./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --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/array-memsafety/openbsd_cstrspn-alloca-2.i -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 e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:27:49,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:27:49,546 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:27:49,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:27:49,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:27:49,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:27:49,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:27:49,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:27:49,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:27:49,603 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:27:49,604 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:27:49,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:27:49,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:27:49,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:27:49,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:27:49,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:27:49,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:27:49,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:27:49,624 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:27:49,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:27:49,632 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:27:49,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:27:49,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:27:49,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:27:49,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:27:49,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:27:49,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:27:49,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:27:49,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:27:49,648 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:27:49,649 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:27:49,649 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:27:49,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:27:49,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:27:49,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:27:49,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:27:49,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:27:49,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:27:49,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:27:49,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:27:49,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:27:49,657 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:27:49,659 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:27:49,687 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:27:49,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:27:49,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:27:49,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:27:49,689 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:27:49,689 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:27:49,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:27:49,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:27:49,690 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:27:49,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:27:49,691 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:27:49,692 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:27:49,692 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:27:49,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:27:49,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:27:49,692 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:27:49,692 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:27:49,693 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:27:49,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:27:49,694 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:27:49,695 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:27:49,695 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:27:49,695 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:27:49,695 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:27:49,695 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:27:49,696 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:27:49,696 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:27:49,696 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:27:49,696 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:27:49,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:27:49,697 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2022-07-20 05:27:49,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:27:49,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:27:49,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:27:49,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:27:49,966 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:27:49,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2022-07-20 05:27:50,023 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b1e86f93/723c4d4ccc02414d97a7e4a2742d74cd/FLAGf72c77953 [2022-07-20 05:27:50,539 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:27:50,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2022-07-20 05:27:50,551 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b1e86f93/723c4d4ccc02414d97a7e4a2742d74cd/FLAGf72c77953 [2022-07-20 05:27:51,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b1e86f93/723c4d4ccc02414d97a7e4a2742d74cd [2022-07-20 05:27:51,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:27:51,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:27:51,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:27:51,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:27:51,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:27:51,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35af57c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51, skipping insertion in model container [2022-07-20 05:27:51,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:27:51,083 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:27:51,269 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:27:51,275 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:27:51,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:27:51,333 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:27:51,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51 WrapperNode [2022-07-20 05:27:51,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:27:51,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:27:51,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:27:51,338 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:27:51,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,402 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-07-20 05:27:51,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:27:51,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:27:51,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:27:51,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:27:51,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:27:51,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:27:51,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:27:51,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:27:51,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (1/1) ... [2022-07-20 05:27:51,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:27:51,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:51,479 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 05:27:51,484 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 05:27:51,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:27:51,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:27:51,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:27:51,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:27:51,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:27:51,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:27:51,594 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:27:51,596 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:27:51,755 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:27:51,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:27:51,760 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 05:27:51,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:27:51 BoogieIcfgContainer [2022-07-20 05:27:51,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:27:51,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:27:51,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:27:51,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:27:51,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:27:51" (1/3) ... [2022-07-20 05:27:51,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47168f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:27:51, skipping insertion in model container [2022-07-20 05:27:51,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:27:51" (2/3) ... [2022-07-20 05:27:51,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47168f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:27:51, skipping insertion in model container [2022-07-20 05:27:51,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:27:51" (3/3) ... [2022-07-20 05:27:51,770 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2022-07-20 05:27:51,783 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:27:51,783 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-07-20 05:27:51,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:27:51,856 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@1e1a048d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@294cf9dc [2022-07-20 05:27:51,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-07-20 05:27:51,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 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 05:27:51,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:27:51,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:51,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:51,874 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-20 05:27:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:51,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266885474] [2022-07-20 05:27:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:51,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:52,082 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 05:27:52,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:52,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266885474] [2022-07-20 05:27:52,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266885474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:52,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:52,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:27:52,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838053775] [2022-07-20 05:27:52,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:52,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:27:52,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:52,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:27:52,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:27:52,125 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 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) 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 05:27:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:52,192 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-07-20 05:27:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:27:52,195 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 05:27:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:52,204 INFO L225 Difference]: With dead ends: 78 [2022-07-20 05:27:52,204 INFO L226 Difference]: Without dead ends: 74 [2022-07-20 05:27:52,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 05:27:52,214 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:52,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:52,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-20 05:27:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2022-07-20 05:27:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 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 05:27:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-07-20 05:27:52,261 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2022-07-20 05:27:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:52,262 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-07-20 05:27:52,262 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 05:27:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-07-20 05:27:52,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:27:52,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:52,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:52,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:27:52,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:52,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-20 05:27:52,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:52,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021800175] [2022-07-20 05:27:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:52,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:52,352 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 05:27:52,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:52,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021800175] [2022-07-20 05:27:52,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021800175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:52,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:52,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:27:52,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155947203] [2022-07-20 05:27:52,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:52,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:27:52,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:52,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:27:52,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:27:52,359 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:52,404 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2022-07-20 05:27:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:27:52,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:27:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:52,407 INFO L225 Difference]: With dead ends: 42 [2022-07-20 05:27:52,407 INFO L226 Difference]: Without dead ends: 42 [2022-07-20 05:27:52,411 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 05:27:52,413 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 34 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:52,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-20 05:27:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-20 05:27:52,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 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 05:27:52,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-20 05:27:52,426 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2022-07-20 05:27:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:52,426 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-20 05:27:52,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-20 05:27:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:27:52,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:52,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:52,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:27:52,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:52,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:52,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-20 05:27:52,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247559459] [2022-07-20 05:27:52,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:52,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:52,500 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 05:27:52,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:52,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247559459] [2022-07-20 05:27:52,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247559459] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:52,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:52,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:27:52,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391101244] [2022-07-20 05:27:52,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:52,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:27:52,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:52,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:27:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:27:52,503 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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 05:27:52,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:52,628 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-07-20 05:27:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:27:52,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 05:27:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:52,631 INFO L225 Difference]: With dead ends: 75 [2022-07-20 05:27:52,631 INFO L226 Difference]: Without dead ends: 75 [2022-07-20 05:27:52,631 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 05:27:52,638 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:52,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:27:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-20 05:27:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2022-07-20 05:27:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 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 05:27:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-07-20 05:27:52,649 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2022-07-20 05:27:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:52,649 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-07-20 05:27:52,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 05:27:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-07-20 05:27:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:27:52,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:52,650 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:52,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 05:27:52,651 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:52,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:52,654 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-20 05:27:52,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:52,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142911061] [2022-07-20 05:27:52,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:52,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:52,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:52,772 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 05:27:52,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:52,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142911061] [2022-07-20 05:27:52,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142911061] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:52,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:52,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:27:52,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881569800] [2022-07-20 05:27:52,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:52,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:27:52,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:27:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:27:52,776 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 05:27:52,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:52,857 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-07-20 05:27:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:27:52,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-20 05:27:52,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:52,859 INFO L225 Difference]: With dead ends: 72 [2022-07-20 05:27:52,859 INFO L226 Difference]: Without dead ends: 72 [2022-07-20 05:27:52,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:27:52,860 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 94 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:52,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 121 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:27:52,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-20 05:27:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2022-07-20 05:27:52,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-20 05:27:52,864 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 9 [2022-07-20 05:27:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:52,865 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-20 05:27:52,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 05:27:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-20 05:27:52,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:27:52,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:52,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:52,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 05:27:52,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:52,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-20 05:27:52,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:52,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499416333] [2022-07-20 05:27:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:52,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:52,916 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 05:27:52,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:52,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499416333] [2022-07-20 05:27:52,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499416333] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:52,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:52,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:27:52,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203471640] [2022-07-20 05:27:52,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:52,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:27:52,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:52,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:27:52,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:27:52,919 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 05:27:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:52,940 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2022-07-20 05:27:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:27:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-20 05:27:52,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:52,942 INFO L225 Difference]: With dead ends: 87 [2022-07-20 05:27:52,942 INFO L226 Difference]: Without dead ends: 87 [2022-07-20 05:27:52,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 05:27:52,943 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 30 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:52,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 108 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-20 05:27:52,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2022-07-20 05:27:52,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 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 05:27:52,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-20 05:27:52,948 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2022-07-20 05:27:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:52,948 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-20 05:27:52,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 05:27:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-20 05:27:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:27:52,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:52,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:52,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 05:27:52,950 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:52,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:52,951 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-20 05:27:52,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:52,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870965518] [2022-07-20 05:27:52,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:52,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:52,978 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 05:27:52,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:52,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870965518] [2022-07-20 05:27:52,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870965518] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:52,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:52,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:27:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463686459] [2022-07-20 05:27:52,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:52,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:27:52,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:27:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:27:52,981 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 05:27:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:52,998 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-07-20 05:27:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:27:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-20 05:27:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:53,000 INFO L225 Difference]: With dead ends: 61 [2022-07-20 05:27:53,000 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 05:27:53,000 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 05:27:53,001 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:53,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 05:27:53,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-20 05:27:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 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 05:27:53,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-07-20 05:27:53,006 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2022-07-20 05:27:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:53,006 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-07-20 05:27:53,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 05:27:53,006 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-07-20 05:27:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:27:53,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:53,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:53,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 05:27:53,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:53,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:53,009 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-20 05:27:53,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:53,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938321207] [2022-07-20 05:27:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:53,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:53,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:53,069 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 05:27:53,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:53,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938321207] [2022-07-20 05:27:53,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938321207] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:53,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:53,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:27:53,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720293843] [2022-07-20 05:27:53,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:53,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:27:53,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:53,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:27:53,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:27:53,072 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 05:27:53,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:53,143 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2022-07-20 05:27:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:27:53,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-20 05:27:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:53,144 INFO L225 Difference]: With dead ends: 91 [2022-07-20 05:27:53,145 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 05:27:53,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:27:53,146 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:53,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 70 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:27:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 05:27:53,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2022-07-20 05:27:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 64 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:53,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2022-07-20 05:27:53,150 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 9 [2022-07-20 05:27:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:53,151 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2022-07-20 05:27:53,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 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 05:27:53,151 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2022-07-20 05:27:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 05:27:53,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:53,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:53,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 05:27:53,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:53,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:53,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-07-20 05:27:53,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:53,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917130134] [2022-07-20 05:27:53,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:53,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:53,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:53,249 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 05:27:53,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:53,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917130134] [2022-07-20 05:27:53,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917130134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:53,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:53,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:27:53,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054543414] [2022-07-20 05:27:53,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:53,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:27:53,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:53,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:27:53,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:27:53,253 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 05:27:53,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:53,303 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2022-07-20 05:27:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:27:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-07-20 05:27:53,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:53,305 INFO L225 Difference]: With dead ends: 64 [2022-07-20 05:27:53,305 INFO L226 Difference]: Without dead ends: 64 [2022-07-20 05:27:53,305 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 05:27:53,306 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:53,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:53,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-20 05:27:53,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2022-07-20 05:27:53,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 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 05:27:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-07-20 05:27:53,310 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 9 [2022-07-20 05:27:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:53,310 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-07-20 05:27:53,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 05:27:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-07-20 05:27:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:27:53,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:53,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:53,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 05:27:53,312 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:53,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:53,313 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-20 05:27:53,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:53,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143210137] [2022-07-20 05:27:53,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:53,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:53,352 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 05:27:53,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143210137] [2022-07-20 05:27:53,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143210137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:53,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:53,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:27:53,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938521269] [2022-07-20 05:27:53,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:53,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:27:53,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:27:53,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:27:53,355 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:53,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:53,376 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-07-20 05:27:53,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:27:53,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:27:53,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:53,377 INFO L225 Difference]: With dead ends: 53 [2022-07-20 05:27:53,377 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 05:27:53,378 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 05:27:53,378 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:53,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 05:27:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-20 05:27:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.391304347826087) internal successors, (64), 52 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 05:27:53,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-07-20 05:27:53,382 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 10 [2022-07-20 05:27:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:53,382 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-07-20 05:27:53,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:53,382 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-07-20 05:27:53,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:27:53,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:53,383 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:53,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 05:27:53,384 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:53,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-20 05:27:53,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:53,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517533434] [2022-07-20 05:27:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:53,444 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 05:27:53,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:53,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517533434] [2022-07-20 05:27:53,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517533434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:53,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090864351] [2022-07-20 05:27:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:53,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:53,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:53,451 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 05:27:53,456 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 05:27:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:53,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:27:53,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:53,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:27:53,579 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 05:27:53,586 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 05:27:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:27:53,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:27:53,830 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 05:27:53,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090864351] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:27:53,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:27:53,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-20 05:27:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999840585] [2022-07-20 05:27:53,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:27:53,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:27:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:27:53,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:27:53,833 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 05:27:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:54,006 INFO L93 Difference]: Finished difference Result 116 states and 134 transitions. [2022-07-20 05:27:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:27:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 05:27:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:54,008 INFO L225 Difference]: With dead ends: 116 [2022-07-20 05:27:54,008 INFO L226 Difference]: Without dead ends: 116 [2022-07-20 05:27:54,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:27:54,009 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 144 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:54,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 191 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:27:54,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-20 05:27:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 48. [2022-07-20 05:27:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 47 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 05:27:54,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-20 05:27:54,013 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 11 [2022-07-20 05:27:54,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:54,013 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-20 05:27:54,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 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 05:27:54,013 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-20 05:27:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:27:54,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:54,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:54,035 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 05:27:54,219 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,SelfDestructingSolverStorable9 [2022-07-20 05:27:54,220 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2022-07-20 05:27:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:54,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914004390] [2022-07-20 05:27:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:54,284 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 05:27:54,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:54,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914004390] [2022-07-20 05:27:54,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914004390] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:54,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:54,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:27:54,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700564598] [2022-07-20 05:27:54,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:54,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:27:54,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:27:54,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:27:54,287 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 05:27:54,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:54,326 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2022-07-20 05:27:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:27:54,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-07-20 05:27:54,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:54,327 INFO L225 Difference]: With dead ends: 47 [2022-07-20 05:27:54,327 INFO L226 Difference]: Without dead ends: 47 [2022-07-20 05:27:54,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:27:54,328 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:54,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 67 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-20 05:27:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-20 05:27:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.3095238095238095) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-20 05:27:54,331 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 13 [2022-07-20 05:27:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:54,332 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-20 05:27:54,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 05:27:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-20 05:27:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:27:54,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:54,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:54,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 05:27:54,333 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:54,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:54,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2022-07-20 05:27:54,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:54,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6444336] [2022-07-20 05:27:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:54,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:54,402 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 05:27:54,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:54,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6444336] [2022-07-20 05:27:54,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6444336] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:54,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:54,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 05:27:54,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939529856] [2022-07-20 05:27:54,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:54,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:27:54,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:54,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:27:54,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:27:54,405 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 05:27:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:54,478 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-20 05:27:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:27:54,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2022-07-20 05:27:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:54,480 INFO L225 Difference]: With dead ends: 50 [2022-07-20 05:27:54,480 INFO L226 Difference]: Without dead ends: 50 [2022-07-20 05:27:54,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:27:54,481 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:54,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 78 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-20 05:27:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-20 05:27:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 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 05:27:54,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-07-20 05:27:54,488 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 13 [2022-07-20 05:27:54,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:54,489 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-07-20 05:27:54,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 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 05:27:54,489 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-07-20 05:27:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:27:54,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:54,491 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:54,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 05:27:54,491 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-20 05:27:54,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:54,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847914060] [2022-07-20 05:27:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:54,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:54,575 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 05:27:54,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847914060] [2022-07-20 05:27:54,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847914060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:54,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481629086] [2022-07-20 05:27:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:54,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:54,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:54,578 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 05:27:54,580 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 05:27:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:54,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:27:54,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:54,647 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:27:54,647 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 05:27:54,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:27:54,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:27:54,851 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 05:27:54,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481629086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:27:54,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:27:54,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-20 05:27:54,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608840298] [2022-07-20 05:27:54,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:27:54,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 05:27:54,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:54,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 05:27:54,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:27:54,853 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 05:27:54,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:54,969 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-07-20 05:27:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:27:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 13 [2022-07-20 05:27:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:54,971 INFO L225 Difference]: With dead ends: 91 [2022-07-20 05:27:54,971 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 05:27:54,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:27:54,972 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 139 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:54,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 173 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:27:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 05:27:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 46. [2022-07-20 05:27:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 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 05:27:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-20 05:27:54,974 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2022-07-20 05:27:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:54,975 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-20 05:27:54,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 05:27:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-20 05:27:54,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:27:54,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:54,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:55,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-20 05:27:55,194 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,SelfDestructingSolverStorable12 [2022-07-20 05:27:55,194 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:55,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2022-07-20 05:27:55,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:55,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35369254] [2022-07-20 05:27:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:55,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:55,232 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 05:27:55,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:55,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35369254] [2022-07-20 05:27:55,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35369254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:55,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:55,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:27:55,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498936037] [2022-07-20 05:27:55,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:55,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:27:55,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:55,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:27:55,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:27:55,234 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 05:27:55,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:55,283 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-07-20 05:27:55,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:27:55,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-07-20 05:27:55,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:55,286 INFO L225 Difference]: With dead ends: 46 [2022-07-20 05:27:55,287 INFO L226 Difference]: Without dead ends: 46 [2022-07-20 05:27:55,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:27:55,288 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:55,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-20 05:27:55,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-07-20 05:27:55,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:27:55,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-07-20 05:27:55,290 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2022-07-20 05:27:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:55,290 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-07-20 05:27:55,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 05:27:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-07-20 05:27:55,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 05:27:55,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:55,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:55,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 05:27:55,294 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:55,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2022-07-20 05:27:55,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:55,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143051119] [2022-07-20 05:27:55,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:55,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:55,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:55,395 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 05:27:55,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:55,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143051119] [2022-07-20 05:27:55,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143051119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:55,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:55,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:27:55,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282641665] [2022-07-20 05:27:55,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:55,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:27:55,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:55,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:27:55,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:27:55,398 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 05:27:55,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:55,474 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-20 05:27:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:27:55,475 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2022-07-20 05:27:55,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:55,476 INFO L225 Difference]: With dead ends: 49 [2022-07-20 05:27:55,476 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 05:27:55,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:27:55,478 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 57 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:55,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 88 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 05:27:55,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-07-20 05:27:55,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 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 05:27:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-07-20 05:27:55,481 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2022-07-20 05:27:55,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:55,482 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-07-20 05:27:55,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 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 05:27:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-07-20 05:27:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 05:27:55,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:55,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:55,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 05:27:55,484 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:55,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:55,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2022-07-20 05:27:55,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:55,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359710082] [2022-07-20 05:27:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:55,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:55,585 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 05:27:55,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:55,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359710082] [2022-07-20 05:27:55,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359710082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:55,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:55,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:27:55,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474432167] [2022-07-20 05:27:55,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:55,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:27:55,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:55,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:27:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:27:55,588 INFO L87 Difference]: Start difference. First operand 47 states and 54 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 05:27:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:55,602 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-07-20 05:27:55,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:27:55,603 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 21 [2022-07-20 05:27:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:55,603 INFO L225 Difference]: With dead ends: 46 [2022-07-20 05:27:55,603 INFO L226 Difference]: Without dead ends: 43 [2022-07-20 05:27:55,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:27:55,604 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 15 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 52 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 05:27:55,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 52 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:27:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-20 05:27:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-20 05:27:55,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 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 05:27:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-20 05:27:55,608 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2022-07-20 05:27:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:55,609 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-20 05:27:55,609 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 05:27:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-20 05:27:55,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 05:27:55,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:55,610 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:55,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 05:27:55,611 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:55,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2022-07-20 05:27:55,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:55,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407955922] [2022-07-20 05:27:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:55,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:27:55,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:55,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407955922] [2022-07-20 05:27:55,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407955922] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:55,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:55,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-20 05:27:55,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981459280] [2022-07-20 05:27:55,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:55,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:27:55,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:55,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:27:55,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:27:55,725 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 05:27:55,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:55,857 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-20 05:27:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:27:55,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 21 [2022-07-20 05:27:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:55,858 INFO L225 Difference]: With dead ends: 53 [2022-07-20 05:27:55,858 INFO L226 Difference]: Without dead ends: 34 [2022-07-20 05:27:55,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:27:55,859 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 39 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:55,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 173 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:27:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-20 05:27:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-20 05:27:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.1875) 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 05:27:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-07-20 05:27:55,861 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2022-07-20 05:27:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:55,861 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-07-20 05:27:55,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 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 05:27:55,862 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-07-20 05:27:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 05:27:55,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:55,862 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:55,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 05:27:55,863 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:55,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:55,863 INFO L85 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2022-07-20 05:27:55,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:55,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072154912] [2022-07-20 05:27:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:55,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:27:55,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:55,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072154912] [2022-07-20 05:27:55,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072154912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:55,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:55,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-20 05:27:55,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054201608] [2022-07-20 05:27:55,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:55,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:27:55,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:27:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:27:55,995 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 05:27:56,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:56,133 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-07-20 05:27:56,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:27:56,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 21 [2022-07-20 05:27:56,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:56,134 INFO L225 Difference]: With dead ends: 48 [2022-07-20 05:27:56,134 INFO L226 Difference]: Without dead ends: 38 [2022-07-20 05:27:56,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:27:56,135 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:56,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 150 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:27:56,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-20 05:27:56,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-07-20 05:27:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 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 05:27:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-07-20 05:27:56,136 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2022-07-20 05:27:56,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:56,137 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-07-20 05:27:56,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 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 05:27:56,137 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-07-20 05:27:56,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:27:56,137 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:56,137 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:56,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 05:27:56,137 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:56,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:56,138 INFO L85 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2022-07-20 05:27:56,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:56,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591512806] [2022-07-20 05:27:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:56,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:56,271 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 05:27:56,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:56,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591512806] [2022-07-20 05:27:56,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591512806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:56,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877802515] [2022-07-20 05:27:56,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:56,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:56,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:56,274 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 05:27:56,285 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 05:27:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:27:56,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:56,465 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 05:27:56,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:27:56,622 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 5 treesize of output 3 [2022-07-20 05:27:56,640 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 05:27:56,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877802515] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:27:56,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:27:56,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-07-20 05:27:56,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443083536] [2022-07-20 05:27:56,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:27:56,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 05:27:56,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:56,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 05:27:56,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:27:56,643 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 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 05:27:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:56,992 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-07-20 05:27:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:27:56,993 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 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) Word has length 25 [2022-07-20 05:27:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:56,993 INFO L225 Difference]: With dead ends: 49 [2022-07-20 05:27:56,994 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 05:27:56,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:27:56,994 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 180 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:56,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 212 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:27:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 05:27:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-07-20 05:27:56,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 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 05:27:56,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-07-20 05:27:56,996 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2022-07-20 05:27:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:56,996 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-07-20 05:27:56,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 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 05:27:56,997 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-07-20 05:27:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:27:56,997 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:56,997 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:57,026 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 05:27:57,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:57,205 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:57,205 INFO L85 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2022-07-20 05:27:57,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:57,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75218140] [2022-07-20 05:27:57,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:57,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:57,600 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 05:27:57,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:57,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75218140] [2022-07-20 05:27:57,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75218140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:57,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506849967] [2022-07-20 05:27:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:57,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:57,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:57,602 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 05:27:57,603 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 05:27:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:57,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 05:27:57,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:57,744 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 14 treesize of output 10 [2022-07-20 05:27:57,798 INFO L356 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2022-07-20 05:27:57,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 05:27:57,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:27:57,930 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:27:57,931 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 05:27:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:27:57,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:27:57,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506849967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:57,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:27:57,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 23 [2022-07-20 05:27:57,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472883563] [2022-07-20 05:27:57,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:57,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:27:57,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:57,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:27:57,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:27:57,997 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) 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 05:27:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:58,048 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-07-20 05:27:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:27:58,048 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) 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 25 [2022-07-20 05:27:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:58,049 INFO L225 Difference]: With dead ends: 65 [2022-07-20 05:27:58,049 INFO L226 Difference]: Without dead ends: 65 [2022-07-20 05:27:58,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-07-20 05:27:58,050 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:58,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 166 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 40 Unchecked, 0.0s Time] [2022-07-20 05:27:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-20 05:27:58,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-07-20 05:27:58,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 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 05:27:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2022-07-20 05:27:58,052 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2022-07-20 05:27:58,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:58,052 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2022-07-20 05:27:58,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) 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 05:27:58,052 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2022-07-20 05:27:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:27:58,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:58,053 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:58,105 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 05:27:58,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:58,255 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:58,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2022-07-20 05:27:58,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:58,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856040473] [2022-07-20 05:27:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:58,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:27:58,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:58,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856040473] [2022-07-20 05:27:58,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856040473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:27:58,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:27:58,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-20 05:27:58,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721945108] [2022-07-20 05:27:58,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:27:58,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:27:58,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:58,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:27:58,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:27:58,387 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 05:27:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:58,561 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-07-20 05:27:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:27:58,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 25 [2022-07-20 05:27:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:58,562 INFO L225 Difference]: With dead ends: 93 [2022-07-20 05:27:58,562 INFO L226 Difference]: Without dead ends: 93 [2022-07-20 05:27:58,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:27:58,563 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:58,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 153 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:27:58,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-20 05:27:58,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2022-07-20 05:27:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 states have internal predecessors, (73), 0 states have call successors, (0), 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 05:27:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-07-20 05:27:58,565 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2022-07-20 05:27:58,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:58,565 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-07-20 05:27:58,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 05:27:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-07-20 05:27:58,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 05:27:58,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:58,566 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:58,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 05:27:58,566 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:58,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2022-07-20 05:27:58,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:58,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809970425] [2022-07-20 05:27:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:58,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:27:58,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:58,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809970425] [2022-07-20 05:27:58,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809970425] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:58,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530072189] [2022-07-20 05:27:58,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:58,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:58,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:58,693 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 05:27:58,694 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 05:27:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:58,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:27:58,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:27:58,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:27:58,997 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 5 treesize of output 3 [2022-07-20 05:27:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:27:59,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530072189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:27:59,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:27:59,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-07-20 05:27:59,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368558181] [2022-07-20 05:27:59,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:27:59,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 05:27:59,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:27:59,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 05:27:59,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:27:59,023 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 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 05:27:59,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:27:59,288 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-07-20 05:27:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:27:59,290 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 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 29 [2022-07-20 05:27:59,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:27:59,291 INFO L225 Difference]: With dead ends: 86 [2022-07-20 05:27:59,291 INFO L226 Difference]: Without dead ends: 86 [2022-07-20 05:27:59,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-07-20 05:27:59,292 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 192 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:27:59,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 281 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:27:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-20 05:27:59,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-07-20 05:27:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 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 05:27:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-07-20 05:27:59,295 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2022-07-20 05:27:59,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:27:59,295 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-07-20 05:27:59,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 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 05:27:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-07-20 05:27:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 05:27:59,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:27:59,296 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:27:59,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 05:27:59,513 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,SelfDestructingSolverStorable21 [2022-07-20 05:27:59,513 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:27:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:27:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2022-07-20 05:27:59,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:27:59,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161021121] [2022-07-20 05:27:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:27:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:27:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:27:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:27:59,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:27:59,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161021121] [2022-07-20 05:27:59,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161021121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:27:59,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517947081] [2022-07-20 05:27:59,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:27:59,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:27:59,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:27:59,722 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 05:27:59,723 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 05:27:59,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:27:59,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:27:59,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 05:27:59,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:27:59,837 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 14 treesize of output 10 [2022-07-20 05:28:00,165 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:00,166 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 20 treesize of output 20 [2022-07-20 05:28:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:00,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:00,797 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 15 treesize of output 13 [2022-07-20 05:28:00,801 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 22 [2022-07-20 05:28:00,805 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 35 treesize of output 27 [2022-07-20 05:28:00,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:00,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517947081] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:00,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:00,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2022-07-20 05:28:00,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036076927] [2022-07-20 05:28:00,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:00,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 05:28:00,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:00,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 05:28:00,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 05:28:00,836 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 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 05:28:01,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:01,392 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2022-07-20 05:28:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:28:01,392 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 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 30 [2022-07-20 05:28:01,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:01,394 INFO L225 Difference]: With dead ends: 134 [2022-07-20 05:28:01,394 INFO L226 Difference]: Without dead ends: 115 [2022-07-20 05:28:01,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=262, Invalid=2494, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 05:28:01,396 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:01,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 373 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-07-20 05:28:01,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-20 05:28:01,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2022-07-20 05:28:01,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 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 05:28:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2022-07-20 05:28:01,399 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 30 [2022-07-20 05:28:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:01,400 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2022-07-20 05:28:01,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 states have internal predecessors, (73), 0 states have call successors, (0), 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 05:28:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2022-07-20 05:28:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 05:28:01,401 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:01,401 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:01,425 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 05:28:01,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:01,602 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:01,602 INFO L85 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2022-07-20 05:28:01,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:01,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289181818] [2022-07-20 05:28:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:01,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:01,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289181818] [2022-07-20 05:28:01,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289181818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:01,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487222071] [2022-07-20 05:28:01,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:28:01,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:01,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:01,876 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 05:28:01,904 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 05:28:01,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:28:01,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:01,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 05:28:01,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:01,970 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 05:28:02,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:28:02,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:02,313 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-20 05:28:02,313 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 18 treesize of output 10 [2022-07-20 05:28:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:02,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:02,473 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_286 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_286) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-20 05:28:02,479 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:02,480 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:28:02,487 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:02,487 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 37 treesize of output 37 [2022-07-20 05:28:02,491 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 11 treesize of output 7 [2022-07-20 05:28:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:02,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487222071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:02,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:02,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 32 [2022-07-20 05:28:02,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629594106] [2022-07-20 05:28:02,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:02,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 05:28:02,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 05:28:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=826, Unknown=1, NotChecked=58, Total=992 [2022-07-20 05:28:02,636 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 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 05:28:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:03,140 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2022-07-20 05:28:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:28:03,141 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 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 37 [2022-07-20 05:28:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:03,142 INFO L225 Difference]: With dead ends: 178 [2022-07-20 05:28:03,142 INFO L226 Difference]: Without dead ends: 178 [2022-07-20 05:28:03,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=330, Invalid=1653, Unknown=1, NotChecked=86, Total=2070 [2022-07-20 05:28:03,143 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 209 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:03,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 455 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 255 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-07-20 05:28:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-20 05:28:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2022-07-20 05:28:03,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.139240506329114) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:28:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2022-07-20 05:28:03,158 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 37 [2022-07-20 05:28:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:03,159 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2022-07-20 05:28:03,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.625) internal successors, (84), 32 states have internal predecessors, (84), 0 states have call successors, (0), 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 05:28:03,159 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2022-07-20 05:28:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 05:28:03,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:03,160 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:03,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:28:03,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:03,380 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:03,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:03,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 3 times [2022-07-20 05:28:03,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:03,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25838124] [2022-07-20 05:28:03,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:03,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:03,547 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:03,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:03,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25838124] [2022-07-20 05:28:03,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25838124] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:03,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632819301] [2022-07-20 05:28:03,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:28:03,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:03,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:03,549 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 05:28:03,550 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 05:28:03,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-20 05:28:03,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:03,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-20 05:28:03,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:03,643 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 05:28:03,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2022-07-20 05:28:03,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-20 05:28:04,337 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-20 05:28:04,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 05:28:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:04,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:13,726 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:13,727 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:28:13,732 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:13,732 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 27 treesize of output 31 [2022-07-20 05:28:13,739 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 22 [2022-07-20 05:28:13,749 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:13,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 44 treesize of output 48 [2022-07-20 05:28:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:14,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632819301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:14,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:14,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 16] total 42 [2022-07-20 05:28:14,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497326683] [2022-07-20 05:28:14,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 05:28:14,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:14,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 05:28:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1555, Unknown=27, NotChecked=0, Total=1722 [2022-07-20 05:28:14,940 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 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 05:28:17,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:17,872 INFO L93 Difference]: Finished difference Result 325 states and 354 transitions. [2022-07-20 05:28:17,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-20 05:28:17,877 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 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 05:28:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:17,878 INFO L225 Difference]: With dead ends: 325 [2022-07-20 05:28:17,878 INFO L226 Difference]: Without dead ends: 279 [2022-07-20 05:28:17,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=355, Invalid=3518, Unknown=33, NotChecked=0, Total=3906 [2022-07-20 05:28:17,880 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 136 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:17,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 751 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 495 Invalid, 0 Unknown, 285 Unchecked, 0.2s Time] [2022-07-20 05:28:17,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-20 05:28:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 194. [2022-07-20 05:28:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.1354166666666667) internal successors, (218), 193 states have internal predecessors, (218), 0 states have call successors, (0), 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 05:28:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 218 transitions. [2022-07-20 05:28:17,885 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 218 transitions. Word has length 39 [2022-07-20 05:28:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:17,885 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 218 transitions. [2022-07-20 05:28:17,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 42 states have internal predecessors, (91), 0 states have call successors, (0), 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 05:28:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 218 transitions. [2022-07-20 05:28:17,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 05:28:17,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:17,887 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:17,915 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 05:28:18,099 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,SelfDestructingSolverStorable24 [2022-07-20 05:28:18,100 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:18,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:18,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1200593699, now seen corresponding path program 3 times [2022-07-20 05:28:18,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:18,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298001257] [2022-07-20 05:28:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:18,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:18,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:18,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298001257] [2022-07-20 05:28:18,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298001257] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:18,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600578876] [2022-07-20 05:28:18,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:28:18,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:18,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:18,244 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 05:28:18,245 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 05:28:18,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 05:28:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:18,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 05:28:18,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:18,353 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:28:18,354 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 05:28:18,654 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 13 treesize of output 9 [2022-07-20 05:28:19,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:28:19,105 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 05:28:19,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 28 [2022-07-20 05:28:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:19,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:19,699 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 37 treesize of output 31 [2022-07-20 05:28:20,498 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:20,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600578876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:20,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:20,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 44 [2022-07-20 05:28:20,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246394352] [2022-07-20 05:28:20,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:20,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 05:28:20,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:20,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 05:28:20,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1790, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 05:28:20,501 INFO L87 Difference]: Start difference. First operand 194 states and 218 transitions. Second operand has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 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 05:28:22,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:22,509 INFO L93 Difference]: Finished difference Result 252 states and 279 transitions. [2022-07-20 05:28:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-20 05:28:22,509 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 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) Word has length 41 [2022-07-20 05:28:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:22,510 INFO L225 Difference]: With dead ends: 252 [2022-07-20 05:28:22,510 INFO L226 Difference]: Without dead ends: 252 [2022-07-20 05:28:22,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=743, Invalid=5419, Unknown=0, NotChecked=0, Total=6162 [2022-07-20 05:28:22,512 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 284 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:22,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 871 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 835 Invalid, 0 Unknown, 215 Unchecked, 0.4s Time] [2022-07-20 05:28:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-07-20 05:28:22,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 209. [2022-07-20 05:28:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1400966183574879) internal successors, (236), 208 states have internal predecessors, (236), 0 states have call successors, (0), 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 05:28:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2022-07-20 05:28:22,520 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 41 [2022-07-20 05:28:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:22,520 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2022-07-20 05:28:22,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.6136363636363638) internal successors, (115), 45 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 05:28:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2022-07-20 05:28:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 05:28:22,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:22,522 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:22,548 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 05:28:22,736 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,SelfDestructingSolverStorable25 [2022-07-20 05:28:22,736 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:22,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1978925873, now seen corresponding path program 1 times [2022-07-20 05:28:22,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:22,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847741340] [2022-07-20 05:28:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:22,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:22,923 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:28:22,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847741340] [2022-07-20 05:28:22,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847741340] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737287836] [2022-07-20 05:28:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:22,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:22,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:22,926 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 05:28:22,932 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 05:28:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:23,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 05:28:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:23,071 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 14 treesize of output 10 [2022-07-20 05:28:23,231 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 15 treesize of output 7 [2022-07-20 05:28:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:28:23,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:23,315 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 15 treesize of output 13 [2022-07-20 05:28:23,317 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 22 [2022-07-20 05:28:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:28:23,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737287836] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:23,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:23,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-07-20 05:28:23,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226430755] [2022-07-20 05:28:23,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:23,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 05:28:23,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 05:28:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-20 05:28:23,408 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 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 05:28:23,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:23,762 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2022-07-20 05:28:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:28:23,762 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-20 05:28:23,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:23,763 INFO L225 Difference]: With dead ends: 258 [2022-07-20 05:28:23,763 INFO L226 Difference]: Without dead ends: 227 [2022-07-20 05:28:23,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=297, Invalid=1263, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 05:28:23,764 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 106 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:23,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 299 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 153 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-07-20 05:28:23,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-20 05:28:23,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-07-20 05:28:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.1294642857142858) internal successors, (253), 225 states have internal predecessors, (253), 0 states have call successors, (0), 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 05:28:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 253 transitions. [2022-07-20 05:28:23,769 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 253 transitions. Word has length 42 [2022-07-20 05:28:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:23,769 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 253 transitions. [2022-07-20 05:28:23,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 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 05:28:23,769 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 253 transitions. [2022-07-20 05:28:23,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 05:28:23,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:23,770 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:23,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-20 05:28:23,975 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,SelfDestructingSolverStorable26 [2022-07-20 05:28:23,976 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 4 times [2022-07-20 05:28:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:23,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318559611] [2022-07-20 05:28:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:23,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:24,161 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:24,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:24,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318559611] [2022-07-20 05:28:24,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318559611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:24,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366262947] [2022-07-20 05:28:24,161 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:28:24,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:24,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:24,163 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 05:28:24,164 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 05:28:24,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:28:24,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-20 05:28:24,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:24,261 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:28:24,262 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 05:28:24,413 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 16 treesize of output 12 [2022-07-20 05:28:24,698 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:24,698 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 21 treesize of output 21 [2022-07-20 05:28:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:24,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:25,307 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 15 treesize of output 13 [2022-07-20 05:28:25,310 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 22 [2022-07-20 05:28:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:25,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366262947] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:25,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:25,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 45 [2022-07-20 05:28:25,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356343934] [2022-07-20 05:28:25,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:25,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 05:28:25,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:25,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 05:28:25,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1869, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 05:28:25,777 INFO L87 Difference]: Start difference. First operand 226 states and 253 transitions. Second operand has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 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 05:28:27,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:27,997 INFO L93 Difference]: Finished difference Result 471 states and 519 transitions. [2022-07-20 05:28:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-20 05:28:27,998 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 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 43 [2022-07-20 05:28:27,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:27,999 INFO L225 Difference]: With dead ends: 471 [2022-07-20 05:28:27,999 INFO L226 Difference]: Without dead ends: 471 [2022-07-20 05:28:28,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1301, Invalid=5341, Unknown=0, NotChecked=0, Total=6642 [2022-07-20 05:28:28,001 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 842 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:28,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 611 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 834 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-07-20 05:28:28,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-07-20 05:28:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 283. [2022-07-20 05:28:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 281 states have (on average 1.1387900355871887) internal successors, (320), 282 states have internal predecessors, (320), 0 states have call successors, (0), 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 05:28:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 320 transitions. [2022-07-20 05:28:28,009 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 320 transitions. Word has length 43 [2022-07-20 05:28:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:28,010 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 320 transitions. [2022-07-20 05:28:28,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.688888888888889) internal successors, (121), 46 states have internal predecessors, (121), 0 states have call successors, (0), 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 05:28:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 320 transitions. [2022-07-20 05:28:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 05:28:28,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:28,011 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:28,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 05:28:28,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 05:28:28,223 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 4 times [2022-07-20 05:28:28,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:28,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751572839] [2022-07-20 05:28:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:28,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:28,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:28,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751572839] [2022-07-20 05:28:28,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751572839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:28,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554077123] [2022-07-20 05:28:28,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:28:28,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:28,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:28,820 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 05:28:28,854 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 05:28:28,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:28:28,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:28,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-20 05:28:28,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:28,938 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:28:28,939 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 05:28:28,949 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 05:28:29,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-07-20 05:28:29,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:28:29,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:28:29,627 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-20 05:28:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:29,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:30,171 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:30,172 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-20 05:28:30,177 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:30,177 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 33 treesize of output 33 [2022-07-20 05:28:30,180 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 9 treesize of output 7 [2022-07-20 05:28:30,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:28:30,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:28:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:30,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554077123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:30,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:30,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16, 16] total 53 [2022-07-20 05:28:30,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585512191] [2022-07-20 05:28:30,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:30,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 05:28:30,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 05:28:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2562, Unknown=30, NotChecked=0, Total=2756 [2022-07-20 05:28:30,573 INFO L87 Difference]: Start difference. First operand 283 states and 320 transitions. Second operand has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 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 05:28:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:32,277 INFO L93 Difference]: Finished difference Result 472 states and 532 transitions. [2022-07-20 05:28:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-20 05:28:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 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) Word has length 49 [2022-07-20 05:28:32,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:32,285 INFO L225 Difference]: With dead ends: 472 [2022-07-20 05:28:32,285 INFO L226 Difference]: Without dead ends: 445 [2022-07-20 05:28:32,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=621, Invalid=7359, Unknown=30, NotChecked=0, Total=8010 [2022-07-20 05:28:32,288 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 182 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:32,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 956 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 661 Invalid, 0 Unknown, 313 Unchecked, 0.3s Time] [2022-07-20 05:28:32,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-07-20 05:28:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 412. [2022-07-20 05:28:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 410 states have (on average 1.148780487804878) internal successors, (471), 411 states have internal predecessors, (471), 0 states have call successors, (0), 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 05:28:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 471 transitions. [2022-07-20 05:28:32,296 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 471 transitions. Word has length 49 [2022-07-20 05:28:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:32,297 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 471 transitions. [2022-07-20 05:28:32,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.452830188679245) internal successors, (130), 53 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 05:28:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 471 transitions. [2022-07-20 05:28:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 05:28:32,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:32,298 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:32,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-20 05:28:32,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 05:28:32,507 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:32,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:32,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1185464536, now seen corresponding path program 5 times [2022-07-20 05:28:32,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:32,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832673687] [2022-07-20 05:28:32,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:32,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 49 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:32,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832673687] [2022-07-20 05:28:32,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832673687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:32,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382705561] [2022-07-20 05:28:32,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:28:32,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:32,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:32,683 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 05:28:32,709 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 05:28:32,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-20 05:28:32,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:32,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 05:28:32,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:32,797 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:28:32,797 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 05:28:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:33,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:33,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382705561] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:33,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:33,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-07-20 05:28:33,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765536251] [2022-07-20 05:28:33,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:33,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 05:28:33,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 05:28:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 05:28:33,323 INFO L87 Difference]: Start difference. First operand 412 states and 471 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 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 05:28:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:34,116 INFO L93 Difference]: Finished difference Result 889 states and 986 transitions. [2022-07-20 05:28:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 05:28:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-20 05:28:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:34,119 INFO L225 Difference]: With dead ends: 889 [2022-07-20 05:28:34,119 INFO L226 Difference]: Without dead ends: 757 [2022-07-20 05:28:34,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=936, Invalid=3096, Unknown=0, NotChecked=0, Total=4032 [2022-07-20 05:28:34,120 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 261 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:34,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 562 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:28:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-07-20 05:28:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 540. [2022-07-20 05:28:34,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 538 states have (on average 1.1449814126394051) internal successors, (616), 539 states have internal predecessors, (616), 0 states have call successors, (0), 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 05:28:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 616 transitions. [2022-07-20 05:28:34,132 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 616 transitions. Word has length 53 [2022-07-20 05:28:34,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:34,133 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 616 transitions. [2022-07-20 05:28:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 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 05:28:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 616 transitions. [2022-07-20 05:28:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 05:28:34,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:34,134 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:34,159 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 05:28:34,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:34,355 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:34,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:34,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1963378865, now seen corresponding path program 5 times [2022-07-20 05:28:34,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:34,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910503245] [2022-07-20 05:28:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:34,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:34,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910503245] [2022-07-20 05:28:34,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910503245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:34,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42134281] [2022-07-20 05:28:34,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:28:34,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:34,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:34,524 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 05:28:34,524 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 05:28:34,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 05:28:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:34,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 05:28:34,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:34,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:28:34,619 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 05:28:34,622 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 05:28:34,843 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:34,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:35,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42134281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:35,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:35,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-07-20 05:28:35,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722496591] [2022-07-20 05:28:35,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:35,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 05:28:35,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:35,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 05:28:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:28:35,123 INFO L87 Difference]: Start difference. First operand 540 states and 616 transitions. Second operand has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 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 05:28:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:35,767 INFO L93 Difference]: Finished difference Result 641 states and 720 transitions. [2022-07-20 05:28:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 05:28:35,768 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-20 05:28:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:35,769 INFO L225 Difference]: With dead ends: 641 [2022-07-20 05:28:35,769 INFO L226 Difference]: Without dead ends: 641 [2022-07-20 05:28:35,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 05:28:35,770 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 348 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:35,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 843 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:28:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-07-20 05:28:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 601. [2022-07-20 05:28:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 599 states have (on average 1.1452420701168615) internal successors, (686), 600 states have internal predecessors, (686), 0 states have call successors, (0), 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 05:28:35,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 686 transitions. [2022-07-20 05:28:35,781 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 686 transitions. Word has length 53 [2022-07-20 05:28:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:35,782 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 686 transitions. [2022-07-20 05:28:35,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.321428571428571) internal successors, (149), 29 states have internal predecessors, (149), 0 states have call successors, (0), 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 05:28:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 686 transitions. [2022-07-20 05:28:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 05:28:35,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:35,783 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:35,802 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 05:28:35,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:35,992 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:35,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:35,992 INFO L85 PathProgramCache]: Analyzing trace with hash 678158875, now seen corresponding path program 6 times [2022-07-20 05:28:35,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:35,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140428003] [2022-07-20 05:28:35,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:35,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:36,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140428003] [2022-07-20 05:28:36,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140428003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:36,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181668624] [2022-07-20 05:28:36,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:28:36,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:36,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:36,253 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 05:28:36,257 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 05:28:36,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 05:28:36,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:36,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-20 05:28:36,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:36,478 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 14 treesize of output 10 [2022-07-20 05:28:36,611 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 15 treesize of output 7 [2022-07-20 05:28:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:36,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:36,730 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 15 treesize of output 13 [2022-07-20 05:28:36,734 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 22 [2022-07-20 05:28:36,863 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 14 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:36,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181668624] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:36,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:36,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2022-07-20 05:28:36,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281953590] [2022-07-20 05:28:36,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:36,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 05:28:36,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 05:28:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:28:36,865 INFO L87 Difference]: Start difference. First operand 601 states and 686 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 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 05:28:37,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:37,612 INFO L93 Difference]: Finished difference Result 1102 states and 1231 transitions. [2022-07-20 05:28:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 05:28:37,612 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 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 57 [2022-07-20 05:28:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:37,615 INFO L225 Difference]: With dead ends: 1102 [2022-07-20 05:28:37,615 INFO L226 Difference]: Without dead ends: 1001 [2022-07-20 05:28:37,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 05:28:37,617 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 371 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 1190 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:37,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 1190 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 967 Invalid, 0 Unknown, 52 Unchecked, 0.4s Time] [2022-07-20 05:28:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-07-20 05:28:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 617. [2022-07-20 05:28:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 615 states have (on average 1.1447154471544716) internal successors, (704), 616 states have internal predecessors, (704), 0 states have call successors, (0), 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 05:28:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 704 transitions. [2022-07-20 05:28:37,633 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 704 transitions. Word has length 57 [2022-07-20 05:28:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:37,634 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 704 transitions. [2022-07-20 05:28:37,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 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 05:28:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 704 transitions. [2022-07-20 05:28:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-20 05:28:37,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:37,635 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:37,660 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 05:28:37,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:37,851 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:37,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:37,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1017817884, now seen corresponding path program 1 times [2022-07-20 05:28:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:37,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421599340] [2022-07-20 05:28:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:37,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:28:38,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:38,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421599340] [2022-07-20 05:28:38,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421599340] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:38,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739944918] [2022-07-20 05:28:38,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:38,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:38,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:38,075 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 05:28:38,076 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 05:28:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:38,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 05:28:38,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:38,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 05:28:38,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:28:38,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:38,424 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 15 treesize of output 7 [2022-07-20 05:28:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:28:38,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:38,515 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_595 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_595) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:38,528 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:38,528 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:28:38,537 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:38,537 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 37 treesize of output 37 [2022-07-20 05:28:38,540 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 11 treesize of output 7 [2022-07-20 05:28:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:28:38,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739944918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:38,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:38,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-07-20 05:28:38,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542355565] [2022-07-20 05:28:38,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:38,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:28:38,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:38,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:28:38,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=780, Unknown=1, NotChecked=56, Total=930 [2022-07-20 05:28:38,697 INFO L87 Difference]: Start difference. First operand 617 states and 704 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 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 05:28:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:39,040 INFO L93 Difference]: Finished difference Result 625 states and 700 transitions. [2022-07-20 05:28:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 05:28:39,040 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 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 58 [2022-07-20 05:28:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:39,042 INFO L225 Difference]: With dead ends: 625 [2022-07-20 05:28:39,042 INFO L226 Difference]: Without dead ends: 544 [2022-07-20 05:28:39,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=1258, Unknown=1, NotChecked=72, Total=1482 [2022-07-20 05:28:39,043 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 81 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:39,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 801 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 480 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-07-20 05:28:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-07-20 05:28:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 475. [2022-07-20 05:28:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 473 states have (on average 1.1374207188160677) internal successors, (538), 474 states have internal predecessors, (538), 0 states have call successors, (0), 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 05:28:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 538 transitions. [2022-07-20 05:28:39,052 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 538 transitions. Word has length 58 [2022-07-20 05:28:39,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:39,052 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 538 transitions. [2022-07-20 05:28:39,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 states have internal predecessors, (85), 0 states have call successors, (0), 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 05:28:39,052 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 538 transitions. [2022-07-20 05:28:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 05:28:39,053 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:39,053 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:39,080 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 05:28:39,267 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,SelfDestructingSolverStorable32 [2022-07-20 05:28:39,267 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:39,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:39,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1164356062, now seen corresponding path program 7 times [2022-07-20 05:28:39,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:39,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775651148] [2022-07-20 05:28:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:39,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 15 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:39,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:39,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775651148] [2022-07-20 05:28:39,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775651148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:39,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089883449] [2022-07-20 05:28:39,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:28:39,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:39,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:39,484 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 05:28:39,485 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 05:28:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 05:28:39,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:39,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:40,061 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 5 treesize of output 3 [2022-07-20 05:28:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:40,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089883449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:40,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:40,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2022-07-20 05:28:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936439826] [2022-07-20 05:28:40,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:40,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 05:28:40,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 05:28:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 05:28:40,095 INFO L87 Difference]: Start difference. First operand 475 states and 538 transitions. Second operand has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 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 05:28:40,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:40,953 INFO L93 Difference]: Finished difference Result 796 states and 885 transitions. [2022-07-20 05:28:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:28:40,953 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 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 61 [2022-07-20 05:28:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:40,955 INFO L225 Difference]: With dead ends: 796 [2022-07-20 05:28:40,956 INFO L226 Difference]: Without dead ends: 796 [2022-07-20 05:28:40,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=2679, Unknown=0, NotChecked=0, Total=3306 [2022-07-20 05:28:40,957 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 483 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:40,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 856 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1111 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 05:28:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-07-20 05:28:40,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 510. [2022-07-20 05:28:40,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 508 states have (on average 1.139763779527559) internal successors, (579), 509 states have internal predecessors, (579), 0 states have call successors, (0), 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 05:28:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 579 transitions. [2022-07-20 05:28:40,973 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 579 transitions. Word has length 61 [2022-07-20 05:28:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:40,973 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 579 transitions. [2022-07-20 05:28:40,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 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 05:28:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 579 transitions. [2022-07-20 05:28:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 05:28:40,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:40,977 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:41,004 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 05:28:41,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:41,187 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:41,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1052245572, now seen corresponding path program 6 times [2022-07-20 05:28:41,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:41,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643097166] [2022-07-20 05:28:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:41,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:41,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643097166] [2022-07-20 05:28:41,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643097166] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:41,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920753998] [2022-07-20 05:28:41,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:28:41,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:41,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:41,560 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 05:28:41,561 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 05:28:41,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 05:28:41,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:41,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-20 05:28:41,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:41,669 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 05:28:41,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:28:41,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:42,030 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 15 treesize of output 7 [2022-07-20 05:28:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:42,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:42,183 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_672 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_672) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:28:42,187 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:42,187 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:28:42,192 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:42,192 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 37 treesize of output 37 [2022-07-20 05:28:42,194 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 11 treesize of output 7 [2022-07-20 05:28:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:42,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920753998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:42,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:42,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18, 18] total 44 [2022-07-20 05:28:42,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997959442] [2022-07-20 05:28:42,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:42,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 05:28:42,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 05:28:42,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1686, Unknown=1, NotChecked=82, Total=1892 [2022-07-20 05:28:42,408 INFO L87 Difference]: Start difference. First operand 510 states and 579 transitions. Second operand has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 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 05:28:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:43,611 INFO L93 Difference]: Finished difference Result 938 states and 1044 transitions. [2022-07-20 05:28:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-20 05:28:43,614 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 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 61 [2022-07-20 05:28:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:43,616 INFO L225 Difference]: With dead ends: 938 [2022-07-20 05:28:43,617 INFO L226 Difference]: Without dead ends: 798 [2022-07-20 05:28:43,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=279, Invalid=4280, Unknown=1, NotChecked=132, Total=4692 [2022-07-20 05:28:43,618 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 193 mSDsluCounter, 2029 mSDsCounter, 0 mSdLazyCounter, 1970 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 2123 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:43,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 2123 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1970 Invalid, 0 Unknown, 143 Unchecked, 0.7s Time] [2022-07-20 05:28:43,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-07-20 05:28:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 574. [2022-07-20 05:28:43,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 572 states have (on average 1.1398601398601398) internal successors, (652), 573 states have internal predecessors, (652), 0 states have call successors, (0), 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 05:28:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 652 transitions. [2022-07-20 05:28:43,638 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 652 transitions. Word has length 61 [2022-07-20 05:28:43,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:43,638 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 652 transitions. [2022-07-20 05:28:43,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.6818181818181817) internal successors, (118), 44 states have internal predecessors, (118), 0 states have call successors, (0), 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 05:28:43,639 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 652 transitions. [2022-07-20 05:28:43,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 05:28:43,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:43,640 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:43,668 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 05:28:43,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:43,864 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:43,865 INFO L85 PathProgramCache]: Analyzing trace with hash 241818559, now seen corresponding path program 7 times [2022-07-20 05:28:43,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:43,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521257917] [2022-07-20 05:28:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:43,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:44,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:44,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521257917] [2022-07-20 05:28:44,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521257917] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:44,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551710707] [2022-07-20 05:28:44,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:28:44,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:44,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:44,055 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 05:28:44,056 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 05:28:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-20 05:28:44,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:44,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:44,585 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 5 treesize of output 3 [2022-07-20 05:28:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:44,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551710707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:44,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:44,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-07-20 05:28:44,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147651823] [2022-07-20 05:28:44,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:44,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 05:28:44,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 05:28:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:28:44,619 INFO L87 Difference]: Start difference. First operand 574 states and 652 transitions. Second operand has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 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 05:28:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:45,178 INFO L93 Difference]: Finished difference Result 861 states and 965 transitions. [2022-07-20 05:28:45,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 05:28:45,179 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 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 65 [2022-07-20 05:28:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:45,181 INFO L225 Difference]: With dead ends: 861 [2022-07-20 05:28:45,181 INFO L226 Difference]: Without dead ends: 861 [2022-07-20 05:28:45,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 05:28:45,182 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 372 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 947 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:45,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 947 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:28:45,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-07-20 05:28:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 640. [2022-07-20 05:28:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 638 states have (on average 1.141065830721003) internal successors, (728), 639 states have internal predecessors, (728), 0 states have call successors, (0), 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 05:28:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 728 transitions. [2022-07-20 05:28:45,192 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 728 transitions. Word has length 65 [2022-07-20 05:28:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:45,192 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 728 transitions. [2022-07-20 05:28:45,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.366666666666666) internal successors, (131), 31 states have internal predecessors, (131), 0 states have call successors, (0), 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 05:28:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 728 transitions. [2022-07-20 05:28:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 05:28:45,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:45,194 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:45,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-20 05:28:45,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:45,413 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:45,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:45,414 INFO L85 PathProgramCache]: Analyzing trace with hash 147941651, now seen corresponding path program 8 times [2022-07-20 05:28:45,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:45,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568253023] [2022-07-20 05:28:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:45,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:45,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568253023] [2022-07-20 05:28:45,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568253023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418006296] [2022-07-20 05:28:45,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:28:45,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:45,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:45,689 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 05:28:45,690 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 05:28:45,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:28:45,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:45,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-20 05:28:45,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:45,886 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 14 treesize of output 10 [2022-07-20 05:28:46,431 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:46,431 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 20 treesize of output 20 [2022-07-20 05:28:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:46,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:47,287 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 15 treesize of output 13 [2022-07-20 05:28:47,291 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 22 [2022-07-20 05:28:47,296 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 35 treesize of output 27 [2022-07-20 05:28:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:47,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418006296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:47,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:47,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 57 [2022-07-20 05:28:47,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149265557] [2022-07-20 05:28:47,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:47,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-20 05:28:47,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:47,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-20 05:28:47,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2973, Unknown=0, NotChecked=0, Total=3192 [2022-07-20 05:28:47,339 INFO L87 Difference]: Start difference. First operand 640 states and 728 transitions. Second operand has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 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 05:28:50,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:50,036 INFO L93 Difference]: Finished difference Result 1303 states and 1451 transitions. [2022-07-20 05:28:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-20 05:28:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 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 66 [2022-07-20 05:28:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:50,040 INFO L225 Difference]: With dead ends: 1303 [2022-07-20 05:28:50,040 INFO L226 Difference]: Without dead ends: 1252 [2022-07-20 05:28:50,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=570, Invalid=7086, Unknown=0, NotChecked=0, Total=7656 [2022-07-20 05:28:50,041 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 439 mSDsluCounter, 1960 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 2055 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:50,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 2055 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1426 Invalid, 0 Unknown, 605 Unchecked, 0.5s Time] [2022-07-20 05:28:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-07-20 05:28:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 818. [2022-07-20 05:28:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 816 states have (on average 1.1397058823529411) internal successors, (930), 817 states have internal predecessors, (930), 0 states have call successors, (0), 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 05:28:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 930 transitions. [2022-07-20 05:28:50,056 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 930 transitions. Word has length 66 [2022-07-20 05:28:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:50,056 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 930 transitions. [2022-07-20 05:28:50,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.8947368421052633) internal successors, (165), 57 states have internal predecessors, (165), 0 states have call successors, (0), 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 05:28:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 930 transitions. [2022-07-20 05:28:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:28:50,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:50,058 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:50,082 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 05:28:50,271 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,SelfDestructingSolverStorable36 [2022-07-20 05:28:50,271 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash 2007377610, now seen corresponding path program 8 times [2022-07-20 05:28:50,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:50,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258087255] [2022-07-20 05:28:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:50,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:50,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:50,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258087255] [2022-07-20 05:28:50,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258087255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:50,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061367135] [2022-07-20 05:28:50,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:28:50,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:50,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:50,697 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 05:28:50,697 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 05:28:50,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:28:50,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:50,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 122 conjunts are in the unsatisfiable core [2022-07-20 05:28:50,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:50,814 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 05:28:51,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:28:51,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:28:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:28:52,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:28:52,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:28:52,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 17 [2022-07-20 05:28:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:52,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:53,588 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:53,588 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2022-07-20 05:28:53,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:28:53,600 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:53,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 83 [2022-07-20 05:28:53,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:28:53,615 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:53,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 60 [2022-07-20 05:28:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 17 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:28:54,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061367135] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:54,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:54,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 29] total 71 [2022-07-20 05:28:54,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117048276] [2022-07-20 05:28:54,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:54,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-20 05:28:54,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:54,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-20 05:28:54,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4656, Unknown=50, NotChecked=0, Total=4970 [2022-07-20 05:28:54,660 INFO L87 Difference]: Start difference. First operand 818 states and 930 transitions. Second operand has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 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 05:28:56,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:28:56,709 INFO L93 Difference]: Finished difference Result 1560 states and 1762 transitions. [2022-07-20 05:28:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-20 05:28:56,710 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 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 73 [2022-07-20 05:28:56,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:28:56,712 INFO L225 Difference]: With dead ends: 1560 [2022-07-20 05:28:56,713 INFO L226 Difference]: Without dead ends: 1517 [2022-07-20 05:28:56,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=528, Invalid=10123, Unknown=61, NotChecked=0, Total=10712 [2022-07-20 05:28:56,714 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 310 mSDsluCounter, 3522 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 3634 SdHoareTripleChecker+Invalid, 3073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1464 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:28:56,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 3634 Invalid, 3073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1590 Invalid, 0 Unknown, 1464 Unchecked, 0.6s Time] [2022-07-20 05:28:56,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-07-20 05:28:56,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1282. [2022-07-20 05:28:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1280 states have (on average 1.1515625) internal successors, (1474), 1281 states have internal predecessors, (1474), 0 states have call successors, (0), 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 05:28:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1474 transitions. [2022-07-20 05:28:56,731 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1474 transitions. Word has length 73 [2022-07-20 05:28:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:28:56,731 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1474 transitions. [2022-07-20 05:28:56,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.563380281690141) internal successors, (182), 71 states have internal predecessors, (182), 0 states have call successors, (0), 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 05:28:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1474 transitions. [2022-07-20 05:28:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 05:28:56,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:28:56,734 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:28:56,757 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 05:28:56,955 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,SelfDestructingSolverStorable37 [2022-07-20 05:28:56,955 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:28:56,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:28:56,956 INFO L85 PathProgramCache]: Analyzing trace with hash 15423873, now seen corresponding path program 9 times [2022-07-20 05:28:56,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:28:56,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820829963] [2022-07-20 05:28:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:28:56,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:28:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:28:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 20 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:28:57,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:28:57,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820829963] [2022-07-20 05:28:57,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820829963] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:28:57,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482369787] [2022-07-20 05:28:57,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:28:57,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:28:57,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:28:57,300 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 05:28:57,318 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 05:28:57,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 05:28:57,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:28:57,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-20 05:28:57,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:28:57,477 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:28:57,478 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 05:28:57,564 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 14 treesize of output 10 [2022-07-20 05:28:57,933 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:28:57,934 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 20 treesize of output 20 [2022-07-20 05:28:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 05:28:58,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:28:58,577 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 15 treesize of output 13 [2022-07-20 05:28:58,581 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 22 [2022-07-20 05:28:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-07-20 05:28:58,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482369787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:28:58,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:28:58,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10, 10] total 43 [2022-07-20 05:28:58,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512761261] [2022-07-20 05:28:58,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:28:58,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 05:28:58,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:28:58,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 05:28:58,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1689, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 05:28:58,687 INFO L87 Difference]: Start difference. First operand 1282 states and 1474 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 0 states have call successors, (0), 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 05:29:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:29:00,473 INFO L93 Difference]: Finished difference Result 1693 states and 1921 transitions. [2022-07-20 05:29:00,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-20 05:29:00,474 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 0 states have call successors, (0), 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 05:29:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:29:00,477 INFO L225 Difference]: With dead ends: 1693 [2022-07-20 05:29:00,477 INFO L226 Difference]: Without dead ends: 1558 [2022-07-20 05:29:00,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=593, Invalid=7963, Unknown=0, NotChecked=0, Total=8556 [2022-07-20 05:29:00,478 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 115 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:29:00,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 940 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 992 Invalid, 0 Unknown, 195 Unchecked, 0.3s Time] [2022-07-20 05:29:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-07-20 05:29:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1253. [2022-07-20 05:29:00,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1251 states have (on average 1.149480415667466) internal successors, (1438), 1252 states have internal predecessors, (1438), 0 states have call successors, (0), 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 05:29:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1438 transitions. [2022-07-20 05:29:00,496 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1438 transitions. Word has length 75 [2022-07-20 05:29:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:29:00,496 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 1438 transitions. [2022-07-20 05:29:00,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 43 states have internal predecessors, (127), 0 states have call successors, (0), 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 05:29:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1438 transitions. [2022-07-20 05:29:00,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 05:29:00,498 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:29:00,498 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:29:00,523 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 05:29:00,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-20 05:29:00,723 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:29:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:29:00,724 INFO L85 PathProgramCache]: Analyzing trace with hash 2052723789, now seen corresponding path program 9 times [2022-07-20 05:29:00,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:29:00,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800698514] [2022-07-20 05:29:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:29:00,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:29:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:29:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:29:00,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:29:00,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800698514] [2022-07-20 05:29:00,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800698514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:29:00,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719521051] [2022-07-20 05:29:00,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:29:00,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:29:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:29:00,976 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 05:29:00,977 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 05:29:01,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 05:29:01,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:29:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-20 05:29:01,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:29:01,148 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:29:01,149 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 05:29:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:29:01,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:29:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:29:02,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719521051] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:29:02,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:29:02,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-07-20 05:29:02,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238923393] [2022-07-20 05:29:02,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:29:02,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 05:29:02,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:29:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 05:29:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1419, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 05:29:02,123 INFO L87 Difference]: Start difference. First operand 1253 states and 1438 transitions. Second operand has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 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 05:29:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:29:03,088 INFO L93 Difference]: Finished difference Result 1717 states and 1961 transitions. [2022-07-20 05:29:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 05:29:03,088 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 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 77 [2022-07-20 05:29:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:29:03,093 INFO L225 Difference]: With dead ends: 1717 [2022-07-20 05:29:03,093 INFO L226 Difference]: Without dead ends: 1717 [2022-07-20 05:29:03,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=779, Invalid=3127, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 05:29:03,094 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 413 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:29:03,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 831 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:29:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2022-07-20 05:29:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1349. [2022-07-20 05:29:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1347 states have (on average 1.1499628804751298) internal successors, (1549), 1348 states have internal predecessors, (1549), 0 states have call successors, (0), 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 05:29:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1549 transitions. [2022-07-20 05:29:03,111 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1549 transitions. Word has length 77 [2022-07-20 05:29:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:29:03,112 INFO L495 AbstractCegarLoop]: Abstraction has 1349 states and 1549 transitions. [2022-07-20 05:29:03,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.95) internal successors, (198), 41 states have internal predecessors, (198), 0 states have call successors, (0), 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 05:29:03,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1549 transitions. [2022-07-20 05:29:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-20 05:29:03,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:29:03,114 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:29:03,139 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 05:29:03,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:29:03,331 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:29:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:29:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash 791104003, now seen corresponding path program 2 times [2022-07-20 05:29:03,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:29:03,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393148975] [2022-07-20 05:29:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:29:03,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:29:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:29:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:29:03,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:29:03,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393148975] [2022-07-20 05:29:03,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393148975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:29:03,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711473370] [2022-07-20 05:29:03,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:29:03,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:29:03,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:29:03,638 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 05:29:03,639 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 05:29:03,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:29:03,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:29:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-20 05:29:03,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:29:03,765 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:29:03,766 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 05:29:03,988 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 14 treesize of output 10 [2022-07-20 05:29:04,669 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:29:04,670 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 20 treesize of output 20 [2022-07-20 05:29:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:29:04,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:29:05,682 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 15 treesize of output 13 [2022-07-20 05:29:05,685 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 22 [2022-07-20 05:29:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 45 proven. 119 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:29:06,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711473370] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:29:06,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:29:06,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 65 [2022-07-20 05:29:06,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420110251] [2022-07-20 05:29:06,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:29:06,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-20 05:29:06,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:29:06,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-20 05:29:06,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3886, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 05:29:06,391 INFO L87 Difference]: Start difference. First operand 1349 states and 1549 transitions. Second operand has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 states have internal predecessors, (220), 0 states have call successors, (0), 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 05:29:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:29:09,200 INFO L93 Difference]: Finished difference Result 3068 states and 3505 transitions. [2022-07-20 05:29:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-20 05:29:09,203 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 states have internal predecessors, (220), 0 states have call successors, (0), 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 78 [2022-07-20 05:29:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:29:09,209 INFO L225 Difference]: With dead ends: 3068 [2022-07-20 05:29:09,209 INFO L226 Difference]: Without dead ends: 2811 [2022-07-20 05:29:09,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1006, Invalid=12334, Unknown=0, NotChecked=0, Total=13340 [2022-07-20 05:29:09,210 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 618 mSDsluCounter, 1732 mSDsCounter, 0 mSdLazyCounter, 1304 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:29:09,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1804 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1304 Invalid, 0 Unknown, 400 Unchecked, 0.5s Time] [2022-07-20 05:29:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2022-07-20 05:29:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 1757. [2022-07-20 05:29:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1755 states have (on average 1.1515669515669515) internal successors, (2021), 1756 states have internal predecessors, (2021), 0 states have call successors, (0), 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 05:29:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2021 transitions. [2022-07-20 05:29:09,239 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2021 transitions. Word has length 78 [2022-07-20 05:29:09,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:29:09,239 INFO L495 AbstractCegarLoop]: Abstraction has 1757 states and 2021 transitions. [2022-07-20 05:29:09,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.3846153846153846) internal successors, (220), 65 states have internal predecessors, (220), 0 states have call successors, (0), 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 05:29:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2021 transitions. [2022-07-20 05:29:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-20 05:29:09,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:29:09,242 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:29:09,267 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 05:29:09,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:29:09,463 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:29:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:29:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1322263080, now seen corresponding path program 2 times [2022-07-20 05:29:09,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:29:09,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322403864] [2022-07-20 05:29:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:29:09,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:29:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:29:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 15 proven. 128 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 05:29:10,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:29:10,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322403864] [2022-07-20 05:29:10,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322403864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:29:10,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36335684] [2022-07-20 05:29:10,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:29:10,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:29:10,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:29:10,096 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 05:29:10,097 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 05:29:10,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:29:10,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:29:10,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 125 conjunts are in the unsatisfiable core [2022-07-20 05:29:10,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:29:10,231 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 05:29:10,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:29:10,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:29:11,697 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-20 05:29:11,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2022-07-20 05:29:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:29:11,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:29:12,264 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_975 (Array Int Int)) (|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (let ((.cse0 (select v_ArrVal_975 |ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_975) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (= .cse0 0)))) is different from false [2022-07-20 05:29:12,268 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:29:12,269 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:29:12,273 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:29:12,273 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 44 treesize of output 44 [2022-07-20 05:29:12,278 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:29:12,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 32 [2022-07-20 05:29:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 15 proven. 123 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 05:29:12,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36335684] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:29:12,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:29:12,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 70 [2022-07-20 05:29:12,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389310024] [2022-07-20 05:29:12,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:29:12,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-20 05:29:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:29:12,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-20 05:29:12,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=4432, Unknown=1, NotChecked=134, Total=4830 [2022-07-20 05:29:12,595 INFO L87 Difference]: Start difference. First operand 1757 states and 2021 transitions. Second operand has 70 states, 70 states have (on average 2.4571428571428573) internal successors, (172), 70 states have internal predecessors, (172), 0 states have call successors, (0), 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 05:29:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:29:13,831 INFO L93 Difference]: Finished difference Result 3098 states and 3570 transitions. [2022-07-20 05:29:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 05:29:13,831 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.4571428571428573) internal successors, (172), 70 states have internal predecessors, (172), 0 states have call successors, (0), 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 82 [2022-07-20 05:29:13,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:29:13,838 INFO L225 Difference]: With dead ends: 3098 [2022-07-20 05:29:13,838 INFO L226 Difference]: Without dead ends: 3098 [2022-07-20 05:29:13,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=429, Invalid=7406, Unknown=1, NotChecked=174, Total=8010 [2022-07-20 05:29:13,839 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 189 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:29:13,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 1585 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1440 Invalid, 0 Unknown, 335 Unchecked, 0.5s Time] [2022-07-20 05:29:13,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3098 states. [2022-07-20 05:29:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3098 to 2667. [2022-07-20 05:29:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2667 states, 2665 states have (on average 1.1545966228893059) internal successors, (3077), 2666 states have internal predecessors, (3077), 0 states have call successors, (0), 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 05:29:13,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2667 states to 2667 states and 3077 transitions. [2022-07-20 05:29:13,876 INFO L78 Accepts]: Start accepts. Automaton has 2667 states and 3077 transitions. Word has length 82 [2022-07-20 05:29:13,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:29:13,877 INFO L495 AbstractCegarLoop]: Abstraction has 2667 states and 3077 transitions. [2022-07-20 05:29:13,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.4571428571428573) internal successors, (172), 70 states have internal predecessors, (172), 0 states have call successors, (0), 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 05:29:13,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2667 states and 3077 transitions. [2022-07-20 05:29:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-20 05:29:13,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:29:13,880 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:29:13,907 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 05:29:14,095 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,SelfDestructingSolverStorable41 [2022-07-20 05:29:14,095 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:29:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:29:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2122268416, now seen corresponding path program 3 times [2022-07-20 05:29:14,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:29:14,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140524977] [2022-07-20 05:29:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:29:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:29:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:29:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:29:14,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:29:14,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140524977] [2022-07-20 05:29:14,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140524977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:29:14,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208990322] [2022-07-20 05:29:14,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:29:14,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:29:14,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:29:14,428 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 05:29:14,429 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 05:29:14,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 05:29:14,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:29:14,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-20 05:29:14,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:29:14,613 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 05:29:14,856 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:29:14,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:29:15,260 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-20 05:29:15,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-20 05:29:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 11 proven. 128 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:29:15,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:29:15,386 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1022 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1022) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-20 05:29:15,389 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:29:15,390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:29:15,396 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:29:15,396 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 37 treesize of output 37 [2022-07-20 05:29:15,399 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 11 treesize of output 7 [2022-07-20 05:29:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 129 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:29:15,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208990322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:29:15,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:29:15,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 40 [2022-07-20 05:29:15,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109528772] [2022-07-20 05:29:15,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:29:15,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 05:29:15,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:29:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 05:29:15,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1374, Unknown=1, NotChecked=74, Total=1560 [2022-07-20 05:29:15,591 INFO L87 Difference]: Start difference. First operand 2667 states and 3077 transitions. Second operand has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 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 05:29:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:29:16,159 INFO L93 Difference]: Finished difference Result 2524 states and 2863 transitions. [2022-07-20 05:29:16,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 05:29:16,159 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 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 82 [2022-07-20 05:29:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:29:16,163 INFO L225 Difference]: With dead ends: 2524 [2022-07-20 05:29:16,163 INFO L226 Difference]: Without dead ends: 1699 [2022-07-20 05:29:16,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=200, Invalid=2455, Unknown=1, NotChecked=100, Total=2756 [2022-07-20 05:29:16,163 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 92 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:29:16,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1460 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 712 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2022-07-20 05:29:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-07-20 05:29:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1150. [2022-07-20 05:29:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1148 states have (on average 1.1402439024390243) internal successors, (1309), 1149 states have internal predecessors, (1309), 0 states have call successors, (0), 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 05:29:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1309 transitions. [2022-07-20 05:29:16,177 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1309 transitions. Word has length 82 [2022-07-20 05:29:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:29:16,177 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 1309 transitions. [2022-07-20 05:29:16,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.7) internal successors, (148), 40 states have internal predecessors, (148), 0 states have call successors, (0), 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 05:29:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1309 transitions. [2022-07-20 05:29:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-20 05:29:16,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:29:16,180 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:29:16,207 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 05:29:16,403 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,SelfDestructingSolverStorable42 [2022-07-20 05:29:16,404 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:29:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:29:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash 701755736, now seen corresponding path program 10 times [2022-07-20 05:29:16,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:29:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83175413] [2022-07-20 05:29:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:29:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:29:16,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:29:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:29:16,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:29:16,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83175413] [2022-07-20 05:29:16,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83175413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:29:16,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576203698] [2022-07-20 05:29:16,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:29:16,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:29:16,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:29:16,919 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 05:29:16,920 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 05:29:17,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:29:17,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:29:17,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 114 conjunts are in the unsatisfiable core [2022-07-20 05:29:17,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:29:17,051 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:29:17,051 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 05:29:17,059 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 05:29:17,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:29:17,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:29:25,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:29:25,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:29:25,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 14 [2022-07-20 05:29:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 61 proven. 100 refuted. 16 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:29:25,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:29:26,942 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:29:26,943 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-20 05:29:26,953 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:29:26,953 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 40 treesize of output 40 [2022-07-20 05:29:26,960 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:29:26,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 30 [2022-07-20 05:29:27,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:29:27,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:29:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 102 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:29:27,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576203698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:29:27,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:29:27,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 77 [2022-07-20 05:29:27,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607680875] [2022-07-20 05:29:27,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:29:27,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-20 05:29:27,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:29:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-20 05:29:27,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=5445, Unknown=3, NotChecked=0, Total=5852 [2022-07-20 05:29:27,799 INFO L87 Difference]: Start difference. First operand 1150 states and 1309 transitions. Second operand has 77 states, 77 states have (on average 3.0779220779220777) internal successors, (237), 77 states have internal predecessors, (237), 0 states have call successors, (0), 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 05:30:43,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:43,879 INFO L93 Difference]: Finished difference Result 1513 states and 1706 transitions. [2022-07-20 05:30:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-20 05:30:43,879 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.0779220779220777) internal successors, (237), 77 states have internal predecessors, (237), 0 states have call successors, (0), 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 05:30:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:43,883 INFO L225 Difference]: With dead ends: 1513 [2022-07-20 05:30:43,883 INFO L226 Difference]: Without dead ends: 1462 [2022-07-20 05:30:43,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 128 SyntacticMatches, 10 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5602 ImplicationChecksByTransitivity, 85.3s TimeCoverageRelationStatistics Valid=1800, Invalid=20236, Unknown=16, NotChecked=0, Total=22052 [2022-07-20 05:30:43,885 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 360 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:43,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 1462 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 856 Invalid, 0 Unknown, 295 Unchecked, 0.3s Time] [2022-07-20 05:30:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2022-07-20 05:30:43,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1359. [2022-07-20 05:30:43,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1357 states have (on average 1.1363301400147383) internal successors, (1542), 1358 states have internal predecessors, (1542), 0 states have call successors, (0), 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 05:30:43,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1542 transitions. [2022-07-20 05:30:43,899 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1542 transitions. Word has length 85 [2022-07-20 05:30:43,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:43,900 INFO L495 AbstractCegarLoop]: Abstraction has 1359 states and 1542 transitions. [2022-07-20 05:30:43,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.0779220779220777) internal successors, (237), 77 states have internal predecessors, (237), 0 states have call successors, (0), 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 05:30:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1542 transitions. [2022-07-20 05:30:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-20 05:30:43,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:43,902 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:43,927 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 05:30:44,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:44,115 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:30:44,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:44,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1453961489, now seen corresponding path program 3 times [2022-07-20 05:30:44,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:44,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549026233] [2022-07-20 05:30:44,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:44,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:44,481 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:30:44,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:44,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549026233] [2022-07-20 05:30:44,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549026233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:44,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385340147] [2022-07-20 05:30:44,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:30:44,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:44,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:44,484 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 05:30:44,510 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 05:30:44,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-20 05:30:44,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:44,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-20 05:30:44,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:44,935 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 14 treesize of output 10 [2022-07-20 05:30:45,210 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 15 treesize of output 7 [2022-07-20 05:30:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:30:45,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:45,343 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 15 treesize of output 13 [2022-07-20 05:30:45,346 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 22 [2022-07-20 05:30:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 23 proven. 199 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:30:45,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385340147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:45,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:45,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 43 [2022-07-20 05:30:45,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531877576] [2022-07-20 05:30:45,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:45,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 05:30:45,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:45,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 05:30:45,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1676, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 05:30:45,532 INFO L87 Difference]: Start difference. First operand 1359 states and 1542 transitions. Second operand has 43 states, 43 states have (on average 3.488372093023256) internal successors, (150), 43 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:46,785 INFO L93 Difference]: Finished difference Result 2269 states and 2535 transitions. [2022-07-20 05:30:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 05:30:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.488372093023256) internal successors, (150), 43 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-20 05:30:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:46,789 INFO L225 Difference]: With dead ends: 2269 [2022-07-20 05:30:46,789 INFO L226 Difference]: Without dead ends: 1897 [2022-07-20 05:30:46,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 149 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=427, Invalid=3733, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 05:30:46,790 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 445 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:46,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 2230 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1699 Invalid, 0 Unknown, 218 Unchecked, 0.7s Time] [2022-07-20 05:30:46,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2022-07-20 05:30:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1422. [2022-07-20 05:30:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1420 states have (on average 1.134507042253521) internal successors, (1611), 1421 states have internal predecessors, (1611), 0 states have call successors, (0), 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 05:30:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1611 transitions. [2022-07-20 05:30:46,802 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1611 transitions. Word has length 87 [2022-07-20 05:30:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:46,802 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1611 transitions. [2022-07-20 05:30:46,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.488372093023256) internal successors, (150), 43 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:46,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1611 transitions. [2022-07-20 05:30:46,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-20 05:30:46,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:46,804 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:46,835 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 05:30:47,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:47,018 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:30:47,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash 303608411, now seen corresponding path program 11 times [2022-07-20 05:30:47,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:47,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362464437] [2022-07-20 05:30:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:47,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:47,270 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:47,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:47,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362464437] [2022-07-20 05:30:47,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362464437] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:47,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280025074] [2022-07-20 05:30:47,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:30:47,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:47,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:47,273 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 05:30:47,274 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 05:30:47,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 05:30:47,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:47,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-20 05:30:47,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:47,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:48,076 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 22 treesize of output 18 [2022-07-20 05:30:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:48,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280025074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:48,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:48,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-07-20 05:30:48,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393696521] [2022-07-20 05:30:48,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:48,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 05:30:48,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:48,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 05:30:48,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 05:30:48,324 INFO L87 Difference]: Start difference. First operand 1422 states and 1611 transitions. Second operand has 44 states, 43 states have (on average 4.906976744186046) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 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 05:30:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:49,182 INFO L93 Difference]: Finished difference Result 2503 states and 2842 transitions. [2022-07-20 05:30:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-20 05:30:49,183 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.906976744186046) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 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 89 [2022-07-20 05:30:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:49,188 INFO L225 Difference]: With dead ends: 2503 [2022-07-20 05:30:49,189 INFO L226 Difference]: Without dead ends: 2503 [2022-07-20 05:30:49,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=898, Invalid=3392, Unknown=0, NotChecked=0, Total=4290 [2022-07-20 05:30:49,190 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 374 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1364 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:49,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1364 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:30:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-07-20 05:30:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 1559. [2022-07-20 05:30:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1557 states have (on average 1.1361592806679512) internal successors, (1769), 1558 states have internal predecessors, (1769), 0 states have call successors, (0), 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 05:30:49,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 1769 transitions. [2022-07-20 05:30:49,205 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 1769 transitions. Word has length 89 [2022-07-20 05:30:49,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:49,206 INFO L495 AbstractCegarLoop]: Abstraction has 1559 states and 1769 transitions. [2022-07-20 05:30:49,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.906976744186046) internal successors, (211), 44 states have internal predecessors, (211), 0 states have call successors, (0), 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 05:30:49,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 1769 transitions. [2022-07-20 05:30:49,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 05:30:49,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:49,208 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:49,235 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 05:30:49,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:49,423 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:30:49,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:49,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1418653548, now seen corresponding path program 4 times [2022-07-20 05:30:49,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:49,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974722241] [2022-07-20 05:30:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:49,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:49,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 45 proven. 202 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:30:49,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:49,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974722241] [2022-07-20 05:30:49,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974722241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:49,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362704487] [2022-07-20 05:30:49,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:30:49,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:49,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:49,784 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 05:30:49,785 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 05:30:49,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:30:49,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:49,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-20 05:30:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:49,922 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:30:49,923 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 05:30:50,323 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 16 treesize of output 12 [2022-07-20 05:30:50,933 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:30:50,933 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 21 treesize of output 21 [2022-07-20 05:30:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 72 proven. 175 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:30:51,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:52,061 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 15 treesize of output 13 [2022-07-20 05:30:52,065 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 22 [2022-07-20 05:30:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 91 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:30:53,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362704487] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:53,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:53,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 25] total 69 [2022-07-20 05:30:53,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695944234] [2022-07-20 05:30:53,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:53,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-20 05:30:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:53,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-20 05:30:53,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=4391, Unknown=0, NotChecked=0, Total=4830 [2022-07-20 05:30:53,121 INFO L87 Difference]: Start difference. First operand 1559 states and 1769 transitions. Second operand has 70 states, 69 states have (on average 3.753623188405797) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:56,919 INFO L93 Difference]: Finished difference Result 2688 states and 3008 transitions. [2022-07-20 05:30:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-20 05:30:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.753623188405797) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-20 05:30:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:56,925 INFO L225 Difference]: With dead ends: 2688 [2022-07-20 05:30:56,926 INFO L226 Difference]: Without dead ends: 2688 [2022-07-20 05:30:56,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2607, Invalid=11913, Unknown=0, NotChecked=0, Total=14520 [2022-07-20 05:30:56,927 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 850 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1428 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:56,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [850 Valid, 1428 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2032 Invalid, 0 Unknown, 239 Unchecked, 1.0s Time] [2022-07-20 05:30:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2688 states. [2022-07-20 05:30:56,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2688 to 1659. [2022-07-20 05:30:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1657 states have (on average 1.1388050694025347) internal successors, (1887), 1658 states have internal predecessors, (1887), 0 states have call successors, (0), 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 05:30:56,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 1887 transitions. [2022-07-20 05:30:56,953 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 1887 transitions. Word has length 91 [2022-07-20 05:30:56,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:56,953 INFO L495 AbstractCegarLoop]: Abstraction has 1659 states and 1887 transitions. [2022-07-20 05:30:56,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.753623188405797) internal successors, (259), 70 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:56,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 1887 transitions. [2022-07-20 05:30:56,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-20 05:30:56,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:56,955 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:56,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 05:30:57,155 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,SelfDestructingSolverStorable46 [2022-07-20 05:30:57,156 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:30:57,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:57,156 INFO L85 PathProgramCache]: Analyzing trace with hash -157062976, now seen corresponding path program 4 times [2022-07-20 05:30:57,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:57,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243563201] [2022-07-20 05:30:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:57,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 190 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 05:30:57,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243563201] [2022-07-20 05:30:57,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243563201] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692594281] [2022-07-20 05:30:57,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:30:57,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:57,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:57,711 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 05:30:57,712 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 05:30:57,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:30:57,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:57,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 115 conjunts are in the unsatisfiable core [2022-07-20 05:30:57,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:57,870 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:30:57,871 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 05:30:58,603 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 13 treesize of output 9 [2022-07-20 05:30:58,677 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:30:58,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 05:30:58,683 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 7 treesize of output 3 [2022-07-20 05:31:00,860 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:31:00,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 23 treesize of output 19 [2022-07-20 05:31:01,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:31:01,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-07-20 05:31:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 114 proven. 94 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 05:31:01,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:02,772 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:02,772 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2022-07-20 05:31:02,780 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:02,780 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 40 treesize of output 40 [2022-07-20 05:31:02,787 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:02,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 30 treesize of output 30 [2022-07-20 05:31:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 88 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 05:31:04,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692594281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:04,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:04,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 35, 35] total 90 [2022-07-20 05:31:04,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947107891] [2022-07-20 05:31:04,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:04,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-07-20 05:31:04,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:04,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-07-20 05:31:04,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=7470, Unknown=8, NotChecked=0, Total=8010 [2022-07-20 05:31:04,096 INFO L87 Difference]: Start difference. First operand 1659 states and 1887 transitions. Second operand has 90 states, 90 states have (on average 2.7555555555555555) internal successors, (248), 90 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 05:31:11,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:11,675 INFO L93 Difference]: Finished difference Result 3259 states and 3724 transitions. [2022-07-20 05:31:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-07-20 05:31:11,675 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.7555555555555555) internal successors, (248), 90 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 94 [2022-07-20 05:31:11,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:11,680 INFO L225 Difference]: With dead ends: 3259 [2022-07-20 05:31:11,680 INFO L226 Difference]: Without dead ends: 3259 [2022-07-20 05:31:11,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11702 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=2857, Invalid=38955, Unknown=8, NotChecked=0, Total=41820 [2022-07-20 05:31:11,683 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 610 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 2760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1274 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:11,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 1618 Invalid, 2760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1388 Invalid, 0 Unknown, 1274 Unchecked, 0.6s Time] [2022-07-20 05:31:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3259 states. [2022-07-20 05:31:11,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3259 to 2404. [2022-07-20 05:31:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2404 states, 2402 states have (on average 1.1486261448792672) internal successors, (2759), 2403 states have internal predecessors, (2759), 0 states have call successors, (0), 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 05:31:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2404 states to 2404 states and 2759 transitions. [2022-07-20 05:31:11,710 INFO L78 Accepts]: Start accepts. Automaton has 2404 states and 2759 transitions. Word has length 94 [2022-07-20 05:31:11,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:11,711 INFO L495 AbstractCegarLoop]: Abstraction has 2404 states and 2759 transitions. [2022-07-20 05:31:11,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.7555555555555555) internal successors, (248), 90 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 05:31:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2404 states and 2759 transitions. [2022-07-20 05:31:11,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-20 05:31:11,713 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:11,713 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:11,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-20 05:31:11,913 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,SelfDestructingSolverStorable47 [2022-07-20 05:31:11,914 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:31:11,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:11,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1786250318, now seen corresponding path program 5 times [2022-07-20 05:31:11,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:11,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222918357] [2022-07-20 05:31:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:11,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:11,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 12 proven. 191 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:31:12,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:12,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222918357] [2022-07-20 05:31:12,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222918357] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:12,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734463672] [2022-07-20 05:31:12,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:31:12,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:12,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:12,249 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 05:31:12,249 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 05:31:12,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 05:31:12,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:31:12,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 108 conjunts are in the unsatisfiable core [2022-07-20 05:31:12,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:31:12,405 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 05:31:12,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:31:12,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:31:13,324 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:13,325 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 17 [2022-07-20 05:31:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 29 proven. 174 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:31:13,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:14,379 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:14,380 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:31:14,384 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:14,384 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 37 treesize of output 37 [2022-07-20 05:31:14,386 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 11 treesize of output 7 [2022-07-20 05:31:14,393 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 22 treesize of output 18 [2022-07-20 05:31:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 28 proven. 175 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:31:14,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734463672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:14,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:14,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 63 [2022-07-20 05:31:14,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637243463] [2022-07-20 05:31:14,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:14,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-20 05:31:14,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:14,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-20 05:31:14,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=3607, Unknown=1, NotChecked=0, Total=3906 [2022-07-20 05:31:14,865 INFO L87 Difference]: Start difference. First operand 2404 states and 2759 transitions. Second operand has 63 states, 63 states have (on average 4.015873015873016) internal successors, (253), 63 states have internal predecessors, (253), 0 states have call successors, (0), 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 05:31:18,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:18,742 INFO L93 Difference]: Finished difference Result 3640 states and 4088 transitions. [2022-07-20 05:31:18,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-20 05:31:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.015873015873016) internal successors, (253), 63 states have internal predecessors, (253), 0 states have call successors, (0), 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 94 [2022-07-20 05:31:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:18,746 INFO L225 Difference]: With dead ends: 3640 [2022-07-20 05:31:18,747 INFO L226 Difference]: Without dead ends: 2611 [2022-07-20 05:31:18,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4276 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1524, Invalid=17657, Unknown=1, NotChecked=0, Total=19182 [2022-07-20 05:31:18,748 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 543 mSDsluCounter, 2785 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 2067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:18,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [543 Valid, 2906 Invalid, 2067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1775 Invalid, 0 Unknown, 247 Unchecked, 0.7s Time] [2022-07-20 05:31:18,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2022-07-20 05:31:18,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 1500. [2022-07-20 05:31:18,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1498 states have (on average 1.1428571428571428) internal successors, (1712), 1499 states have internal predecessors, (1712), 0 states have call successors, (0), 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 05:31:18,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 1712 transitions. [2022-07-20 05:31:18,766 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 1712 transitions. Word has length 94 [2022-07-20 05:31:18,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:18,767 INFO L495 AbstractCegarLoop]: Abstraction has 1500 states and 1712 transitions. [2022-07-20 05:31:18,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.015873015873016) internal successors, (253), 63 states have internal predecessors, (253), 0 states have call successors, (0), 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 05:31:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 1712 transitions. [2022-07-20 05:31:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 05:31:18,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:18,769 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:18,795 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 05:31:18,983 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,SelfDestructingSolverStorable48 [2022-07-20 05:31:18,983 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:31:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:18,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2077401446, now seen corresponding path program 12 times [2022-07-20 05:31:18,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:18,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285192695] [2022-07-20 05:31:18,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:18,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:19,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:31:19,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:19,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285192695] [2022-07-20 05:31:19,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285192695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:19,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829779236] [2022-07-20 05:31:19,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:31:19,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:19,519 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 05:31:19,520 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 05:31:19,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 05:31:19,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:31:19,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 149 conjunts are in the unsatisfiable core [2022-07-20 05:31:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:31:19,727 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 05:31:20,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:31:20,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:31:21,830 INFO L356 Elim1Store]: treesize reduction 32, result has 8.6 percent of original size [2022-07-20 05:31:21,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 20 [2022-07-20 05:31:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:31:21,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:22,840 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1370 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1370) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse0 (select v_ArrVal_1370 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= .cse0 (select .cse1 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= (select .cse1 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse0)) (= .cse0 0)))) is different from false [2022-07-20 05:31:22,845 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:22,845 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2022-07-20 05:31:22,860 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-20 05:31:22,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 73 [2022-07-20 05:31:22,876 INFO L356 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-07-20 05:31:22,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 60 [2022-07-20 05:31:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 30 proven. 218 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:31:23,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829779236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:23,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:23,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 33] total 85 [2022-07-20 05:31:23,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894977896] [2022-07-20 05:31:23,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:23,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-20 05:31:23,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-20 05:31:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=6643, Unknown=1, NotChecked=164, Total=7140 [2022-07-20 05:31:23,695 INFO L87 Difference]: Start difference. First operand 1500 states and 1712 transitions. Second operand has 85 states, 85 states have (on average 3.0941176470588236) internal successors, (263), 85 states have internal predecessors, (263), 0 states have call successors, (0), 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 05:31:25,325 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)))) (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (or (and .cse0 (= 7 |c_ULTIMATE.start_main_~length1~0#1|)) (and .cse0 (= 5 |c_ULTIMATE.start_main_~length1~0#1|))) .cse0 (= |c_ULTIMATE.start_main_~i~0#1| 4) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (forall ((v_ArrVal_1370 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1370) |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_1370 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= .cse1 (select .cse2 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (not (= (select .cse2 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse1)) (= .cse1 0)))) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)) (.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (not (= .cse3 (select .cse4 (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) (= .cse3 0) (not (= .cse3 (select .cse4 (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))))) (<= 4 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-07-20 05:31:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:27,424 INFO L93 Difference]: Finished difference Result 3272 states and 3719 transitions. [2022-07-20 05:31:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-20 05:31:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.0941176470588236) internal successors, (263), 85 states have internal predecessors, (263), 0 states have call successors, (0), 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 97 [2022-07-20 05:31:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:27,429 INFO L225 Difference]: With dead ends: 3272 [2022-07-20 05:31:27,429 INFO L226 Difference]: Without dead ends: 3213 [2022-07-20 05:31:27,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3497 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=883, Invalid=18305, Unknown=2, NotChecked=550, Total=19740 [2022-07-20 05:31:27,431 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 448 mSDsluCounter, 4249 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 4390 SdHoareTripleChecker+Invalid, 4468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1848 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:27,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 4390 Invalid, 4468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2588 Invalid, 0 Unknown, 1848 Unchecked, 1.1s Time] [2022-07-20 05:31:27,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3213 states. [2022-07-20 05:31:27,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3213 to 2674. [2022-07-20 05:31:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2672 states have (on average 1.1497005988023952) internal successors, (3072), 2673 states have internal predecessors, (3072), 0 states have call successors, (0), 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 05:31:27,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3072 transitions. [2022-07-20 05:31:27,458 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3072 transitions. Word has length 97 [2022-07-20 05:31:27,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:27,459 INFO L495 AbstractCegarLoop]: Abstraction has 2674 states and 3072 transitions. [2022-07-20 05:31:27,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.0941176470588236) internal successors, (263), 85 states have internal predecessors, (263), 0 states have call successors, (0), 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 05:31:27,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3072 transitions. [2022-07-20 05:31:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 05:31:27,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:27,462 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:27,488 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 05:31:27,675 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,SelfDestructingSolverStorable49 [2022-07-20 05:31:27,675 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:31:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:27,675 INFO L85 PathProgramCache]: Analyzing trace with hash -82780620, now seen corresponding path program 5 times [2022-07-20 05:31:27,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:27,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705023943] [2022-07-20 05:31:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:27,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 180 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:27,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:27,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705023943] [2022-07-20 05:31:27,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705023943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:27,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809788462] [2022-07-20 05:31:27,996 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:31:27,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:27,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:28,000 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 05:31:28,023 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 05:31:28,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-20 05:31:28,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:31:28,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-20 05:31:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:31:28,194 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:31:28,194 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 05:31:28,785 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 195 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:28,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 195 proven. 141 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:29,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809788462] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:29,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:29,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 58 [2022-07-20 05:31:29,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636841158] [2022-07-20 05:31:29,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:29,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-20 05:31:29,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:29,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-20 05:31:29,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2789, Unknown=0, NotChecked=0, Total=3306 [2022-07-20 05:31:29,243 INFO L87 Difference]: Start difference. First operand 2674 states and 3072 transitions. Second operand has 58 states, 58 states have (on average 4.120689655172414) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 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 05:31:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:31,196 INFO L93 Difference]: Finished difference Result 5796 states and 6484 transitions. [2022-07-20 05:31:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-20 05:31:31,197 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.120689655172414) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 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 101 [2022-07-20 05:31:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:31,203 INFO L225 Difference]: With dead ends: 5796 [2022-07-20 05:31:31,203 INFO L226 Difference]: Without dead ends: 5196 [2022-07-20 05:31:31,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3996 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3282, Invalid=10998, Unknown=0, NotChecked=0, Total=14280 [2022-07-20 05:31:31,204 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 574 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 1330 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:31,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [574 Valid, 1185 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1330 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 05:31:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5196 states. [2022-07-20 05:31:31,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5196 to 3378. [2022-07-20 05:31:31,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3376 states have (on average 1.151362559241706) internal successors, (3887), 3377 states have internal predecessors, (3887), 0 states have call successors, (0), 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 05:31:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 3887 transitions. [2022-07-20 05:31:31,231 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 3887 transitions. Word has length 101 [2022-07-20 05:31:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:31,232 INFO L495 AbstractCegarLoop]: Abstraction has 3378 states and 3887 transitions. [2022-07-20 05:31:31,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.120689655172414) internal successors, (239), 58 states have internal predecessors, (239), 0 states have call successors, (0), 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 05:31:31,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 3887 transitions. [2022-07-20 05:31:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 05:31:31,235 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:31,235 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:31,261 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 05:31:31,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:31,451 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:31:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1316555287, now seen corresponding path program 13 times [2022-07-20 05:31:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25310273] [2022-07-20 05:31:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:31:31,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:31,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25310273] [2022-07-20 05:31:31,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25310273] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:31,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542554571] [2022-07-20 05:31:31,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:31:31,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:31,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:31,744 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 05:31:31,745 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 05:31:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:31,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-20 05:31:31,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:31:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:31:32,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:32,613 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 5 treesize of output 3 [2022-07-20 05:31:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:31:32,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542554571] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:32,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:32,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 42 [2022-07-20 05:31:32,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213009361] [2022-07-20 05:31:32,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:32,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-20 05:31:32,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:32,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-20 05:31:32,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2022-07-20 05:31:32,662 INFO L87 Difference]: Start difference. First operand 3378 states and 3887 transitions. Second operand has 43 states, 42 states have (on average 4.833333333333333) internal successors, (203), 43 states have internal predecessors, (203), 0 states have call successors, (0), 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 05:31:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:33,779 INFO L93 Difference]: Finished difference Result 4259 states and 4882 transitions. [2022-07-20 05:31:33,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 05:31:33,780 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.833333333333333) internal successors, (203), 43 states have internal predecessors, (203), 0 states have call successors, (0), 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 101 [2022-07-20 05:31:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:33,787 INFO L225 Difference]: With dead ends: 4259 [2022-07-20 05:31:33,787 INFO L226 Difference]: Without dead ends: 4259 [2022-07-20 05:31:33,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=861, Invalid=3695, Unknown=0, NotChecked=0, Total=4556 [2022-07-20 05:31:33,790 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 579 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:33,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1670 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1397 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 05:31:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2022-07-20 05:31:33,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 3563. [2022-07-20 05:31:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3561 states have (on average 1.1516427969671441) internal successors, (4101), 3562 states have internal predecessors, (4101), 0 states have call successors, (0), 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 05:31:33,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 4101 transitions. [2022-07-20 05:31:33,831 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 4101 transitions. Word has length 101 [2022-07-20 05:31:33,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:33,831 INFO L495 AbstractCegarLoop]: Abstraction has 3563 states and 4101 transitions. [2022-07-20 05:31:33,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.833333333333333) internal successors, (203), 43 states have internal predecessors, (203), 0 states have call successors, (0), 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 05:31:33,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 4101 transitions. [2022-07-20 05:31:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-20 05:31:33,835 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:33,835 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:33,862 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 05:31:34,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:34,048 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:31:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1330470007, now seen corresponding path program 6 times [2022-07-20 05:31:34,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:34,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130427282] [2022-07-20 05:31:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:34,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:34,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:34,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130427282] [2022-07-20 05:31:34,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130427282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:34,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116523022] [2022-07-20 05:31:34,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:31:34,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:34,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:34,443 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 05:31:34,444 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 05:31:34,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-20 05:31:34,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:31:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-20 05:31:34,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:31:34,888 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 14 treesize of output 10 [2022-07-20 05:31:35,102 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 15 treesize of output 7 [2022-07-20 05:31:35,105 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:35,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:35,239 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 15 treesize of output 13 [2022-07-20 05:31:35,241 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 22 [2022-07-20 05:31:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 29 proven. 336 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:35,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116523022] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:35,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:35,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 48 [2022-07-20 05:31:35,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867502926] [2022-07-20 05:31:35,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:35,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-20 05:31:35,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:35,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-20 05:31:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 05:31:35,495 INFO L87 Difference]: Start difference. First operand 3563 states and 4101 transitions. Second operand has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 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 05:31:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:37,428 INFO L93 Difference]: Finished difference Result 6085 states and 6907 transitions. [2022-07-20 05:31:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 05:31:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 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 105 [2022-07-20 05:31:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:37,434 INFO L225 Difference]: With dead ends: 6085 [2022-07-20 05:31:37,434 INFO L226 Difference]: Without dead ends: 5431 [2022-07-20 05:31:37,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 183 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=523, Invalid=4733, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 05:31:37,435 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 601 mSDsluCounter, 3738 mSDsCounter, 0 mSdLazyCounter, 3104 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 3884 SdHoareTripleChecker+Invalid, 3320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 3104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:37,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [601 Valid, 3884 Invalid, 3320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 3104 Invalid, 0 Unknown, 150 Unchecked, 1.2s Time] [2022-07-20 05:31:37,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2022-07-20 05:31:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 3591. [2022-07-20 05:31:37,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3591 states, 3589 states have (on average 1.1510169963778212) internal successors, (4131), 3590 states have internal predecessors, (4131), 0 states have call successors, (0), 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 05:31:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3591 states to 3591 states and 4131 transitions. [2022-07-20 05:31:37,478 INFO L78 Accepts]: Start accepts. Automaton has 3591 states and 4131 transitions. Word has length 105 [2022-07-20 05:31:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:37,478 INFO L495 AbstractCegarLoop]: Abstraction has 3591 states and 4131 transitions. [2022-07-20 05:31:37,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.625) internal successors, (174), 48 states have internal predecessors, (174), 0 states have call successors, (0), 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 05:31:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3591 states and 4131 transitions. [2022-07-20 05:31:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-20 05:31:37,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:37,481 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:37,509 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 05:31:37,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:37,695 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:31:37,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:37,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1106575132, now seen corresponding path program 6 times [2022-07-20 05:31:37,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:37,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362994891] [2022-07-20 05:31:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:37,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 271 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:38,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:38,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362994891] [2022-07-20 05:31:38,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362994891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:38,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294528638] [2022-07-20 05:31:38,329 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:31:38,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:38,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:38,330 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 05:31:38,331 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 05:31:38,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 05:31:38,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:31:38,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-20 05:31:38,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:31:38,561 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 05:31:38,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:31:38,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:31:39,161 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 15 treesize of output 7 [2022-07-20 05:31:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 15 proven. 264 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:31:39,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:39,332 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1582 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1582) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-07-20 05:31:39,336 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:39,336 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-20 05:31:39,341 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:39,341 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 37 treesize of output 37 [2022-07-20 05:31:39,343 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 11 treesize of output 7 [2022-07-20 05:31:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 14 proven. 265 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 05:31:39,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294528638] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:39,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:39,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 24] total 46 [2022-07-20 05:31:39,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265020417] [2022-07-20 05:31:39,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:39,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 05:31:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 05:31:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1867, Unknown=1, NotChecked=86, Total=2070 [2022-07-20 05:31:39,676 INFO L87 Difference]: Start difference. First operand 3591 states and 4131 transitions. Second operand has 46 states, 46 states have (on average 3.282608695652174) internal successors, (151), 46 states have internal predecessors, (151), 0 states have call successors, (0), 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 05:31:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:42,352 INFO L93 Difference]: Finished difference Result 4082 states and 4628 transitions. [2022-07-20 05:31:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 05:31:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.282608695652174) internal successors, (151), 46 states have internal predecessors, (151), 0 states have call successors, (0), 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 106 [2022-07-20 05:31:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:42,355 INFO L225 Difference]: With dead ends: 4082 [2022-07-20 05:31:42,355 INFO L226 Difference]: Without dead ends: 2993 [2022-07-20 05:31:42,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 188 SyntacticMatches, 8 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1111 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=544, Invalid=6265, Unknown=1, NotChecked=162, Total=6972 [2022-07-20 05:31:42,356 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 794 mSDsluCounter, 4145 mSDsCounter, 0 mSdLazyCounter, 3026 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 4313 SdHoareTripleChecker+Invalid, 3437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:42,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 4313 Invalid, 3437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3026 Invalid, 0 Unknown, 325 Unchecked, 1.2s Time] [2022-07-20 05:31:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2022-07-20 05:31:42,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 2142. [2022-07-20 05:31:42,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2140 states have (on average 1.1439252336448598) internal successors, (2448), 2141 states have internal predecessors, (2448), 0 states have call successors, (0), 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 05:31:42,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2448 transitions. [2022-07-20 05:31:42,385 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2448 transitions. Word has length 106 [2022-07-20 05:31:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:42,386 INFO L495 AbstractCegarLoop]: Abstraction has 2142 states and 2448 transitions. [2022-07-20 05:31:42,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.282608695652174) internal successors, (151), 46 states have internal predecessors, (151), 0 states have call successors, (0), 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 05:31:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2448 transitions. [2022-07-20 05:31:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 05:31:42,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:42,389 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:42,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-20 05:31:42,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:42,607 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:31:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:42,607 INFO L85 PathProgramCache]: Analyzing trace with hash 415957306, now seen corresponding path program 7 times [2022-07-20 05:31:42,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:42,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146857303] [2022-07-20 05:31:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:42,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 91 proven. 307 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:43,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146857303] [2022-07-20 05:31:43,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146857303] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:43,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161908764] [2022-07-20 05:31:43,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:31:43,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:43,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:43,068 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:31:43,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-20 05:31:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:43,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 99 conjunts are in the unsatisfiable core [2022-07-20 05:31:43,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:31:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 120 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:43,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:44,206 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 5 treesize of output 3 [2022-07-20 05:31:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 120 proven. 278 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:44,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161908764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:44,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:44,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 54 [2022-07-20 05:31:44,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103168470] [2022-07-20 05:31:44,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:44,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-20 05:31:44,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:44,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-20 05:31:44,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=2661, Unknown=0, NotChecked=0, Total=2970 [2022-07-20 05:31:44,261 INFO L87 Difference]: Start difference. First operand 2142 states and 2448 transitions. Second operand has 55 states, 54 states have (on average 4.12962962962963) internal successors, (223), 55 states have internal predecessors, (223), 0 states have call successors, (0), 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 05:31:46,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:46,185 INFO L93 Difference]: Finished difference Result 3673 states and 4151 transitions. [2022-07-20 05:31:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-20 05:31:46,185 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 4.12962962962963) internal successors, (223), 55 states have internal predecessors, (223), 0 states have call successors, (0), 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 109 [2022-07-20 05:31:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:46,189 INFO L225 Difference]: With dead ends: 3673 [2022-07-20 05:31:46,189 INFO L226 Difference]: Without dead ends: 3673 [2022-07-20 05:31:46,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1377, Invalid=5933, Unknown=0, NotChecked=0, Total=7310 [2022-07-20 05:31:46,190 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 703 mSDsluCounter, 1857 mSDsCounter, 0 mSdLazyCounter, 2696 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:46,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 1937 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2696 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 05:31:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2022-07-20 05:31:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 2207. [2022-07-20 05:31:46,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 2205 states have (on average 1.145124716553288) internal successors, (2525), 2206 states have internal predecessors, (2525), 0 states have call successors, (0), 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 05:31:46,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 2525 transitions. [2022-07-20 05:31:46,217 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 2525 transitions. Word has length 109 [2022-07-20 05:31:46,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:46,217 INFO L495 AbstractCegarLoop]: Abstraction has 2207 states and 2525 transitions. [2022-07-20 05:31:46,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 4.12962962962963) internal successors, (223), 55 states have internal predecessors, (223), 0 states have call successors, (0), 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 05:31:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 2525 transitions. [2022-07-20 05:31:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 05:31:46,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:46,219 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:46,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-20 05:31:46,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-20 05:31:46,435 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:31:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:46,436 INFO L85 PathProgramCache]: Analyzing trace with hash -196905228, now seen corresponding path program 14 times [2022-07-20 05:31:46,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:46,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435080361] [2022-07-20 05:31:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:46,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:31:47,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435080361] [2022-07-20 05:31:47,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435080361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:47,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234617676] [2022-07-20 05:31:47,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:31:47,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:47,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:47,128 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:31:47,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-20 05:31:47,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:31:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:31:47,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 151 conjunts are in the unsatisfiable core [2022-07-20 05:31:47,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:31:47,295 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 05:31:47,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 10 [2022-07-20 05:31:47,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-20 05:31:49,300 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-20 05:31:49,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2022-07-20 05:31:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:31:49,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:50,080 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1695 (Array Int Int))) (let ((.cse0 (select v_ArrVal_1695 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (= .cse0 0) (not (= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1695) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))))))) is different from false [2022-07-20 05:31:50,085 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:50,086 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-20 05:31:50,090 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:50,090 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 44 treesize of output 44 [2022-07-20 05:31:50,098 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:31:50,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 32 treesize of output 32 [2022-07-20 05:31:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 21 proven. 310 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:31:50,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234617676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:50,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:50,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 34] total 86 [2022-07-20 05:31:50,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94352219] [2022-07-20 05:31:50,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:50,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-20 05:31:50,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:50,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-20 05:31:50,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=6849, Unknown=1, NotChecked=166, Total=7310 [2022-07-20 05:31:50,781 INFO L87 Difference]: Start difference. First operand 2207 states and 2525 transitions. Second operand has 86 states, 86 states have (on average 3.2906976744186047) internal successors, (283), 86 states have internal predecessors, (283), 0 states have call successors, (0), 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 05:31:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:52,723 INFO L93 Difference]: Finished difference Result 4326 states and 4960 transitions. [2022-07-20 05:31:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-20 05:31:52,724 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.2906976744186047) internal successors, (283), 86 states have internal predecessors, (283), 0 states have call successors, (0), 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 109 [2022-07-20 05:31:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:52,727 INFO L225 Difference]: With dead ends: 4326 [2022-07-20 05:31:52,727 INFO L226 Difference]: Without dead ends: 4259 [2022-07-20 05:31:52,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2265 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=517, Invalid=12141, Unknown=2, NotChecked=222, Total=12882 [2022-07-20 05:31:52,728 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 244 mSDsluCounter, 2944 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 3030 SdHoareTripleChecker+Invalid, 2367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:52,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 3030 Invalid, 2367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1758 Invalid, 0 Unknown, 592 Unchecked, 0.7s Time] [2022-07-20 05:31:52,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2022-07-20 05:31:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 4006. [2022-07-20 05:31:52,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4006 states, 4004 states have (on average 1.1545954045954046) internal successors, (4623), 4005 states have internal predecessors, (4623), 0 states have call successors, (0), 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 05:31:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4006 states to 4006 states and 4623 transitions. [2022-07-20 05:31:52,756 INFO L78 Accepts]: Start accepts. Automaton has 4006 states and 4623 transitions. Word has length 109 [2022-07-20 05:31:52,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:52,757 INFO L495 AbstractCegarLoop]: Abstraction has 4006 states and 4623 transitions. [2022-07-20 05:31:52,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.2906976744186047) internal successors, (283), 86 states have internal predecessors, (283), 0 states have call successors, (0), 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 05:31:52,757 INFO L276 IsEmpty]: Start isEmpty. Operand 4006 states and 4623 transitions. [2022-07-20 05:31:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 05:31:52,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:52,760 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:52,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-20 05:31:52,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-20 05:31:52,975 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-20 05:31:52,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:52,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1193680631, now seen corresponding path program 15 times [2022-07-20 05:31:52,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:52,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153281819] [2022-07-20 05:31:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:52,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 66 proven. 294 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:31:53,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:53,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153281819] [2022-07-20 05:31:53,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153281819] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:53,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720103555] [2022-07-20 05:31:53,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:31:53,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:53,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:53,340 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:31:53,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-20 05:31:53,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-20 05:31:53,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:31:53,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-20 05:31:53,624 INFO L286 TraceCheckSpWp]: Computing forward predicates...