Difference]: With dead ends: 60 [2022-07-20 05:52:06,600 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 05:52:06,600 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 [2022-07-20 05:52:06,601 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 [2022-07-20 05:52:06,601 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] [2022-07-20 05:52:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 05:52:06,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-07-20 05:52:06,603 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) [2022-07-20 05:52:06,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-07-20 05:52:06,604 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2022-07-20 05:52:06,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:06,604 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-07-20 05:52:06,604 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) [2022-07-20 05:52:06,604 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-07-20 05:52:06,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:52:06,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:06,604 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:06,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 05:52:06,604 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)] === [2022-07-20 05:52:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-07-20 05:52:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:06,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685953169] [2022-07-20 05:52:06,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:06,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:06,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:06,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685953169] [2022-07-20 05:52:06,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685953169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:06,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067322967] [2022-07-20 05:52:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:06,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:06,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:06,668 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) [2022-07-20 05:52:06,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 05:52:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:06,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:52:06,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:06,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:06,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067322967] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:06,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:06,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-07-20 05:52:06,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208634163] [2022-07-20 05:52:06,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:06,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:52:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:06,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:52:06,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:52:06,799 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) [2022-07-20 05:52:06,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:06,849 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-07-20 05:52:06,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:52:06,851 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 [2022-07-20 05:52:06,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:06,852 INFO L225 Difference]: With dead ends: 130 [2022-07-20 05:52:06,853 INFO L226 Difference]: Without dead ends: 130 [2022-07-20 05:52:06,853 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 [2022-07-20 05:52:06,853 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 [2022-07-20 05:52:06,854 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] [2022-07-20 05:52:06,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-20 05:52:06,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-07-20 05:52:06,857 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) [2022-07-20 05:52:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-20 05:52:06,858 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2022-07-20 05:52:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:06,858 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-20 05:52:06,858 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) [2022-07-20 05:52:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-20 05:52:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:52:06,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:06,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:06,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:07,078 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 [2022-07-20 05:52:07,078 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)] === [2022-07-20 05:52:07,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:07,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-07-20 05:52:07,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:07,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028584139] [2022-07-20 05:52:07,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:07,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:07,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:07,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028584139] [2022-07-20 05:52:07,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028584139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:07,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032406502] [2022-07-20 05:52:07,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:07,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:07,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:07,151 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) [2022-07-20 05:52:07,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 05:52:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:07,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:52:07,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:07,225 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:52:07,226 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 [2022-07-20 05:52:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:07,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:07,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032406502] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:07,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:07,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-20 05:52:07,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975298425] [2022-07-20 05:52:07,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:07,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:52:07,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:07,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:52:07,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:52:07,329 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) [2022-07-20 05:52:07,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:07,479 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-07-20 05:52:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:52:07,480 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 [2022-07-20 05:52:07,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:07,481 INFO L225 Difference]: With dead ends: 129 [2022-07-20 05:52:07,481 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 05:52:07,481 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 [2022-07-20 05:52:07,482 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 [2022-07-20 05:52:07,482 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] [2022-07-20 05:52:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 05:52:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2022-07-20 05:52:07,485 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) [2022-07-20 05:52:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-07-20 05:52:07,486 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-07-20 05:52:07,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:07,486 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-07-20 05:52:07,486 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) [2022-07-20 05:52:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-07-20 05:52:07,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 05:52:07,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:07,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:07,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:07,709 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 [2022-07-20 05:52:07,710 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)] === [2022-07-20 05:52:07,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:07,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-07-20 05:52:07,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:07,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116989915] [2022-07-20 05:52:07,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:07,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:07,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:07,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116989915] [2022-07-20 05:52:07,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116989915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:07,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396792085] [2022-07-20 05:52:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:07,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:07,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:07,760 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) [2022-07-20 05:52:07,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 05:52:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:07,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:52:07,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:07,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:07,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396792085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:07,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:07,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-20 05:52:07,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51350973] [2022-07-20 05:52:07,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:07,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:52:07,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:52:07,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:52:07,859 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:07,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:07,960 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-07-20 05:52:07,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:52:07,961 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 05:52:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:07,961 INFO L225 Difference]: With dead ends: 88 [2022-07-20 05:52:07,961 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 05:52:07,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:52:07,962 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 127 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:07,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 62 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 05:52:07,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2022-07-20 05:52:07,964 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) [2022-07-20 05:52:07,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-20 05:52:07,964 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2022-07-20 05:52:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:07,964 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-20 05:52:07,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-20 05:52:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:52:07,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:07,965 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:07,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:08,165 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 [2022-07-20 05:52:08,166 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)] === [2022-07-20 05:52:08,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2022-07-20 05:52:08,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:08,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353176149] [2022-07-20 05:52:08,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:08,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 05:52:08,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:08,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353176149] [2022-07-20 05:52:08,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353176149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:08,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:08,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:52:08,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448447742] [2022-07-20 05:52:08,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:08,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:52:08,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:08,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:52:08,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:52:08,268 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) [2022-07-20 05:52:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:08,278 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-07-20 05:52:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:52:08,279 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 [2022-07-20 05:52:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:08,279 INFO L225 Difference]: With dead ends: 46 [2022-07-20 05:52:08,279 INFO L226 Difference]: Without dead ends: 46 [2022-07-20 05:52:08,279 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 [2022-07-20 05:52:08,280 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:08,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 22 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-20 05:52:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-20 05:52:08,282 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) [2022-07-20 05:52:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-07-20 05:52:08,282 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2022-07-20 05:52:08,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:08,283 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-07-20 05:52:08,283 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) [2022-07-20 05:52:08,283 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-07-20 05:52:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:52:08,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:08,284 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:08,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 05:52:08,284 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)] === [2022-07-20 05:52:08,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:08,284 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2022-07-20 05:52:08,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:08,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674971733] [2022-07-20 05:52:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:08,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:08,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:08,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674971733] [2022-07-20 05:52:08,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674971733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:08,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:08,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:52:08,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708543142] [2022-07-20 05:52:08,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:08,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:08,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:08,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:08,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:52:08,326 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) [2022-07-20 05:52:08,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:08,343 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-07-20 05:52:08,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:52:08,344 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 [2022-07-20 05:52:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:08,344 INFO L225 Difference]: With dead ends: 76 [2022-07-20 05:52:08,344 INFO L226 Difference]: Without dead ends: 76 [2022-07-20 05:52:08,345 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 [2022-07-20 05:52:08,345 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:08,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-20 05:52:08,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-07-20 05:52:08,348 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) [2022-07-20 05:52:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-07-20 05:52:08,348 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2022-07-20 05:52:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:08,349 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-07-20 05:52:08,349 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) [2022-07-20 05:52:08,349 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-07-20 05:52:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:52:08,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:08,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:08,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 05:52:08,350 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)] === [2022-07-20 05:52:08,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:08,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2022-07-20 05:52:08,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:08,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25532300] [2022-07-20 05:52:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:08,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:08,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:08,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25532300] [2022-07-20 05:52:08,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25532300] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:08,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650122877] [2022-07-20 05:52:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:08,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:08,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:08,406 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) [2022-07-20 05:52:08,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 05:52:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:52:08,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:08,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:08,597 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 [2022-07-20 05:52:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:08,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650122877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:08,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:08,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-20 05:52:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981426983] [2022-07-20 05:52:08,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:08,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:52:08,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:52:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:52:08,644 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) [2022-07-20 05:52:08,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:08,709 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-07-20 05:52:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:52:08,709 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 [2022-07-20 05:52:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:08,710 INFO L225 Difference]: With dead ends: 80 [2022-07-20 05:52:08,710 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 05:52:08,710 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 [2022-07-20 05:52:08,710 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:08,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:08,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 05:52:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-07-20 05:52:08,712 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) [2022-07-20 05:52:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-20 05:52:08,713 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2022-07-20 05:52:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:08,713 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-20 05:52:08,713 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) [2022-07-20 05:52:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-20 05:52:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:52:08,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:08,714 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-07-20 05:52:08,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:08,934 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 [2022-07-20 05:52:08,934 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)] === [2022-07-20 05:52:08,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:08,935 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-07-20 05:52:08,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:08,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270900379] [2022-07-20 05:52:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:08,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 05:52:08,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:08,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270900379] [2022-07-20 05:52:08,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270900379] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:08,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:08,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:52:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040691598] [2022-07-20 05:52:08,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:08,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:52:08,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:52:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:52:08,999 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:09,058 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-07-20 05:52:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:52:09,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 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 [2022-07-20 05:52:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:09,059 INFO L225 Difference]: With dead ends: 86 [2022-07-20 05:52:09,060 INFO L226 Difference]: Without dead ends: 86 [2022-07-20 05:52:09,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:52:09,061 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:09,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 65 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:09,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-20 05:52:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-07-20 05:52:09,069 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) [2022-07-20 05:52:09,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-07-20 05:52:09,071 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2022-07-20 05:52:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:09,072 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-07-20 05:52:09,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-07-20 05:52:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:52:09,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:09,075 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] [2022-07-20 05:52:09,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 05:52:09,075 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)] === [2022-07-20 05:52:09,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2022-07-20 05:52:09,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:09,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922339933] [2022-07-20 05:52:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:09,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:09,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:09,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922339933] [2022-07-20 05:52:09,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922339933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:09,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484327920] [2022-07-20 05:52:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:09,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:09,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:09,152 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) [2022-07-20 05:52:09,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 05:52:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:52:09,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:52:09,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:52:09,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484327920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:09,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:52:09,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-20 05:52:09,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211503053] [2022-07-20 05:52:09,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:09,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:09,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:09,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:52:09,471 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) [2022-07-20 05:52:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:09,473 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-07-20 05:52:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:52:09,473 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 [2022-07-20 05:52:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:09,474 INFO L225 Difference]: With dead ends: 62 [2022-07-20 05:52:09,474 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 05:52:09,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:52:09,475 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 [2022-07-20 05:52:09,475 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] [2022-07-20 05:52:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 05:52:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-20 05:52:09,490 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) [2022-07-20 05:52:09,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-07-20 05:52:09,491 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2022-07-20 05:52:09,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:09,492 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-07-20 05:52:09,492 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) [2022-07-20 05:52:09,492 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-07-20 05:52:09,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:52:09,493 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:09,493 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] [2022-07-20 05:52:09,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:09,699 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,SelfDestructingSolverStorable12 [2022-07-20 05:52:09,699 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)] === [2022-07-20 05:52:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2022-07-20 05:52:09,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:09,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816438708] [2022-07-20 05:52:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:09,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 05:52:09,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:09,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816438708] [2022-07-20 05:52:09,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816438708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:09,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994434920] [2022-07-20 05:52:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:09,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:09,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:09,752 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) [2022-07-20 05:52:09,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 05:52:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 05:52:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:09,900 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 [2022-07-20 05:52:09,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:52:09,939 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:52:09,940 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 [2022-07-20 05:52:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:09,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:09,990 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 [2022-07-20 05:52:09,994 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 [2022-07-20 05:52:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:10,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994434920] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:10,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:10,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 11, 11] total 21 [2022-07-20 05:52:10,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064166477] [2022-07-20 05:52:10,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:10,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:52:10,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:52:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:52:10,132 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:10,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:10,358 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2022-07-20 05:52:10,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:52:10,358 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-20 05:52:10,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:10,359 INFO L225 Difference]: With dead ends: 101 [2022-07-20 05:52:10,359 INFO L226 Difference]: Without dead ends: 101 [2022-07-20 05:52:10,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:52:10,359 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:10,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 144 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:52:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-20 05:52:10,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2022-07-20 05:52:10,361 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) [2022-07-20 05:52:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-20 05:52:10,361 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2022-07-20 05:52:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:10,361 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-20 05:52:10,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-20 05:52:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 05:52:10,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:10,362 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:10,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:10,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:10,571 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)] === [2022-07-20 05:52:10,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:10,572 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2022-07-20 05:52:10,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111467472] [2022-07-20 05:52:10,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:10,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:10,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:10,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111467472] [2022-07-20 05:52:10,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111467472] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:10,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081302678] [2022-07-20 05:52:10,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:10,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:10,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:10,621 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) [2022-07-20 05:52:10,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 05:52:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:10,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 05:52:10,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:10,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:10,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081302678] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:10,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:10,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-07-20 05:52:10,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630653435] [2022-07-20 05:52:10,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:10,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:52:10,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:10,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:52:10,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:52:10,791 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 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) [2022-07-20 05:52:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:10,916 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-07-20 05:52:10,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:52:10,917 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 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 [2022-07-20 05:52:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:10,917 INFO L225 Difference]: With dead ends: 66 [2022-07-20 05:52:10,917 INFO L226 Difference]: Without dead ends: 66 [2022-07-20 05:52:10,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:52:10,918 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:10,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 42 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-20 05:52:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-20 05:52:10,919 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) [2022-07-20 05:52:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-07-20 05:52:10,920 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2022-07-20 05:52:10,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:10,920 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-07-20 05:52:10,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 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) [2022-07-20 05:52:10,920 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-07-20 05:52:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 05:52:10,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:10,920 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:10,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-20 05:52:11,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:11,127 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)] === [2022-07-20 05:52:11,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:11,128 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2022-07-20 05:52:11,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:11,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866772982] [2022-07-20 05:52:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:11,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:11,181 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:11,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:11,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866772982] [2022-07-20 05:52:11,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866772982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:11,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503841671] [2022-07-20 05:52:11,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:11,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:11,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:11,184 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) [2022-07-20 05:52:11,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 05:52:11,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:52:11,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:11,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 05:52:11,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:11,260 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:52:11,261 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 [2022-07-20 05:52:11,267 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 [2022-07-20 05:52:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:11,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:11,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503841671] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:11,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:11,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2022-07-20 05:52:11,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959529653] [2022-07-20 05:52:11,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:11,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:52:11,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:11,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:52:11,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:52:11,554 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 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) [2022-07-20 05:52:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:11,618 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-07-20 05:52:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:52:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 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) Word has length 39 [2022-07-20 05:52:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:11,619 INFO L225 Difference]: With dead ends: 158 [2022-07-20 05:52:11,619 INFO L226 Difference]: Without dead ends: 158 [2022-07-20 05:52:11,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:52:11,620 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:11,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 75 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-20 05:52:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-07-20 05:52:11,623 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) [2022-07-20 05:52:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2022-07-20 05:52:11,623 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 39 [2022-07-20 05:52:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:11,624 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2022-07-20 05:52:11,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 8.625) internal successors, (69), 9 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) [2022-07-20 05:52:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2022-07-20 05:52:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 05:52:11,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:11,624 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:11,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:11,841 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,SelfDestructingSolverStorable15 [2022-07-20 05:52:11,842 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)] === [2022-07-20 05:52:11,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:11,842 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2022-07-20 05:52:11,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:11,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047271102] [2022-07-20 05:52:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:11,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 05:52:11,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:11,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047271102] [2022-07-20 05:52:11,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047271102] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:11,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740453509] [2022-07-20 05:52:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:11,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:11,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:11,952 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) [2022-07-20 05:52:11,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 05:52:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:12,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:52:12,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:52:12,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:52:12,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740453509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:12,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:12,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 14 [2022-07-20 05:52:12,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602968517] [2022-07-20 05:52:12,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:12,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:52:12,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:12,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:52:12,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:52:12,167 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:12,367 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-07-20 05:52:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:52:12,368 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-20 05:52:12,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:12,368 INFO L225 Difference]: With dead ends: 165 [2022-07-20 05:52:12,368 INFO L226 Difference]: Without dead ends: 165 [2022-07-20 05:52:12,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2022-07-20 05:52:12,369 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 176 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:12,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 80 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:12,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-20 05:52:12,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2022-07-20 05:52:12,371 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) [2022-07-20 05:52:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2022-07-20 05:52:12,371 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 42 [2022-07-20 05:52:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:12,373 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2022-07-20 05:52:12,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2022-07-20 05:52:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 05:52:12,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:12,373 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] [2022-07-20 05:52:12,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:12,574 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,SelfDestructingSolverStorable16 [2022-07-20 05:52:12,574 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)] === [2022-07-20 05:52:12,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:12,574 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2022-07-20 05:52:12,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:12,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926652112] [2022-07-20 05:52:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:12,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-20 05:52:12,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:12,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926652112] [2022-07-20 05:52:12,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926652112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:12,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974585881] [2022-07-20 05:52:12,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:12,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:12,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:12,650 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) [2022-07-20 05:52:12,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 05:52:12,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:52:12,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:12,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:52:12,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:12,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:12,951 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 [2022-07-20 05:52:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:13,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974585881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:13,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:13,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2022-07-20 05:52:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647219867] [2022-07-20 05:52:13,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 05:52:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:13,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 05:52:13,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:52:13,047 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:13,165 INFO L93 Difference]: Finished difference Result 153 states and 163 transitions. [2022-07-20 05:52:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:52:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-20 05:52:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:13,166 INFO L225 Difference]: With dead ends: 153 [2022-07-20 05:52:13,166 INFO L226 Difference]: Without dead ends: 153 [2022-07-20 05:52:13,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:52:13,167 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 183 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:13,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 108 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-20 05:52:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2022-07-20 05:52:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.119718309859155) internal successors, (159), 146 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 159 transitions. [2022-07-20 05:52:13,169 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 159 transitions. Word has length 49 [2022-07-20 05:52:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:13,169 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 159 transitions. [2022-07-20 05:52:13,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.6) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 159 transitions. [2022-07-20 05:52:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 05:52:13,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:13,169 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-07-20 05:52:13,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:13,379 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,SelfDestructingSolverStorable17 [2022-07-20 05:52:13,379 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:13,380 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2022-07-20 05:52:13,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:13,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067810787] [2022-07-20 05:52:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:13,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 27 proven. 175 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:13,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:13,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067810787] [2022-07-20 05:52:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067810787] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:13,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554620658] [2022-07-20 05:52:13,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:13,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:13,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:13,488 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) [2022-07-20 05:52:13,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 05:52:13,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:52:13,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:13,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 05:52:13,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:13,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:13,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554620658] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:13,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:13,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-07-20 05:52:13,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633228939] [2022-07-20 05:52:13,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:13,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 05:52:13,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:13,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 05:52:13,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:52:13,771 INFO L87 Difference]: Start difference. First operand 147 states and 159 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:14,123 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2022-07-20 05:52:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 05:52:14,124 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-20 05:52:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:14,125 INFO L225 Difference]: With dead ends: 199 [2022-07-20 05:52:14,125 INFO L226 Difference]: Without dead ends: 199 [2022-07-20 05:52:14,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 05:52:14,126 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 282 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:14,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 105 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:52:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-20 05:52:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 145. [2022-07-20 05:52:14,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.1) internal successors, (154), 144 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 154 transitions. [2022-07-20 05:52:14,128 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 154 transitions. Word has length 64 [2022-07-20 05:52:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:14,128 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 154 transitions. [2022-07-20 05:52:14,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 154 transitions. [2022-07-20 05:52:14,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 05:52:14,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:14,129 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-20 05:52:14,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:14,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:14,339 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:14,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:14,340 INFO L85 PathProgramCache]: Analyzing trace with hash -867962629, now seen corresponding path program 3 times [2022-07-20 05:52:14,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:14,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249867847] [2022-07-20 05:52:14,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:14,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-20 05:52:14,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:14,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249867847] [2022-07-20 05:52:14,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249867847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:14,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360982348] [2022-07-20 05:52:14,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:52:14,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:14,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:14,420 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) [2022-07-20 05:52:14,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 05:52:14,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 05:52:14,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 05:52:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:14,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:52:14,474 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 [2022-07-20 05:52:14,476 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 [2022-07-20 05:52:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-20 05:52:14,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:52:14,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360982348] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:14,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:52:14,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2022-07-20 05:52:14,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480842162] [2022-07-20 05:52:14,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:14,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:52:14,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:52:14,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:52:14,692 INFO L87 Difference]: Start difference. First operand 145 states and 154 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:14,719 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2022-07-20 05:52:14,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:52:14,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-20 05:52:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:14,720 INFO L225 Difference]: With dead ends: 143 [2022-07-20 05:52:14,720 INFO L226 Difference]: Without dead ends: 143 [2022-07-20 05:52:14,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:52:14,720 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:14,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-20 05:52:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2022-07-20 05:52:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 110 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-07-20 05:52:14,723 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 75 [2022-07-20 05:52:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:14,723 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-07-20 05:52:14,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-07-20 05:52:14,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 05:52:14,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:14,724 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:14,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:14,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:14,941 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:14,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1660735401, now seen corresponding path program 1 times [2022-07-20 05:52:14,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:14,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193399932] [2022-07-20 05:52:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:14,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 30 proven. 133 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 05:52:15,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:15,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193399932] [2022-07-20 05:52:15,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193399932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:15,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24134758] [2022-07-20 05:52:15,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:15,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:15,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:15,020 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) [2022-07-20 05:52:15,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 05:52:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:15,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 05:52:15,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 05:52:15,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:15,310 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 57 proven. 106 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 05:52:15,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24134758] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:15,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:15,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-07-20 05:52:15,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299303707] [2022-07-20 05:52:15,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:15,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:52:15,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:15,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:52:15,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:52:15,312 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:15,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:15,536 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2022-07-20 05:52:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:52:15,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-20 05:52:15,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:15,537 INFO L225 Difference]: With dead ends: 113 [2022-07-20 05:52:15,537 INFO L226 Difference]: Without dead ends: 113 [2022-07-20 05:52:15,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-07-20 05:52:15,538 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:15,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 100 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-20 05:52:15,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-07-20 05:52:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-07-20 05:52:15,540 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 80 [2022-07-20 05:52:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:15,540 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-07-20 05:52:15,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-07-20 05:52:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-20 05:52:15,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:15,541 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:15,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:15,751 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,SelfDestructingSolverStorable20 [2022-07-20 05:52:15,751 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:15,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:15,752 INFO L85 PathProgramCache]: Analyzing trace with hash 283151040, now seen corresponding path program 2 times [2022-07-20 05:52:15,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:15,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885125107] [2022-07-20 05:52:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:15,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-20 05:52:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885125107] [2022-07-20 05:52:15,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885125107] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:15,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122431454] [2022-07-20 05:52:15,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:15,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:15,804 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) [2022-07-20 05:52:15,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 05:52:15,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 05:52:15,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:15,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:52:15,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-20 05:52:16,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:52:16,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122431454] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:16,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:52:16,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-20 05:52:16,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351825117] [2022-07-20 05:52:16,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:16,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:16,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:16,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:52:16,220 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:16,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:16,221 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2022-07-20 05:52:16,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:52:16,221 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-20 05:52:16,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:16,222 INFO L225 Difference]: With dead ends: 110 [2022-07-20 05:52:16,222 INFO L226 Difference]: Without dead ends: 94 [2022-07-20 05:52:16,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:52:16,223 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:16,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 8 Unchecked, 0.0s Time] [2022-07-20 05:52:16,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-20 05:52:16,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-20 05:52:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-07-20 05:52:16,225 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 85 [2022-07-20 05:52:16,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:16,225 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-07-20 05:52:16,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-07-20 05:52:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 05:52:16,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:16,226 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-20 05:52:16,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:16,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:16,444 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2022-07-20 05:52:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:16,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838421188] [2022-07-20 05:52:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:16,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 05:52:16,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:16,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838421188] [2022-07-20 05:52:16,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838421188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:16,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059473250] [2022-07-20 05:52:16,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:52:16,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:16,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:16,525 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) [2022-07-20 05:52:16,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 05:52:16,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 05:52:16,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:16,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 05:52:16,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:16,612 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:52:16,612 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 [2022-07-20 05:52:16,834 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 13 treesize of output 9 [2022-07-20 05:52:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 3 proven. 227 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-07-20 05:52:16,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-07-20 05:52:17,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059473250] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:17,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:17,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-07-20 05:52:17,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088942603] [2022-07-20 05:52:17,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:17,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 05:52:17,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:17,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 05:52:17,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:52:17,042 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:17,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:17,238 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2022-07-20 05:52:17,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:52:17,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 [2022-07-20 05:52:17,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:17,239 INFO L225 Difference]: With dead ends: 117 [2022-07-20 05:52:17,239 INFO L226 Difference]: Without dead ends: 117 [2022-07-20 05:52:17,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2022-07-20 05:52:17,240 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 196 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:17,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 64 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:17,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-20 05:52:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2022-07-20 05:52:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-07-20 05:52:17,241 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2022-07-20 05:52:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:17,242 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-07-20 05:52:17,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.4375) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:17,242 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-07-20 05:52:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-20 05:52:17,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:17,242 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-20 05:52:17,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:17,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:17,443 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:17,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2022-07-20 05:52:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:17,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151313674] [2022-07-20 05:52:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:17,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 05:52:17,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151313674] [2022-07-20 05:52:17,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151313674] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:17,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896122796] [2022-07-20 05:52:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:17,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:17,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:17,557 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) [2022-07-20 05:52:17,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 05:52:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:17,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:52:17,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:17,666 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:52:17,666 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 [2022-07-20 05:52:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 05:52:17,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 05:52:18,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896122796] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:18,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:18,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-07-20 05:52:18,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014505647] [2022-07-20 05:52:18,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:18,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:52:18,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:18,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:52:18,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:52:18,164 INFO L87 Difference]: Start difference. First operand 93 states and 94 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) [2022-07-20 05:52:18,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:18,469 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2022-07-20 05:52:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:52:18,470 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 [2022-07-20 05:52:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:18,471 INFO L225 Difference]: With dead ends: 159 [2022-07-20 05:52:18,471 INFO L226 Difference]: Without dead ends: 159 [2022-07-20 05:52:18,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:52:18,471 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 281 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:18,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 88 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-20 05:52:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2022-07-20 05:52:18,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2022-07-20 05:52:18,473 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 92 [2022-07-20 05:52:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:18,473 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2022-07-20 05:52:18,474 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) [2022-07-20 05:52:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2022-07-20 05:52:18,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-20 05:52:18,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:18,474 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-20 05:52:18,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:18,674 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,SelfDestructingSolverStorable23 [2022-07-20 05:52:18,675 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:18,675 INFO L85 PathProgramCache]: Analyzing trace with hash -285868558, now seen corresponding path program 2 times [2022-07-20 05:52:18,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:18,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683950289] [2022-07-20 05:52:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:18,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 84 proven. 793 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-20 05:52:18,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683950289] [2022-07-20 05:52:18,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683950289] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:18,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571045314] [2022-07-20 05:52:18,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:18,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:18,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:18,761 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) [2022-07-20 05:52:18,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 05:52:18,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:52:18,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:18,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:52:18,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:19,362 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-20 05:52:19,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:19,591 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 34 treesize of output 30 [2022-07-20 05:52:20,195 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 42 proven. 830 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-20 05:52:20,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571045314] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:20,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:20,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-07-20 05:52:20,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257776283] [2022-07-20 05:52:20,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:20,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 05:52:20,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:20,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 05:52:20,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 05:52:20,199 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:21,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:21,003 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2022-07-20 05:52:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-20 05:52:21,004 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 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 122 [2022-07-20 05:52:21,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:21,005 INFO L225 Difference]: With dead ends: 167 [2022-07-20 05:52:21,005 INFO L226 Difference]: Without dead ends: 167 [2022-07-20 05:52:21,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1268, Invalid=4432, Unknown=0, NotChecked=0, Total=5700 [2022-07-20 05:52:21,006 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:21,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 122 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:52:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-20 05:52:21,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2022-07-20 05:52:21,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 163 transitions. [2022-07-20 05:52:21,008 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 163 transitions. Word has length 122 [2022-07-20 05:52:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:21,009 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 163 transitions. [2022-07-20 05:52:21,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.648648648648648) internal successors, (209), 37 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 163 transitions. [2022-07-20 05:52:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-20 05:52:21,009 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:21,009 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2022-07-20 05:52:21,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:21,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:21,219 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:21,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1906495009, now seen corresponding path program 3 times [2022-07-20 05:52:21,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:21,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906927101] [2022-07-20 05:52:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:21,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 865 proven. 297 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-07-20 05:52:21,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:21,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906927101] [2022-07-20 05:52:21,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906927101] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:21,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967057476] [2022-07-20 05:52:21,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:52:21,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:21,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:21,310 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) [2022-07-20 05:52:21,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 05:52:21,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 05:52:21,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:21,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:52:21,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:21,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 936 proven. 249 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-20 05:52:21,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1476 backedges. 807 proven. 378 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-07-20 05:52:21,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967057476] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:21,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:21,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 36 [2022-07-20 05:52:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188802279] [2022-07-20 05:52:21,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:21,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 05:52:21,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:21,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 05:52:21,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:52:21,888 INFO L87 Difference]: Start difference. First operand 155 states and 163 transitions. Second operand has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:22,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:22,551 INFO L93 Difference]: Finished difference Result 161 states and 167 transitions. [2022-07-20 05:52:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 05:52:22,552 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 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 149 [2022-07-20 05:52:22,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:22,552 INFO L225 Difference]: With dead ends: 161 [2022-07-20 05:52:22,552 INFO L226 Difference]: Without dead ends: 161 [2022-07-20 05:52:22,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=832, Invalid=3328, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 05:52:22,554 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 418 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:22,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 89 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:52:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-20 05:52:22,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2022-07-20 05:52:22,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0454545454545454) internal successors, (161), 154 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2022-07-20 05:52:22,556 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 149 [2022-07-20 05:52:22,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:22,556 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2022-07-20 05:52:22,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:22,556 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2022-07-20 05:52:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-20 05:52:22,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:22,557 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 24, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1] [2022-07-20 05:52:22,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:22,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:22,766 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:22,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:22,766 INFO L85 PathProgramCache]: Analyzing trace with hash -874087090, now seen corresponding path program 4 times [2022-07-20 05:52:22,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:22,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541875793] [2022-07-20 05:52:22,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:22,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:22,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 118 proven. 1328 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-07-20 05:52:22,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:22,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541875793] [2022-07-20 05:52:22,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541875793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:22,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266699024] [2022-07-20 05:52:22,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:52:22,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:22,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:22,904 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) [2022-07-20 05:52:22,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 05:52:23,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:52:23,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:23,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 05:52:23,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-20 05:52:23,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1598 backedges. 283 proven. 1201 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-20 05:52:23,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266699024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:23,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:23,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 35 [2022-07-20 05:52:23,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745551887] [2022-07-20 05:52:23,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:23,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 05:52:23,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:23,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 05:52:23,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=857, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 05:52:23,572 INFO L87 Difference]: Start difference. First operand 155 states and 161 transitions. Second operand has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 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) [2022-07-20 05:52:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:24,632 INFO L93 Difference]: Finished difference Result 401 states and 422 transitions. [2022-07-20 05:52:24,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-20 05:52:24,632 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 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 154 [2022-07-20 05:52:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:24,633 INFO L225 Difference]: With dead ends: 401 [2022-07-20 05:52:24,633 INFO L226 Difference]: Without dead ends: 401 [2022-07-20 05:52:24,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4337 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3118, Invalid=7594, Unknown=0, NotChecked=0, Total=10712 [2022-07-20 05:52:24,636 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 275 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:24,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 98 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:52:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-07-20 05:52:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 390. [2022-07-20 05:52:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.056555269922879) internal successors, (411), 389 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 411 transitions. [2022-07-20 05:52:24,641 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 411 transitions. Word has length 154 [2022-07-20 05:52:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:24,641 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 411 transitions. [2022-07-20 05:52:24,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.428571428571429) internal successors, (225), 35 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) [2022-07-20 05:52:24,641 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 411 transitions. [2022-07-20 05:52:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-07-20 05:52:24,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:24,643 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 49, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-20 05:52:24,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:24,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:24,861 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:24,861 INFO L85 PathProgramCache]: Analyzing trace with hash 747006490, now seen corresponding path program 5 times [2022-07-20 05:52:24,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:24,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737858968] [2022-07-20 05:52:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:24,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:25,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3878 proven. 218 refuted. 0 times theorem prover too weak. 2642 trivial. 0 not checked. [2022-07-20 05:52:25,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:25,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737858968] [2022-07-20 05:52:25,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737858968] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:25,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573460795] [2022-07-20 05:52:25,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:52:25,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:25,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:25,090 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) [2022-07-20 05:52:25,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 05:52:25,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 05:52:25,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:25,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:52:25,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3685 proven. 501 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2022-07-20 05:52:25,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:25,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6738 backedges. 3798 proven. 388 refuted. 0 times theorem prover too weak. 2552 trivial. 0 not checked. [2022-07-20 05:52:25,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573460795] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:25,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:25,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-07-20 05:52:25,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112710314] [2022-07-20 05:52:25,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:25,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 05:52:25,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 05:52:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 05:52:25,725 INFO L87 Difference]: Start difference. First operand 390 states and 411 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) [2022-07-20 05:52:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:26,395 INFO L93 Difference]: Finished difference Result 390 states and 405 transitions. [2022-07-20 05:52:26,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 05:52:26,396 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 314 [2022-07-20 05:52:26,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:26,397 INFO L225 Difference]: With dead ends: 390 [2022-07-20 05:52:26,397 INFO L226 Difference]: Without dead ends: 390 [2022-07-20 05:52:26,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=866, Invalid=3040, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 05:52:26,398 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 134 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 914 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:26,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 95 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 914 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:52:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-20 05:52:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-07-20 05:52:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0411311053984575) internal successors, (405), 389 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 405 transitions. [2022-07-20 05:52:26,415 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 405 transitions. Word has length 314 [2022-07-20 05:52:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:26,415 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 405 transitions. [2022-07-20 05:52:26,415 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) [2022-07-20 05:52:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 405 transitions. [2022-07-20 05:52:26,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-07-20 05:52:26,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:26,418 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 54, 54, 54, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-20 05:52:26,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:26,630 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,SelfDestructingSolverStorable27 [2022-07-20 05:52:26,630 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:26,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:26,631 INFO L85 PathProgramCache]: Analyzing trace with hash -525875421, now seen corresponding path program 6 times [2022-07-20 05:52:26,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:26,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018833921] [2022-07-20 05:52:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:26,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4649 proven. 311 refuted. 0 times theorem prover too weak. 3113 trivial. 0 not checked. [2022-07-20 05:52:26,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:26,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018833921] [2022-07-20 05:52:26,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018833921] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:26,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81424055] [2022-07-20 05:52:26,871 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:52:26,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:26,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:26,872 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) [2022-07-20 05:52:26,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 05:52:27,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-20 05:52:27,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:52:27,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 4943 proven. 852 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2022-07-20 05:52:27,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8073 backedges. 5125 proven. 670 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2022-07-20 05:52:27,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81424055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:27,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:27,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2022-07-20 05:52:27,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523094784] [2022-07-20 05:52:27,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:27,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 05:52:27,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:27,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 05:52:27,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=1462, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 05:52:27,764 INFO L87 Difference]: Start difference. First operand 390 states and 405 transitions. Second operand has 43 states, 43 states have (on average 5.232558139534884) internal successors, (225), 43 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) [2022-07-20 05:52:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:28,759 INFO L93 Difference]: Finished difference Result 390 states and 400 transitions. [2022-07-20 05:52:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 05:52:28,759 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.232558139534884) internal successors, (225), 43 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 339 [2022-07-20 05:52:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:28,760 INFO L225 Difference]: With dead ends: 390 [2022-07-20 05:52:28,760 INFO L226 Difference]: Without dead ends: 390 [2022-07-20 05:52:28,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1250, Invalid=4602, Unknown=0, NotChecked=0, Total=5852 [2022-07-20 05:52:28,762 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 157 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:28,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 107 Invalid, 1422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:52:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-20 05:52:28,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-07-20 05:52:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0282776349614395) internal successors, (400), 389 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 400 transitions. [2022-07-20 05:52:28,765 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 400 transitions. Word has length 339 [2022-07-20 05:52:28,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:28,766 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 400 transitions. [2022-07-20 05:52:28,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.232558139534884) internal successors, (225), 43 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) [2022-07-20 05:52:28,766 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 400 transitions. [2022-07-20 05:52:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-07-20 05:52:28,768 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:28,768 INFO L195 NwaCegarLoop]: trace histogram [59, 59, 58, 58, 58, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-20 05:52:28,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:28,986 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,SelfDestructingSolverStorable28 [2022-07-20 05:52:28,987 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)] === [2022-07-20 05:52:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:28,987 INFO L85 PathProgramCache]: Analyzing trace with hash -814421421, now seen corresponding path program 7 times [2022-07-20 05:52:28,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:28,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011515633] [2022-07-20 05:52:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:28,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 5360 proven. 419 refuted. 0 times theorem prover too weak. 3452 trivial. 0 not checked. [2022-07-20 05:52:29,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:29,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011515633] [2022-07-20 05:52:29,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011515633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:29,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276646535] [2022-07-20 05:52:29,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:52:29,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:29,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:29,276 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) [2022-07-20 05:52:29,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 05:52:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:29,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:52:29,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2022-07-20 05:52:29,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9231 backedges. 6271 proven. 1132 refuted. 0 times theorem prover too weak. 1828 trivial. 0 not checked. [2022-07-20 05:52:30,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276646535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:30,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:30,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 41 [2022-07-20 05:52:30,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343106665] [2022-07-20 05:52:30,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:30,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 05:52:30,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:30,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 05:52:30,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 05:52:30,186 INFO L87 Difference]: Start difference. First operand 390 states and 400 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) [2022-07-20 05:52:31,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:31,531 INFO L93 Difference]: Finished difference Result 390 states and 396 transitions. [2022-07-20 05:52:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 05:52:31,532 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 359 [2022-07-20 05:52:31,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:31,533 INFO L225 Difference]: With dead ends: 390 [2022-07-20 05:52:31,533 INFO L226 Difference]: Without dead ends: 390 [2022-07-20 05:52:31,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 779 GetRequests, 698 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1270, Invalid=5536, Unknown=0, NotChecked=0, Total=6806 [2022-07-20 05:52:31,535 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 1880 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:31,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 165 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 05:52:31,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-20 05:52:31,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-07-20 05:52:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0179948586118253) internal successors, (396), 389 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 396 transitions. [2022-07-20 05:52:31,540 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 396 transitions. Word has length 359 [2022-07-20 05:52:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:31,540 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 396 transitions. [2022-07-20 05:52:31,540 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) [2022-07-20 05:52:31,540 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 396 transitions. [2022-07-20 05:52:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-07-20 05:52:31,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:31,542 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 61, 61, 61, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-20 05:52:31,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:31,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:31,759 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:31,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:31,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1672251698, now seen corresponding path program 8 times [2022-07-20 05:52:31,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:31,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436096349] [2022-07-20 05:52:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:31,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 5981 proven. 542 refuted. 0 times theorem prover too weak. 3629 trivial. 0 not checked. [2022-07-20 05:52:32,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:32,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436096349] [2022-07-20 05:52:32,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436096349] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:32,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745522967] [2022-07-20 05:52:32,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:32,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:32,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:32,078 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) [2022-07-20 05:52:32,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 05:52:32,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:52:32,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:32,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:52:32,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2022-07-20 05:52:32,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10152 backedges. 7207 proven. 1646 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2022-07-20 05:52:33,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745522967] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:33,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:33,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 46 [2022-07-20 05:52:33,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25504974] [2022-07-20 05:52:33,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:33,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 05:52:33,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:33,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 05:52:33,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 05:52:33,155 INFO L87 Difference]: Start difference. First operand 390 states and 396 transitions. Second operand has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:34,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:34,810 INFO L93 Difference]: Finished difference Result 390 states and 393 transitions. [2022-07-20 05:52:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-20 05:52:34,811 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 0 states have call successors, (0), 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 374 [2022-07-20 05:52:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:34,813 INFO L225 Difference]: With dead ends: 390 [2022-07-20 05:52:34,813 INFO L226 Difference]: Without dead ends: 390 [2022-07-20 05:52:34,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1739, Invalid=7767, Unknown=0, NotChecked=0, Total=9506 [2022-07-20 05:52:34,816 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 160 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3108 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:34,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 220 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3108 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 05:52:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-07-20 05:52:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-07-20 05:52:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.0102827763496145) internal successors, (393), 389 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 393 transitions. [2022-07-20 05:52:34,825 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 393 transitions. Word has length 374 [2022-07-20 05:52:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:34,825 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 393 transitions. [2022-07-20 05:52:34,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.086956521739131) internal successors, (280), 46 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 393 transitions. [2022-07-20 05:52:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-07-20 05:52:34,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:34,827 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 63, 63, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-20 05:52:34,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:35,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:35,045 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:35,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1649762294, now seen corresponding path program 9 times [2022-07-20 05:52:35,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:35,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517268771] [2022-07-20 05:52:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:35,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 7290 proven. 2602 refuted. 0 times theorem prover too weak. 899 trivial. 0 not checked. [2022-07-20 05:52:35,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:35,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517268771] [2022-07-20 05:52:35,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517268771] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:35,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773481272] [2022-07-20 05:52:35,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:52:35,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:35,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:35,344 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) [2022-07-20 05:52:35,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 05:52:35,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-20 05:52:35,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:35,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 05:52:35,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:35,519 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:52:35,519 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 [2022-07-20 05:52:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2022-07-20 05:52:36,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10791 backedges. 0 proven. 3163 refuted. 0 times theorem prover too weak. 7628 trivial. 0 not checked. [2022-07-20 05:52:37,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773481272] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:37,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:37,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2022-07-20 05:52:37,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163695574] [2022-07-20 05:52:37,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:37,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 05:52:37,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:37,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 05:52:37,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=1744, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 05:52:37,804 INFO L87 Difference]: Start difference. First operand 390 states and 393 transitions. Second operand has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:40,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:40,828 INFO L93 Difference]: Finished difference Result 522 states and 535 transitions. [2022-07-20 05:52:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-20 05:52:40,828 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 0 states have call successors, (0), 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 384 [2022-07-20 05:52:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:40,830 INFO L225 Difference]: With dead ends: 522 [2022-07-20 05:52:40,830 INFO L226 Difference]: Without dead ends: 522 [2022-07-20 05:52:40,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 742 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5279 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4623, Invalid=15117, Unknown=0, NotChecked=0, Total=19740 [2022-07-20 05:52:40,831 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 696 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:40,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [696 Valid, 200 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 05:52:40,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-07-20 05:52:40,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 450. [2022-07-20 05:52:40,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.0311804008908685) internal successors, (463), 449 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 463 transitions. [2022-07-20 05:52:40,838 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 463 transitions. Word has length 384 [2022-07-20 05:52:40,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:40,838 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 463 transitions. [2022-07-20 05:52:40,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.191489361702128) internal successors, (291), 47 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 463 transitions. [2022-07-20 05:52:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2022-07-20 05:52:40,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:40,840 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-20 05:52:40,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:41,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:41,057 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:41,058 INFO L85 PathProgramCache]: Analyzing trace with hash -2070971837, now seen corresponding path program 10 times [2022-07-20 05:52:41,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:41,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799319113] [2022-07-20 05:52:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:41,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 417 proven. 13839 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2022-07-20 05:52:41,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799319113] [2022-07-20 05:52:41,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799319113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:41,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024646296] [2022-07-20 05:52:41,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:52:41,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:41,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:41,353 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) [2022-07-20 05:52:41,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 05:52:41,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:52:41,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:41,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 05:52:41,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:42,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2022-07-20 05:52:42,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:43,301 INFO L134 CoverageAnalysis]: Checked inductivity of 15432 backedges. 1329 proven. 13224 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2022-07-20 05:52:43,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024646296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:43,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:43,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 35, 35] total 70 [2022-07-20 05:52:43,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907982364] [2022-07-20 05:52:43,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:43,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-20 05:52:43,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-20 05:52:43,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1339, Invalid=3491, Unknown=0, NotChecked=0, Total=4830 [2022-07-20 05:52:43,304 INFO L87 Difference]: Start difference. First operand 450 states and 463 transitions. Second operand has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 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) [2022-07-20 05:52:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:48,104 INFO L93 Difference]: Finished difference Result 1468 states and 1557 transitions. [2022-07-20 05:52:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2022-07-20 05:52:48,105 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 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) Word has length 449 [2022-07-20 05:52:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:48,122 INFO L225 Difference]: With dead ends: 1468 [2022-07-20 05:52:48,126 INFO L226 Difference]: Without dead ends: 1468 [2022-07-20 05:52:48,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 852 SyntacticMatches, 1 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62622 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=34492, Invalid=81448, Unknown=0, NotChecked=0, Total=115940 [2022-07-20 05:52:48,134 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 660 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:48,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [660 Valid, 176 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 05:52:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2022-07-20 05:52:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1457. [2022-07-20 05:52:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0618131868131868) internal successors, (1546), 1456 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1546 transitions. [2022-07-20 05:52:48,161 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1546 transitions. Word has length 449 [2022-07-20 05:52:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:48,161 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1546 transitions. [2022-07-20 05:52:48,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.642857142857143) internal successors, (465), 70 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) [2022-07-20 05:52:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1546 transitions. [2022-07-20 05:52:48,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2022-07-20 05:52:48,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:48,169 INFO L195 NwaCegarLoop]: trace histogram [187, 187, 186, 186, 186, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2022-07-20 05:52:48,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:48,383 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,SelfDestructingSolverStorable32 [2022-07-20 05:52:48,383 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:48,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1138886418, now seen corresponding path program 11 times [2022-07-20 05:52:48,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:48,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091451245] [2022-07-20 05:52:48,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:48,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 34458 proven. 833 refuted. 0 times theorem prover too weak. 56382 trivial. 0 not checked. [2022-07-20 05:52:49,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091451245] [2022-07-20 05:52:49,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091451245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859479933] [2022-07-20 05:52:49,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:52:49,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:49,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:49,094 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) [2022-07-20 05:52:49,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 05:52:49,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-07-20 05:52:49,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:49,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 05:52:49,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 48319 proven. 3482 refuted. 0 times theorem prover too weak. 39872 trivial. 0 not checked. [2022-07-20 05:52:50,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 91673 backedges. 49198 proven. 2603 refuted. 0 times theorem prover too weak. 39872 trivial. 0 not checked. [2022-07-20 05:52:51,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859479933] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:51,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:51,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 65 [2022-07-20 05:52:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469543356] [2022-07-20 05:52:51,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:51,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-20 05:52:51,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-20 05:52:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=3430, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 05:52:51,055 INFO L87 Difference]: Start difference. First operand 1457 states and 1546 transitions. Second operand has 65 states, 65 states have (on average 5.369230769230769) internal successors, (349), 65 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:53,804 INFO L93 Difference]: Finished difference Result 1457 states and 1534 transitions. [2022-07-20 05:52:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-20 05:52:53,805 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.369230769230769) internal successors, (349), 65 states have internal predecessors, (349), 0 states have call successors, (0), 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 1076 [2022-07-20 05:52:53,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:53,808 INFO L225 Difference]: With dead ends: 1457 [2022-07-20 05:52:53,808 INFO L226 Difference]: Without dead ends: 1457 [2022-07-20 05:52:53,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2250 GetRequests, 2114 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4642 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3778, Invalid=15128, Unknown=0, NotChecked=0, Total=18906 [2022-07-20 05:52:53,811 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 230 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3623 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:53,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 170 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3623 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 05:52:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-07-20 05:52:53,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1457. [2022-07-20 05:52:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1456 states have (on average 1.0535714285714286) internal successors, (1534), 1456 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:53,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1534 transitions. [2022-07-20 05:52:53,851 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1534 transitions. Word has length 1076 [2022-07-20 05:52:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:53,851 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 1534 transitions. [2022-07-20 05:52:53,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.369230769230769) internal successors, (349), 65 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:53,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1534 transitions. [2022-07-20 05:52:53,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1132 [2022-07-20 05:52:53,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:53,860 INFO L195 NwaCegarLoop]: trace histogram [198, 198, 197, 197, 197, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2022-07-20 05:52:53,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:54,079 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,SelfDestructingSolverStorable33 [2022-07-20 05:52:54,079 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1593275497, now seen corresponding path program 12 times [2022-07-20 05:52:54,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:54,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506378782] [2022-07-20 05:52:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 38226 proven. 1001 refuted. 0 times theorem prover too weak. 63204 trivial. 0 not checked. [2022-07-20 05:52:54,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:54,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506378782] [2022-07-20 05:52:54,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506378782] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:54,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556741741] [2022-07-20 05:52:54,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:52:54,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:54,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:54,853 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) [2022-07-20 05:52:54,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 05:52:55,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-07-20 05:52:55,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:55,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 05:52:55,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:55,350 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:52:55,351 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 [2022-07-20 05:52:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 9527 proven. 20565 refuted. 0 times theorem prover too weak. 72339 trivial. 0 not checked. [2022-07-20 05:52:58,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 102431 backedges. 0 proven. 30092 refuted. 0 times theorem prover too weak. 72339 trivial. 0 not checked. [2022-07-20 05:53:01,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556741741] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:01,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:53:01,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19, 19] total 64 [2022-07-20 05:53:01,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349810479] [2022-07-20 05:53:01,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:01,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-20 05:53:01,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:53:01,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-20 05:53:01,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=3359, Unknown=0, NotChecked=0, Total=4032 [2022-07-20 05:53:01,551 INFO L87 Difference]: Start difference. First operand 1457 states and 1534 transitions. Second operand has 64 states, 64 states have (on average 4.890625) internal successors, (313), 64 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:09,358 INFO L93 Difference]: Finished difference Result 1665 states and 1746 transitions. [2022-07-20 05:53:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-07-20 05:53:09,358 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.890625) internal successors, (313), 64 states have internal predecessors, (313), 0 states have call successors, (0), 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 1131 [2022-07-20 05:53:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:09,362 INFO L225 Difference]: With dead ends: 1665 [2022-07-20 05:53:09,362 INFO L226 Difference]: Without dead ends: 1665 [2022-07-20 05:53:09,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2451 GetRequests, 2228 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15973 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=8366, Invalid=42034, Unknown=0, NotChecked=0, Total=50400 [2022-07-20 05:53:09,366 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2795 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1919 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2795 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 2656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 1919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:09,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2795 Valid, 234 Invalid, 2656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [737 Valid, 1919 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 05:53:09,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2022-07-20 05:53:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1592. [2022-07-20 05:53:09,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0521684475172848) internal successors, (1674), 1591 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1674 transitions. [2022-07-20 05:53:09,381 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1674 transitions. Word has length 1131 [2022-07-20 05:53:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:09,382 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1674 transitions. [2022-07-20 05:53:09,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.890625) internal successors, (313), 64 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1674 transitions. [2022-07-20 05:53:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2022-07-20 05:53:09,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:09,393 INFO L195 NwaCegarLoop]: trace histogram [232, 232, 231, 231, 231, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-20 05:53:09,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:09,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-20 05:53:09,607 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:53:09,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:09,608 INFO L85 PathProgramCache]: Analyzing trace with hash 738738834, now seen corresponding path program 13 times [2022-07-20 05:53:09,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:53:09,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651857914] [2022-07-20 05:53:09,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:09,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:53:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:10,444 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 64944 proven. 1184 refuted. 0 times theorem prover too weak. 73753 trivial. 0 not checked. [2022-07-20 05:53:10,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:53:10,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651857914] [2022-07-20 05:53:10,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651857914] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:10,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041811659] [2022-07-20 05:53:10,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:53:10,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:10,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:53:10,446 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) [2022-07-20 05:53:10,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 05:53:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:11,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 3982 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 05:53:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:12,065 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 81118 proven. 5182 refuted. 0 times theorem prover too weak. 53581 trivial. 0 not checked. [2022-07-20 05:53:12,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 139881 backedges. 81118 proven. 5182 refuted. 0 times theorem prover too weak. 53581 trivial. 0 not checked. [2022-07-20 05:53:12,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041811659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:12,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:53:12,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 66 [2022-07-20 05:53:12,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821950611] [2022-07-20 05:53:12,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:12,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-20 05:53:12,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:53:12,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-20 05:53:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=3586, Unknown=0, NotChecked=0, Total=4290 [2022-07-20 05:53:12,854 INFO L87 Difference]: Start difference. First operand 1592 states and 1674 transitions. Second operand has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:16,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:16,010 INFO L93 Difference]: Finished difference Result 1592 states and 1663 transitions. [2022-07-20 05:53:16,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-20 05:53:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 0 states have call successors, (0), 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 1308 [2022-07-20 05:53:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:16,014 INFO L225 Difference]: With dead ends: 1592 [2022-07-20 05:53:16,014 INFO L226 Difference]: Without dead ends: 1592 [2022-07-20 05:53:16,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2747 GetRequests, 2581 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6787 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4910, Invalid=23146, Unknown=0, NotChecked=0, Total=28056 [2022-07-20 05:53:16,018 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 213 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 7138 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 7177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 7138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:16,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 252 Invalid, 7177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 7138 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 05:53:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2022-07-20 05:53:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 1592. [2022-07-20 05:53:16,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 1.0452545568824638) internal successors, (1663), 1591 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 1663 transitions. [2022-07-20 05:53:16,031 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 1663 transitions. Word has length 1308 [2022-07-20 05:53:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:16,031 INFO L495 AbstractCegarLoop]: Abstraction has 1592 states and 1663 transitions. [2022-07-20 05:53:16,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 6.181818181818182) internal successors, (408), 66 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 1663 transitions. [2022-07-20 05:53:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1354 [2022-07-20 05:53:16,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:16,043 INFO L195 NwaCegarLoop]: trace histogram [241, 241, 240, 240, 240, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-20 05:53:16,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:16,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:16,259 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:53:16,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1786428189, now seen corresponding path program 14 times [2022-07-20 05:53:16,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:53:16,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796792534] [2022-07-20 05:53:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:16,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:53:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 69671 proven. 1382 refuted. 0 times theorem prover too weak. 79619 trivial. 0 not checked. [2022-07-20 05:53:17,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:53:17,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796792534] [2022-07-20 05:53:17,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796792534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:17,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691210312] [2022-07-20 05:53:17,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:53:17,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:17,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:53:17,015 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) [2022-07-20 05:53:17,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 05:53:17,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:53:17,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:53:17,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 4108 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:53:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 93912 proven. 6511 refuted. 0 times theorem prover too weak. 50249 trivial. 0 not checked. [2022-07-20 05:53:18,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 150672 backedges. 93912 proven. 6511 refuted. 0 times theorem prover too weak. 50249 trivial. 0 not checked. [2022-07-20 05:53:19,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691210312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:19,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:53:19,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 29, 29] total 71 [2022-07-20 05:53:19,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621986450] [2022-07-20 05:53:19,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:19,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-20 05:53:19,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:53:19,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-20 05:53:19,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=807, Invalid=4163, Unknown=0, NotChecked=0, Total=4970 [2022-07-20 05:53:19,073 INFO L87 Difference]: Start difference. First operand 1592 states and 1663 transitions. Second operand has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:23,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:23,467 INFO L93 Difference]: Finished difference Result 1674 states and 1735 transitions. [2022-07-20 05:53:23,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-07-20 05:53:23,468 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1353 [2022-07-20 05:53:23,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:23,471 INFO L225 Difference]: With dead ends: 1674 [2022-07-20 05:53:23,471 INFO L226 Difference]: Without dead ends: 1674 [2022-07-20 05:53:23,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2854 GetRequests, 2668 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8609 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6114, Invalid=29042, Unknown=0, NotChecked=0, Total=35156 [2022-07-20 05:53:23,473 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 214 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 6847 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 6886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 6847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:23,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 292 Invalid, 6886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 6847 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 05:53:23,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-07-20 05:53:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1664. [2022-07-20 05:53:23,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1663 states have (on average 1.0372820204449789) internal successors, (1725), 1663 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 1725 transitions. [2022-07-20 05:53:23,485 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 1725 transitions. Word has length 1353 [2022-07-20 05:53:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:23,486 INFO L495 AbstractCegarLoop]: Abstraction has 1664 states and 1725 transitions. [2022-07-20 05:53:23,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 6.197183098591549) internal successors, (440), 71 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 1725 transitions. [2022-07-20 05:53:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1394 [2022-07-20 05:53:23,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:23,498 INFO L195 NwaCegarLoop]: trace histogram [249, 249, 248, 248, 248, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-20 05:53:23,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:23,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-20 05:53:23,719 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:53:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash -524826813, now seen corresponding path program 15 times [2022-07-20 05:53:23,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:53:23,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284619294] [2022-07-20 05:53:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:23,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:53:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 74167 proven. 1595 refuted. 0 times theorem prover too weak. 84842 trivial. 0 not checked. [2022-07-20 05:53:24,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:53:24,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284619294] [2022-07-20 05:53:24,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284619294] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:24,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856540174] [2022-07-20 05:53:24,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:53:24,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:24,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:53:24,640 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) [2022-07-20 05:53:24,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 05:53:25,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-07-20 05:53:25,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:53:25,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 05:53:25,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:25,481 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:53:25,486 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 [2022-07-20 05:53:29,477 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 0 proven. 27242 refuted. 0 times theorem prover too weak. 133362 trivial. 0 not checked. [2022-07-20 05:53:29,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 160604 backedges. 0 proven. 27242 refuted. 0 times theorem prover too weak. 133362 trivial. 0 not checked. [2022-07-20 05:53:34,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856540174] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:34,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:53:34,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26, 26] total 84 [2022-07-20 05:53:34,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212485321] [2022-07-20 05:53:34,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:34,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-20 05:53:34,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:53:34,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-20 05:53:34,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1312, Invalid=5660, Unknown=0, NotChecked=0, Total=6972 [2022-07-20 05:53:34,525 INFO L87 Difference]: Start difference. First operand 1664 states and 1725 transitions. Second operand has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:39,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:39,071 INFO L93 Difference]: Finished difference Result 2063 states and 2130 transitions. [2022-07-20 05:53:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-20 05:53:39,072 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1393 [2022-07-20 05:53:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:39,076 INFO L225 Difference]: With dead ends: 2063 [2022-07-20 05:53:39,076 INFO L226 Difference]: Without dead ends: 2063 [2022-07-20 05:53:39,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2932 GetRequests, 2737 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10655 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7662, Invalid=30950, Unknown=0, NotChecked=0, Total=38612 [2022-07-20 05:53:39,079 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2371 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2371 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:39,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2371 Valid, 407 Invalid, 2820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 2311 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 05:53:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2022-07-20 05:53:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1783. [2022-07-20 05:53:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1783 states, 1782 states have (on average 1.0336700336700337) internal successors, (1842), 1782 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:39,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1783 states to 1783 states and 1842 transitions. [2022-07-20 05:53:39,093 INFO L78 Accepts]: Start accepts. Automaton has 1783 states and 1842 transitions. Word has length 1393 [2022-07-20 05:53:39,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:39,094 INFO L495 AbstractCegarLoop]: Abstraction has 1783 states and 1842 transitions. [2022-07-20 05:53:39,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 5.119047619047619) internal successors, (430), 84 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1783 states and 1842 transitions. [2022-07-20 05:53:39,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1479 [2022-07-20 05:53:39,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:39,107 INFO L195 NwaCegarLoop]: trace histogram [266, 266, 265, 265, 265, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-20 05:53:39,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-20 05:53:39,322 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,SelfDestructingSolverStorable37 [2022-07-20 05:53:39,322 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:53:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash -950517878, now seen corresponding path program 16 times [2022-07-20 05:53:39,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:53:39,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148286] [2022-07-20 05:53:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:39,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:53:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 89052 proven. 1823 refuted. 0 times theorem prover too weak. 91897 trivial. 0 not checked. [2022-07-20 05:53:40,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:53:40,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148286] [2022-07-20 05:53:40,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148286] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:40,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781683242] [2022-07-20 05:53:40,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:53:40,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:40,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:53:40,424 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) [2022-07-20 05:53:40,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 05:53:51,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:53:51,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:53:51,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 4458 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-20 05:53:51,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 153634 proven. 15588 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2022-07-20 05:53:52,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 182772 backedges. 153634 proven. 15588 refuted. 0 times theorem prover too weak. 13550 trivial. 0 not checked. [2022-07-20 05:53:53,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781683242] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:53,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:53:53,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38, 38] total 91 [2022-07-20 05:53:53,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108483936] [2022-07-20 05:53:53,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:53,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-20 05:53:53,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:53:53,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-20 05:53:53,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=6882, Unknown=0, NotChecked=0, Total=8190 [2022-07-20 05:53:53,531 INFO L87 Difference]: Start difference. First operand 1783 states and 1842 transitions. Second operand has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:54:04,357 INFO L93 Difference]: Finished difference Result 2385 states and 2423 transitions. [2022-07-20 05:54:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2022-07-20 05:54:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 0 states have call successors, (0), 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 1478 [2022-07-20 05:54:04,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:54:04,361 INFO L225 Difference]: With dead ends: 2385 [2022-07-20 05:54:04,362 INFO L226 Difference]: Without dead ends: 2385 [2022-07-20 05:54:04,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3234 GetRequests, 2902 SyntacticMatches, 0 SemanticMatches, 332 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28799 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=20878, Invalid=90344, Unknown=0, NotChecked=0, Total=111222 [2022-07-20 05:54:04,366 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 276 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 13289 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 13353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 13289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:54:04,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 360 Invalid, 13353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 13289 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-20 05:54:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2022-07-20 05:54:04,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2375. [2022-07-20 05:54:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 2374 states have (on average 1.0164279696714407) internal successors, (2413), 2374 states have internal predecessors, (2413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:04,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 2413 transitions. [2022-07-20 05:54:04,395 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 2413 transitions. Word has length 1478 [2022-07-20 05:54:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:54:04,395 INFO L495 AbstractCegarLoop]: Abstraction has 2375 states and 2413 transitions. [2022-07-20 05:54:04,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 6.868131868131868) internal successors, (625), 91 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:04,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 2413 transitions. [2022-07-20 05:54:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1554 [2022-07-20 05:54:04,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:54:04,412 INFO L195 NwaCegarLoop]: trace histogram [281, 281, 280, 280, 280, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-20 05:54:04,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-20 05:54:04,639 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,SelfDestructingSolverStorable38 [2022-07-20 05:54:04,639 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:54:04,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:54:04,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2011725613, now seen corresponding path program 17 times [2022-07-20 05:54:04,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:54:04,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707139808] [2022-07-20 05:54:04,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:54:04,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:54:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 111350 proven. 2324 refuted. 0 times theorem prover too weak. 89858 trivial. 0 not checked. [2022-07-20 05:54:05,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:54:05,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707139808] [2022-07-20 05:54:05,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707139808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:05,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110157910] [2022-07-20 05:54:05,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:54:05,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:54:05,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:54:05,779 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) [2022-07-20 05:54:05,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 05:54:10,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 55 check-sat command(s) [2022-07-20 05:54:10,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:54:10,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 4002 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 05:54:10,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:54:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 151603 proven. 16208 refuted. 0 times theorem prover too weak. 35721 trivial. 0 not checked. [2022-07-20 05:54:12,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:54:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 203532 backedges. 154575 proven. 13236 refuted. 0 times theorem prover too weak. 35721 trivial. 0 not checked. [2022-07-20 05:54:13,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110157910] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:54:13,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:54:13,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 100 [2022-07-20 05:54:13,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039600751] [2022-07-20 05:54:13,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:54:13,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-07-20 05:54:13,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:54:13,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-07-20 05:54:13,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1619, Invalid=8281, Unknown=0, NotChecked=0, Total=9900 [2022-07-20 05:54:13,402 INFO L87 Difference]: Start difference. First operand 2375 states and 2413 transitions. Second operand has 100 states, 100 states have (on average 5.73) internal successors, (573), 100 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:54:20,250 INFO L93 Difference]: Finished difference Result 2564 states and 2596 transitions. [2022-07-20 05:54:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-07-20 05:54:20,251 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 5.73) internal successors, (573), 100 states have internal predecessors, (573), 0 states have call successors, (0), 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 1553 [2022-07-20 05:54:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:54:20,272 INFO L225 Difference]: With dead ends: 2564 [2022-07-20 05:54:20,278 INFO L226 Difference]: Without dead ends: 2564 [2022-07-20 05:54:20,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3337 GetRequests, 3047 SyntacticMatches, 0 SemanticMatches, 290 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21645 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=15727, Invalid=69245, Unknown=0, NotChecked=0, Total=84972 [2022-07-20 05:54:20,288 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 316 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 11164 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 11241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 11164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:54:20,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 375 Invalid, 11241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 11164 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 05:54:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2564 states. [2022-07-20 05:54:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2564 to 2554. [2022-07-20 05:54:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 1.0129259694477086) internal successors, (2586), 2553 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:20,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 2586 transitions. [2022-07-20 05:54:20,327 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 2586 transitions. Word has length 1553 [2022-07-20 05:54:20,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:54:20,328 INFO L495 AbstractCegarLoop]: Abstraction has 2554 states and 2586 transitions. [2022-07-20 05:54:20,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 5.73) internal successors, (573), 100 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 2586 transitions. [2022-07-20 05:54:20,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1569 [2022-07-20 05:54:20,363 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:54:20,364 INFO L195 NwaCegarLoop]: trace histogram [284, 284, 283, 283, 283, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-20 05:54:20,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 05:54:20,564 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,SelfDestructingSolverStorable39 [2022-07-20 05:54:20,564 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:54:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:54:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash -595969838, now seen corresponding path program 18 times [2022-07-20 05:54:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:54:20,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135062359] [2022-07-20 05:54:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:54:20,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:54:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 207819 backedges. 114502 proven. 2597 refuted. 0 times theorem prover too weak. 90720 trivial. 0 not checked. [2022-07-20 05:54:21,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:54:21,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135062359] [2022-07-20 05:54:21,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135062359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:21,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715145374] [2022-07-20 05:54:21,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:54:21,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:54:21,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:54:21,758 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) [2022-07-20 05:54:21,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 05:54:25,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2022-07-20 05:54:25,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:54:25,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 3359 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 05:54:25,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:54:25,582 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:54:25,582 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 [2022-07-20 05:54:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 207819 backedges. 28088 proven. 43074 refuted. 0 times theorem prover too weak. 136657 trivial. 0 not checked. [2022-07-20 05:54:30,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:54:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 207819 backedges. 0 proven. 71162 refuted. 0 times theorem prover too weak. 136657 trivial. 0 not checked. [2022-07-20 05:54:36,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715145374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:54:36,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:54:36,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 32, 32] total 104 [2022-07-20 05:54:36,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259366575] [2022-07-20 05:54:36,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:54:36,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-20 05:54:36,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:54:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-20 05:54:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1922, Invalid=8790, Unknown=0, NotChecked=0, Total=10712 [2022-07-20 05:54:36,116 INFO L87 Difference]: Start difference. First operand 2554 states and 2586 transitions. Second operand has 104 states, 104 states have (on average 4.9423076923076925) internal successors, (514), 104 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:54:47,478 INFO L93 Difference]: Finished difference Result 3232 states and 3297 transitions. [2022-07-20 05:54:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 245 states. [2022-07-20 05:54:47,479 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.9423076923076925) internal successors, (514), 104 states have internal predecessors, (514), 0 states have call successors, (0), 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 1568 [2022-07-20 05:54:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:54:47,484 INFO L225 Difference]: With dead ends: 3232 [2022-07-20 05:54:47,485 INFO L226 Difference]: Without dead ends: 3232 [2022-07-20 05:54:47,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3419 GetRequests, 3075 SyntacticMatches, 0 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37459 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=19916, Invalid=99454, Unknown=0, NotChecked=0, Total=119370 [2022-07-20 05:54:47,489 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5673 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 3853 mSolverCounterSat, 1210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5673 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 5063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1210 IncrementalHoareTripleChecker+Valid, 3853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:54:47,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5673 Valid, 490 Invalid, 5063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1210 Valid, 3853 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 05:54:47,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2022-07-20 05:54:47,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 2955. [2022-07-20 05:54:47,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 1.0159106296547056) internal successors, (3001), 2954 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3001 transitions. [2022-07-20 05:54:47,511 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3001 transitions. Word has length 1568 [2022-07-20 05:54:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:54:47,512 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 3001 transitions. [2022-07-20 05:54:47,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.9423076923076925) internal successors, (514), 104 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3001 transitions. [2022-07-20 05:54:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1883 [2022-07-20 05:54:47,534 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:54:47,535 INFO L195 NwaCegarLoop]: trace histogram [344, 344, 343, 343, 343, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1] [2022-07-20 05:54:47,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-20 05:54:47,755 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,SelfDestructingSolverStorable40 [2022-07-20 05:54:47,755 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:54:47,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:54:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1136406914, now seen corresponding path program 19 times [2022-07-20 05:54:47,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:54:47,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402632539] [2022-07-20 05:54:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:54:47,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:54:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 231234 proven. 20637 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2022-07-20 05:54:49,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:54:49,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402632539] [2022-07-20 05:54:49,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402632539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:49,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009154263] [2022-07-20 05:54:49,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:54:49,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:54:49,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:54:49,315 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) [2022-07-20 05:54:49,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 05:54:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 5616 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 05:54:50,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:54:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 232493 proven. 19378 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2022-07-20 05:54:51,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:54:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 304000 backedges. 232493 proven. 19378 refuted. 0 times theorem prover too weak. 52129 trivial. 0 not checked. [2022-07-20 05:54:52,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009154263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:54:52,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:54:52,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 82 [2022-07-20 05:54:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396685903] [2022-07-20 05:54:52,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:54:52,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-20 05:54:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:54:52,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-20 05:54:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1362, Invalid=5280, Unknown=0, NotChecked=0, Total=6642 [2022-07-20 05:54:52,840 INFO L87 Difference]: Start difference. First operand 2955 states and 3001 transitions. Second operand has 82 states, 82 states have (on average 6.524390243902439) internal successors, (535), 82 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:54:57,820 INFO L93 Difference]: Finished difference Result 2955 states and 3000 transitions. [2022-07-20 05:54:57,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2022-07-20 05:54:57,821 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 6.524390243902439) internal successors, (535), 82 states have internal predecessors, (535), 0 states have call successors, (0), 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 1882 [2022-07-20 05:54:57,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:54:57,827 INFO L225 Difference]: With dead ends: 2955 [2022-07-20 05:54:57,827 INFO L226 Difference]: Without dead ends: 2955 [2022-07-20 05:54:57,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4020 GetRequests, 3723 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27163 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=23982, Invalid=65120, Unknown=0, NotChecked=0, Total=89102 [2022-07-20 05:54:57,834 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 199 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:54:57,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 445 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 05:54:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-07-20 05:54:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2955. [2022-07-20 05:54:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2954 states have (on average 1.015572105619499) internal successors, (3000), 2954 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 3000 transitions. [2022-07-20 05:54:57,855 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 3000 transitions. Word has length 1882 [2022-07-20 05:54:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:54:57,856 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 3000 transitions. [2022-07-20 05:54:57,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 6.524390243902439) internal successors, (535), 82 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 3000 transitions. [2022-07-20 05:54:57,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1888 [2022-07-20 05:54:57,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:54:57,917 INFO L195 NwaCegarLoop]: trace histogram [345, 345, 344, 344, 344, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1] [2022-07-20 05:54:57,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-20 05:54:58,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:54:58,131 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:54:58,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:54:58,132 INFO L85 PathProgramCache]: Analyzing trace with hash -87602005, now seen corresponding path program 20 times [2022-07-20 05:54:58,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:54:58,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487330813] [2022-07-20 05:54:58,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:54:58,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:54:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 119020 proven. 158286 refuted. 0 times theorem prover too weak. 28435 trivial. 0 not checked. [2022-07-20 05:54:59,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:54:59,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487330813] [2022-07-20 05:54:59,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487330813] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:59,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259309718] [2022-07-20 05:54:59,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:54:59,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:54:59,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:54:59,627 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:54:59,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 05:55:00,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:55:00,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:55:00,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 5630 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 05:55:00,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 120715 proven. 155685 refuted. 0 times theorem prover too weak. 29341 trivial. 0 not checked. [2022-07-20 05:55:02,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 305741 backedges. 120715 proven. 155685 refuted. 0 times theorem prover too weak. 29341 trivial. 0 not checked. [2022-07-20 05:55:03,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259309718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:55:03,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:55:03,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 94 [2022-07-20 05:55:03,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767198744] [2022-07-20 05:55:03,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:55:03,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-07-20 05:55:03,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:55:03,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-07-20 05:55:03,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1728, Invalid=7014, Unknown=0, NotChecked=0, Total=8742 [2022-07-20 05:55:03,429 INFO L87 Difference]: Start difference. First operand 2955 states and 3000 transitions. Second operand has 94 states, 94 states have (on average 6.468085106382978) internal successors, (608), 94 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:09,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:09,565 INFO L93 Difference]: Finished difference Result 2017 states and 2052 transitions. [2022-07-20 05:55:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2022-07-20 05:55:09,566 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 6.468085106382978) internal successors, (608), 94 states have internal predecessors, (608), 0 states have call successors, (0), 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 1887 [2022-07-20 05:55:09,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:09,570 INFO L225 Difference]: With dead ends: 2017 [2022-07-20 05:55:09,570 INFO L226 Difference]: Without dead ends: 2017 [2022-07-20 05:55:09,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4115 GetRequests, 3727 SyntacticMatches, 1 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61975 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=31328, Invalid=119604, Unknown=0, NotChecked=0, Total=150932 [2022-07-20 05:55:09,582 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 1540 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 4546 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1540 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 4923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 4546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:09,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1540 Valid, 274 Invalid, 4923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 4546 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 05:55:09,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2022-07-20 05:55:09,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 2005. [2022-07-20 05:55:09,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 1.0179640718562875) internal successors, (2040), 2004 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:09,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 2040 transitions. [2022-07-20 05:55:09,595 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 2040 transitions. Word has length 1887 [2022-07-20 05:55:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:09,596 INFO L495 AbstractCegarLoop]: Abstraction has 2005 states and 2040 transitions. [2022-07-20 05:55:09,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 6.468085106382978) internal successors, (608), 94 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:09,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 2040 transitions. [2022-07-20 05:55:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2000 [2022-07-20 05:55:09,617 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:09,617 INFO L195 NwaCegarLoop]: trace histogram [366, 366, 365, 365, 365, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1] [2022-07-20 05:55:09,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-20 05:55:09,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-07-20 05:55:09,842 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:55:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:09,842 INFO L85 PathProgramCache]: Analyzing trace with hash 829353423, now seen corresponding path program 21 times [2022-07-20 05:55:09,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:55:09,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833545811] [2022-07-20 05:55:09,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:09,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:55:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:11,272 INFO L134 CoverageAnalysis]: Checked inductivity of 343985 backedges. 275712 proven. 27412 refuted. 0 times theorem prover too weak. 40861 trivial. 0 not checked. [2022-07-20 05:55:11,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:55:11,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833545811] [2022-07-20 05:55:11,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833545811] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:11,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005314482] [2022-07-20 05:55:11,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:55:11,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:55:11,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:55:11,275 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:55:11,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 05:55:19,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2022-07-20 05:55:19,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:55:19,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 3078 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-20 05:55:19,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 343985 backedges. 162807 proven. 37872 refuted. 0 times theorem prover too weak. 143306 trivial. 0 not checked. [2022-07-20 05:55:22,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 343985 backedges. 161890 proven. 38789 refuted. 0 times theorem prover too weak. 143306 trivial. 0 not checked. [2022-07-20 05:55:25,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005314482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:55:25,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:55:25,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 56, 56] total 147 [2022-07-20 05:55:25,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787113467] [2022-07-20 05:55:25,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:55:25,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-07-20 05:55:25,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:55:25,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-07-20 05:55:25,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2808, Invalid=18654, Unknown=0, NotChecked=0, Total=21462 [2022-07-20 05:55:25,125 INFO L87 Difference]: Start difference. First operand 2005 states and 2040 transitions. Second operand has 147 states, 147 states have (on average 6.0272108843537415) internal successors, (886), 147 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:42,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:42,717 INFO L93 Difference]: Finished difference Result 2428 states and 2464 transitions. [2022-07-20 05:55:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 430 states. [2022-07-20 05:55:42,718 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 6.0272108843537415) internal successors, (886), 147 states have internal predecessors, (886), 0 states have call successors, (0), 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 1999 [2022-07-20 05:55:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:42,742 INFO L225 Difference]: With dead ends: 2428 [2022-07-20 05:55:42,742 INFO L226 Difference]: Without dead ends: 2428 [2022-07-20 05:55:42,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4467 GetRequests, 3897 SyntacticMatches, 0 SemanticMatches, 570 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107195 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=41332, Invalid=285280, Unknown=0, NotChecked=0, Total=326612 [2022-07-20 05:55:42,762 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 3907 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 20721 mSolverCounterSat, 925 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3907 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 21646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 925 IncrementalHoareTripleChecker+Valid, 20721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:42,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3907 Valid, 765 Invalid, 21646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [925 Valid, 20721 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-07-20 05:55:42,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2428 states. [2022-07-20 05:55:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2428 to 2386. [2022-07-20 05:55:42,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2385 states have (on average 1.0155136268343816) internal successors, (2422), 2385 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 2422 transitions. [2022-07-20 05:55:42,811 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 2422 transitions. Word has length 1999 [2022-07-20 05:55:42,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:42,811 INFO L495 AbstractCegarLoop]: Abstraction has 2386 states and 2422 transitions. [2022-07-20 05:55:42,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 6.0272108843537415) internal successors, (886), 147 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:42,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 2422 transitions. [2022-07-20 05:55:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2239 [2022-07-20 05:55:42,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:42,859 INFO L195 NwaCegarLoop]: trace histogram [411, 411, 410, 410, 410, 27, 26, 26, 26, 26, 26, 26, 1, 1, 1] [2022-07-20 05:55:42,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-20 05:55:43,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:55:43,079 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:55:43,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:43,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1177943594, now seen corresponding path program 22 times [2022-07-20 05:55:43,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:55:43,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742261044] [2022-07-20 05:55:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:43,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:55:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 433442 backedges. 231759 proven. 3839 refuted. 0 times theorem prover too weak. 197844 trivial. 0 not checked. [2022-07-20 05:55:44,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:55:44,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742261044] [2022-07-20 05:55:44,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742261044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:44,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204064593] [2022-07-20 05:55:44,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:55:44,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:55:44,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:55:44,926 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:55:44,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 05:56:08,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:56:08,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:56:08,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 6653 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 05:56:08,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:56:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 433442 backedges. 3332 proven. 413087 refuted. 0 times theorem prover too weak. 17023 trivial. 0 not checked. [2022-07-20 05:56:13,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:56:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 433442 backedges. 3332 proven. 413087 refuted. 0 times theorem prover too weak. 17023 trivial. 0 not checked. [2022-07-20 05:56:16,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204064593] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:56:16,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:56:16,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 62, 62] total 147 [2022-07-20 05:56:16,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270192445] [2022-07-20 05:56:16,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:56:16,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-07-20 05:56:16,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:56:16,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-07-20 05:56:16,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2964, Invalid=18498, Unknown=0, NotChecked=0, Total=21462 [2022-07-20 05:56:16,717 INFO L87 Difference]: Start difference. First operand 2386 states and 2422 transitions. Second operand has 147 states, 147 states have (on average 6.408163265306122) internal successors, (942), 147 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)