./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.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 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 16:55:21,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 16:55:21,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 16:55:21,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 16:55:21,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 16:55:21,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 16:55:21,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 16:55:21,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 16:55:21,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 16:55:21,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 16:55:21,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 16:55:21,974 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 16:55:21,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 16:55:21,976 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 16:55:21,977 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 16:55:21,979 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 16:55:21,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 16:55:21,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 16:55:21,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 16:55:21,987 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 16:55:21,988 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 16:55:21,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 16:55:21,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 16:55:21,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 16:55:21,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 16:55:21,997 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 16:55:21,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 16:55:21,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 16:55:21,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 16:55:21,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 16:55:21,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 16:55:22,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 16:55:22,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 16:55:22,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 16:55:22,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 16:55:22,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 16:55:22,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 16:55:22,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 16:55:22,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 16:55:22,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 16:55:22,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 16:55:22,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 16:55:22,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-21 16:55:22,038 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 16:55:22,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 16:55:22,039 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 16:55:22,039 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 16:55:22,040 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 16:55:22,040 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 16:55:22,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 16:55:22,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 16:55:22,041 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 16:55:22,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 16:55:22,042 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 16:55:22,042 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-21 16:55:22,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 16:55:22,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 16:55:22,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 16:55:22,042 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-21 16:55:22,043 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-21 16:55:22,043 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-21 16:55:22,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 16:55:22,043 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 16:55:22,043 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 16:55:22,043 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 16:55:22,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 16:55:22,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 16:55:22,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 16:55:22,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:55:22,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 16:55:22,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 16:55:22,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 16:55:22,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 16:55:22,045 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd [2022-07-21 16:55:22,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 16:55:22,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 16:55:22,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 16:55:22,368 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 16:55:22,369 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 16:55:22,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2022-07-21 16:55:22,417 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c2657f5f/77fa90e3f5064ee79ddb779455a6920b/FLAG395d0b100 [2022-07-21 16:55:22,820 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 16:55:22,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2022-07-21 16:55:22,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c2657f5f/77fa90e3f5064ee79ddb779455a6920b/FLAG395d0b100 [2022-07-21 16:55:23,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c2657f5f/77fa90e3f5064ee79ddb779455a6920b [2022-07-21 16:55:23,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 16:55:23,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 16:55:23,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 16:55:23,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 16:55:23,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 16:55:23,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de754df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23, skipping insertion in model container [2022-07-21 16:55:23,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 16:55:23,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 16:55:23,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:55:23,470 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 16:55:23,495 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 16:55:23,511 INFO L208 MainTranslator]: Completed translation [2022-07-21 16:55:23,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23 WrapperNode [2022-07-21 16:55:23,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 16:55:23,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 16:55:23,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 16:55:23,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 16:55:23,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,540 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2022-07-21 16:55:23,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 16:55:23,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 16:55:23,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 16:55:23,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 16:55:23,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,550 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 16:55:23,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 16:55:23,561 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 16:55:23,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 16:55:23,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (1/1) ... [2022-07-21 16:55:23,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 16:55:23,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:23,588 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 16:55:23,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 16:55:23,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 16:55:23,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 16:55:23,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 16:55:23,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 16:55:23,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 16:55:23,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 16:55:23,676 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 16:55:23,677 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 16:55:23,863 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 16:55:23,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 16:55:23,867 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-21 16:55:23,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:55:23 BoogieIcfgContainer [2022-07-21 16:55:23,869 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 16:55:23,870 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 16:55:23,870 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 16:55:23,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 16:55:23,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:55:23" (1/3) ... [2022-07-21 16:55:23,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397b34b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:55:23, skipping insertion in model container [2022-07-21 16:55:23,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:55:23" (2/3) ... [2022-07-21 16:55:23,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397b34b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:55:23, skipping insertion in model container [2022-07-21 16:55:23,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:55:23" (3/3) ... [2022-07-21 16:55:23,874 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2022-07-21 16:55:23,884 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 16:55:23,884 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-21 16:55:23,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 16:55:23,918 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@28fa3f39, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@40c6d746 [2022-07-21 16:55:23,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-21 16:55:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:23,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:55:23,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:23,927 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:23,927 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:23,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:23,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-21 16:55:23,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:23,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482192004] [2022-07-21 16:55:23,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:23,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482192004] [2022-07-21 16:55:24,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482192004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:24,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297144010] [2022-07-21 16:55:24,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:24,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:24,154 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 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) [2022-07-21 16:55:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,204 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-07-21 16:55:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:24,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 16:55:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,214 INFO L225 Difference]: With dead ends: 92 [2022-07-21 16:55:24,214 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 16:55:24,217 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 [2022-07-21 16:55:24,223 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 44 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 142 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 [2022-07-21 16:55:24,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 142 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 16:55:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2022-07-21 16:55:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.78125) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-21 16:55:24,255 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 7 [2022-07-21 16:55:24,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,255 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-21 16:55:24,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-21 16:55:24,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:55:24,256 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 16:55:24,257 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:24,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-21 16:55:24,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751100] [2022-07-21 16:55:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751100] [2022-07-21 16:55:24,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751100] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:55:24,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516104343] [2022-07-21 16:55:24,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:55:24,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:55:24,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:24,345 INFO L87 Difference]: Start difference. First operand 51 states and 57 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) [2022-07-21 16:55:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,383 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2022-07-21 16:55:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:55:24,383 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 [2022-07-21 16:55:24,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,384 INFO L225 Difference]: With dead ends: 49 [2022-07-21 16:55:24,384 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 16:55:24,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:24,385 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 16:55:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-21 16:55:24,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.71875) internal successors, (55), 48 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) [2022-07-21 16:55:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-07-21 16:55:24,389 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 7 [2022-07-21 16:55:24,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,389 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-07-21 16:55:24,389 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) [2022-07-21 16:55:24,390 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-07-21 16:55:24,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-21 16:55:24,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 16:55:24,390 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:24,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-21 16:55:24,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374639715] [2022-07-21 16:55:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374639715] [2022-07-21 16:55:24,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374639715] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:24,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113420650] [2022-07-21 16:55:24,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:24,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:24,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:24,467 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,558 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-07-21 16:55:24,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:24,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-21 16:55:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,560 INFO L225 Difference]: With dead ends: 89 [2022-07-21 16:55:24,560 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 16:55:24,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:55:24,561 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 159 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 57 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:24,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 16:55:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 51. [2022-07-21 16:55:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-21 16:55:24,565 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 7 [2022-07-21 16:55:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,566 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-21 16:55:24,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,566 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-21 16:55:24,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:55:24,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 16:55:24,567 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:24,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-21 16:55:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859862370] [2022-07-21 16:55:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859862370] [2022-07-21 16:55:24,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859862370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:24,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562867873] [2022-07-21 16:55:24,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:24,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:24,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:24,628 INFO L87 Difference]: Start difference. First operand 51 states and 58 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) [2022-07-21 16:55:24,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,667 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-21 16:55:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:24,668 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 [2022-07-21 16:55:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,668 INFO L225 Difference]: With dead ends: 50 [2022-07-21 16:55:24,668 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 16:55:24,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:24,669 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 16:55:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-21 16:55:24,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2022-07-21 16:55:24,673 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 9 [2022-07-21 16:55:24,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,673 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2022-07-21 16:55:24,673 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) [2022-07-21 16:55:24,674 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2022-07-21 16:55:24,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:55:24,674 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 16:55:24,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:24,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,675 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-21 16:55:24,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416109465] [2022-07-21 16:55:24,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416109465] [2022-07-21 16:55:24,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416109465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:24,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534783772] [2022-07-21 16:55:24,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:24,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:24,706 INFO L87 Difference]: Start difference. First operand 50 states and 57 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) [2022-07-21 16:55:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,719 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-07-21 16:55:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:24,719 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 [2022-07-21 16:55:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,720 INFO L225 Difference]: With dead ends: 90 [2022-07-21 16:55:24,720 INFO L226 Difference]: Without dead ends: 90 [2022-07-21 16:55:24,720 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 [2022-07-21 16:55:24,721 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 66 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 94 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-21 16:55:24,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2022-07-21 16:55:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 60 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) [2022-07-21 16:55:24,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-21 16:55:24,725 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 9 [2022-07-21 16:55:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,725 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-21 16:55:24,726 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) [2022-07-21 16:55:24,726 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-21 16:55:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:55:24,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 16:55:24,727 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:24,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-21 16:55:24,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995948925] [2022-07-21 16:55:24,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995948925] [2022-07-21 16:55:24,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995948925] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 16:55:24,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050486196] [2022-07-21 16:55:24,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 16:55:24,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 16:55:24,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:24,750 INFO L87 Difference]: Start difference. First operand 61 states and 71 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) [2022-07-21 16:55:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,775 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-07-21 16:55:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 16:55:24,776 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 [2022-07-21 16:55:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,777 INFO L225 Difference]: With dead ends: 59 [2022-07-21 16:55:24,777 INFO L226 Difference]: Without dead ends: 59 [2022-07-21 16:55:24,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 16:55:24,780 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-21 16:55:24,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-21 16:55:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-21 16:55:24,794 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 9 [2022-07-21 16:55:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,794 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-21 16:55:24,794 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) [2022-07-21 16:55:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-21 16:55:24,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-21 16:55:24,795 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 16:55:24,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:24,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,796 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-21 16:55:24,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346940936] [2022-07-21 16:55:24,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346940936] [2022-07-21 16:55:24,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346940936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719075477] [2022-07-21 16:55:24,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:24,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:24,868 INFO L87 Difference]: Start difference. First operand 59 states and 69 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) [2022-07-21 16:55:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:24,923 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2022-07-21 16:55:24,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:24,924 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 [2022-07-21 16:55:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:24,924 INFO L225 Difference]: With dead ends: 90 [2022-07-21 16:55:24,925 INFO L226 Difference]: Without dead ends: 90 [2022-07-21 16:55:24,925 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 [2022-07-21 16:55:24,925 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 106 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:24,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 73 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-21 16:55:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2022-07-21 16:55:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 60 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:24,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-07-21 16:55:24,929 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 9 [2022-07-21 16:55:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:24,929 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-07-21 16:55:24,929 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) [2022-07-21 16:55:24,929 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-07-21 16:55:24,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-21 16:55:24,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:24,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:24,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 16:55:24,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:24,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:24,931 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-21 16:55:24,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:24,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419919533] [2022-07-21 16:55:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:24,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:24,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:24,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419919533] [2022-07-21 16:55:24,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419919533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:24,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:24,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:24,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208605418] [2022-07-21 16:55:24,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:24,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:24,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:24,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:24,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:24,981 INFO L87 Difference]: Start difference. First operand 61 states and 72 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) [2022-07-21 16:55:25,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:25,008 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-07-21 16:55:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:25,009 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 [2022-07-21 16:55:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:25,009 INFO L225 Difference]: With dead ends: 60 [2022-07-21 16:55:25,009 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 16:55:25,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:25,010 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:25,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:25,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 16:55:25,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-21 16:55:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 59 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) [2022-07-21 16:55:25,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-21 16:55:25,013 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 10 [2022-07-21 16:55:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:25,014 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-21 16:55:25,014 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) [2022-07-21 16:55:25,014 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-21 16:55:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-21 16:55:25,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:25,015 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:25,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 16:55:25,015 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:25,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:25,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-21 16:55:25,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:25,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45146442] [2022-07-21 16:55:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:25,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:25,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:25,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45146442] [2022-07-21 16:55:25,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45146442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:25,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911422574] [2022-07-21 16:55:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:25,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:25,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:25,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:25,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 16:55:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:25,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-21 16:55:25,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:25,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:25,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:25,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:25,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:25,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:25,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911422574] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:25,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:25,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-21 16:55:25,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604086739] [2022-07-21 16:55:25,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:25,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:55:25,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:25,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:55:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:55:25,446 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:25,608 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2022-07-21 16:55:25,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 16:55:25,608 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-21 16:55:25,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:25,609 INFO L225 Difference]: With dead ends: 137 [2022-07-21 16:55:25,609 INFO L226 Difference]: Without dead ends: 137 [2022-07-21 16:55:25,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:55:25,610 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 139 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:25,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 232 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:25,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-21 16:55:25,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 55. [2022-07-21 16:55:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-21 16:55:25,613 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 11 [2022-07-21 16:55:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:25,613 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-21 16:55:25,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-21 16:55:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 16:55:25,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:25,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:25,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:25,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:25,833 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:25,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2022-07-21 16:55:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:25,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026249515] [2022-07-21 16:55:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026249515] [2022-07-21 16:55:25,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026249515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:25,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:25,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:55:25,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963828169] [2022-07-21 16:55:25,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:25,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:55:25,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:55:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:55:25,879 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:25,932 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2022-07-21 16:55:25,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:25,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 16:55:25,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:25,933 INFO L225 Difference]: With dead ends: 72 [2022-07-21 16:55:25,933 INFO L226 Difference]: Without dead ends: 72 [2022-07-21 16:55:25,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:55:25,934 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 172 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:25,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 58 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:25,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-21 16:55:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2022-07-21 16:55:25,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 59 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) [2022-07-21 16:55:25,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-07-21 16:55:25,936 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 12 [2022-07-21 16:55:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:25,937 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-07-21 16:55:25,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,937 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-07-21 16:55:25,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-21 16:55:25,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:25,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:25,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 16:55:25,938 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-21 16:55:25,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:25,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121632229] [2022-07-21 16:55:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:25,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:25,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:25,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121632229] [2022-07-21 16:55:25,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121632229] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:25,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:25,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 16:55:25,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68596526] [2022-07-21 16:55:25,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:25,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 16:55:25,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 16:55:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 16:55:25,961 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:25,984 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-07-21 16:55:25,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:25,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-21 16:55:25,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:25,985 INFO L225 Difference]: With dead ends: 58 [2022-07-21 16:55:25,985 INFO L226 Difference]: Without dead ends: 58 [2022-07-21 16:55:25,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:25,986 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:25,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-21 16:55:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-21 16:55:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.4375) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-07-21 16:55:25,988 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 12 [2022-07-21 16:55:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:25,988 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-07-21 16:55:25,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-07-21 16:55:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 16:55:25,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:25,989 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:25,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 16:55:25,989 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:25,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-21 16:55:25,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:25,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141977039] [2022-07-21 16:55:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:25,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:26,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:26,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141977039] [2022-07-21 16:55:26,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141977039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:26,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405419915] [2022-07-21 16:55:26,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:26,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:26,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:26,061 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:26,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 16:55:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:26,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 16:55:26,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:26,120 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:26,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:26,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:26,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:26,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405419915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:26,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:26,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-21 16:55:26,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642344633] [2022-07-21 16:55:26,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:26,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:55:26,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:26,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:55:26,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:26,309 INFO L87 Difference]: Start difference. First operand 58 states and 69 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) [2022-07-21 16:55:26,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:26,463 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2022-07-21 16:55:26,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:55:26,463 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 [2022-07-21 16:55:26,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:26,464 INFO L225 Difference]: With dead ends: 118 [2022-07-21 16:55:26,464 INFO L226 Difference]: Without dead ends: 118 [2022-07-21 16:55:26,464 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 [2022-07-21 16:55:26,464 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 172 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:26,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 199 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-21 16:55:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 55. [2022-07-21 16:55:26,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 54 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) [2022-07-21 16:55:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2022-07-21 16:55:26,466 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 13 [2022-07-21 16:55:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:26,467 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2022-07-21 16:55:26,467 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) [2022-07-21 16:55:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2022-07-21 16:55:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:55:26,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:26,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:26,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:26,675 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,SelfDestructingSolverStorable11 [2022-07-21 16:55:26,675 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:26,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:26,676 INFO L85 PathProgramCache]: Analyzing trace with hash 172810975, now seen corresponding path program 1 times [2022-07-21 16:55:26,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:26,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426340994] [2022-07-21 16:55:26,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:26,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:26,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:26,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426340994] [2022-07-21 16:55:26,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426340994] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:26,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:26,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:26,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432191343] [2022-07-21 16:55:26,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:26,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:26,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:26,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:26,714 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:26,743 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-21 16:55:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-07-21 16:55:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:26,743 INFO L225 Difference]: With dead ends: 54 [2022-07-21 16:55:26,744 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 16:55:26,744 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 [2022-07-21 16:55:26,745 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:26,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 63 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 16:55:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-21 16:55:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:26,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-21 16:55:26,747 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2022-07-21 16:55:26,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:26,748 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-21 16:55:26,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-21 16:55:26,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 16:55:26,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:26,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:26,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 16:55:26,753 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:26,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:26,753 INFO L85 PathProgramCache]: Analyzing trace with hash 172810976, now seen corresponding path program 1 times [2022-07-21 16:55:26,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:26,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801003306] [2022-07-21 16:55:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:26,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:26,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:26,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801003306] [2022-07-21 16:55:26,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801003306] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:26,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:26,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 16:55:26,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445559767] [2022-07-21 16:55:26,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:26,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 16:55:26,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:26,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 16:55:26,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 16:55:26,823 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:26,877 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-07-21 16:55:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:55:26,878 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2022-07-21 16:55:26,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:26,878 INFO L225 Difference]: With dead ends: 54 [2022-07-21 16:55:26,878 INFO L226 Difference]: Without dead ends: 54 [2022-07-21 16:55:26,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:55:26,879 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:26,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 74 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-21 16:55:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-21 16:55:26,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-21 16:55:26,881 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 14 [2022-07-21 16:55:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:26,881 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-21 16:55:26,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-21 16:55:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:55:26,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:26,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:26,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 16:55:26,885 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:26,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:26,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1432376192, now seen corresponding path program 1 times [2022-07-21 16:55:26,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:26,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761155224] [2022-07-21 16:55:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:26,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:26,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:26,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761155224] [2022-07-21 16:55:26,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761155224] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:26,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:26,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:26,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651651947] [2022-07-21 16:55:26,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:26,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:26,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:26,930 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2022-07-21 16:55:26,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:26,973 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-21 16:55:26,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:26,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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 [2022-07-21 16:55:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:26,973 INFO L225 Difference]: With dead ends: 53 [2022-07-21 16:55:26,973 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 16:55:26,974 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 [2022-07-21 16:55:26,974 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:26,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 61 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:26,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 16:55:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-21 16:55:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:26,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-21 16:55:26,976 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2022-07-21 16:55:26,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:26,976 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-21 16:55:26,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2022-07-21 16:55:26,976 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-21 16:55:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 16:55:26,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:26,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:26,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 16:55:26,977 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:26,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1432376191, now seen corresponding path program 1 times [2022-07-21 16:55:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:26,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283115565] [2022-07-21 16:55:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:26,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:27,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:27,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283115565] [2022-07-21 16:55:27,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283115565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:27,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:27,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 16:55:27,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105642995] [2022-07-21 16:55:27,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:27,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 16:55:27,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:27,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 16:55:27,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:55:27,030 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2022-07-21 16:55:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:27,095 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-07-21 16:55:27,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:55:27,095 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2022-07-21 16:55:27,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:27,096 INFO L225 Difference]: With dead ends: 62 [2022-07-21 16:55:27,096 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 16:55:27,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-07-21 16:55:27,096 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 100 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:27,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:27,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 16:55:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2022-07-21 16:55:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-21 16:55:27,098 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 16 [2022-07-21 16:55:27,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:27,098 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-21 16:55:27,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2022-07-21 16:55:27,099 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-21 16:55:27,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:55:27,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:27,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:27,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-21 16:55:27,100 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:27,100 INFO L85 PathProgramCache]: Analyzing trace with hash -2124032946, now seen corresponding path program 1 times [2022-07-21 16:55:27,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:27,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833542308] [2022-07-21 16:55:27,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:27,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:27,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:27,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833542308] [2022-07-21 16:55:27,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833542308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:27,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:27,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663829095] [2022-07-21 16:55:27,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:27,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:27,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:27,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:27,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:27,125 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:27,156 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-21 16:55:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 16:55:27,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:55:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:27,157 INFO L225 Difference]: With dead ends: 53 [2022-07-21 16:55:27,157 INFO L226 Difference]: Without dead ends: 53 [2022-07-21 16:55:27,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 16:55:27,158 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:27,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-21 16:55:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-21 16:55:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.297872340425532) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-21 16:55:27,159 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 18 [2022-07-21 16:55:27,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:27,160 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-21 16:55:27,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-21 16:55:27,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:55:27,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:27,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:27,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 16:55:27,161 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:27,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2124032945, now seen corresponding path program 1 times [2022-07-21 16:55:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:27,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969934807] [2022-07-21 16:55:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:27,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:27,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:27,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969934807] [2022-07-21 16:55:27,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969934807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:27,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:27,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 16:55:27,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344240985] [2022-07-21 16:55:27,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:27,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:55:27,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:55:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:55:27,233 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:27,326 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-07-21 16:55:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 16:55:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:55:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:27,327 INFO L225 Difference]: With dead ends: 62 [2022-07-21 16:55:27,328 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 16:55:27,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:27,328 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 103 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:27,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 91 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 16:55:27,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-07-21 16:55:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 54 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-21 16:55:27,330 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 18 [2022-07-21 16:55:27,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:27,331 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-21 16:55:27,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-21 16:55:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:55:27,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:27,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:27,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-21 16:55:27,332 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:27,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:27,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2123984178, now seen corresponding path program 1 times [2022-07-21 16:55:27,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:27,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350948935] [2022-07-21 16:55:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:27,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:27,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:27,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350948935] [2022-07-21 16:55:27,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350948935] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:27,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:27,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 16:55:27,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131217378] [2022-07-21 16:55:27,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:27,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 16:55:27,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 16:55:27,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 16:55:27,424 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:27,504 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-07-21 16:55:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 16:55:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:55:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:27,505 INFO L225 Difference]: With dead ends: 81 [2022-07-21 16:55:27,505 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 16:55:27,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-21 16:55:27,506 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:27,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 169 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 16:55:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2022-07-21 16:55:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2022-07-21 16:55:27,508 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 18 [2022-07-21 16:55:27,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:27,508 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2022-07-21 16:55:27,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,508 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2022-07-21 16:55:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 16:55:27,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:27,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:27,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-21 16:55:27,509 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:27,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:27,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1149914764, now seen corresponding path program 1 times [2022-07-21 16:55:27,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:27,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185356464] [2022-07-21 16:55:27,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:27,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:27,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:27,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185356464] [2022-07-21 16:55:27,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185356464] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:27,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:27,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-21 16:55:27,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663482649] [2022-07-21 16:55:27,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:27,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-21 16:55:27,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:27,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-21 16:55:27,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-21 16:55:27,603 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:27,729 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2022-07-21 16:55:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:55:27,730 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-21 16:55:27,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:27,731 INFO L225 Difference]: With dead ends: 105 [2022-07-21 16:55:27,731 INFO L226 Difference]: Without dead ends: 105 [2022-07-21 16:55:27,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:27,732 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 101 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:27,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 177 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:27,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-21 16:55:27,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2022-07-21 16:55:27,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 72 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) [2022-07-21 16:55:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2022-07-21 16:55:27,737 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 18 [2022-07-21 16:55:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:27,737 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2022-07-21 16:55:27,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2022-07-21 16:55:27,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-21 16:55:27,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:27,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:27,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-21 16:55:27,739 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:27,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1419000974, now seen corresponding path program 1 times [2022-07-21 16:55:27,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:27,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320223315] [2022-07-21 16:55:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:27,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:27,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:27,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320223315] [2022-07-21 16:55:27,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320223315] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:27,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:27,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 16:55:27,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058681332] [2022-07-21 16:55:27,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:27,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:27,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:27,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:27,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:27,818 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:27,832 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-07-21 16:55:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 16:55:27,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-21 16:55:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:27,833 INFO L225 Difference]: With dead ends: 72 [2022-07-21 16:55:27,833 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 16:55:27,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 16:55:27,834 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:27,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 58 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:27,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 16:55:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-07-21 16:55:27,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.225) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-07-21 16:55:27,836 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 19 [2022-07-21 16:55:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:27,836 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-07-21 16:55:27,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-07-21 16:55:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 16:55:27,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:27,836 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, 1] [2022-07-21 16:55:27,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-21 16:55:27,837 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:27,838 INFO L85 PathProgramCache]: Analyzing trace with hash 453336425, now seen corresponding path program 1 times [2022-07-21 16:55:27,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:27,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688428942] [2022-07-21 16:55:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:27,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:27,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:27,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688428942] [2022-07-21 16:55:27,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688428942] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:27,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025434228] [2022-07-21 16:55:27,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:27,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:27,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:27,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:27,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 16:55:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:28,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-21 16:55:28,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:28,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:28,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:28,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:28,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:28,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025434228] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:28,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:28,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2022-07-21 16:55:28,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070676802] [2022-07-21 16:55:28,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:28,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 16:55:28,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 16:55:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-07-21 16:55:28,245 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:28,470 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-07-21 16:55:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 16:55:28,471 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 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 22 [2022-07-21 16:55:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:28,471 INFO L225 Difference]: With dead ends: 60 [2022-07-21 16:55:28,471 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 16:55:28,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-07-21 16:55:28,477 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 165 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:28,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 123 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 16:55:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2022-07-21 16:55:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 45 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) [2022-07-21 16:55:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-21 16:55:28,479 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 22 [2022-07-21 16:55:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:28,480 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-21 16:55:28,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:28,480 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-21 16:55:28,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 16:55:28,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:28,481 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:28,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:28,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:28,696 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:28,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:28,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1864607690, now seen corresponding path program 1 times [2022-07-21 16:55:28,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:28,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730076992] [2022-07-21 16:55:28,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:28,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:28,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:28,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730076992] [2022-07-21 16:55:28,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730076992] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:28,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:28,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-21 16:55:28,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260603590] [2022-07-21 16:55:28,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:28,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 16:55:28,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 16:55:28,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-07-21 16:55:28,832 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-07-21 16:55:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:29,016 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-07-21 16:55:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:55:29,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 24 [2022-07-21 16:55:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:29,017 INFO L225 Difference]: With dead ends: 55 [2022-07-21 16:55:29,017 INFO L226 Difference]: Without dead ends: 38 [2022-07-21 16:55:29,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:55:29,018 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:29,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 178 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-21 16:55:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-21 16:55:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-07-21 16:55:29,019 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 24 [2022-07-21 16:55:29,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:29,020 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-07-21 16:55:29,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-07-21 16:55:29,020 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-07-21 16:55:29,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 16:55:29,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:29,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:29,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-21 16:55:29,021 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:29,021 INFO L85 PathProgramCache]: Analyzing trace with hash -2007657780, now seen corresponding path program 1 times [2022-07-21 16:55:29,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:29,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748491683] [2022-07-21 16:55:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:29,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:29,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:29,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748491683] [2022-07-21 16:55:29,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748491683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:29,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 16:55:29,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-21 16:55:29,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428492531] [2022-07-21 16:55:29,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 16:55:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:29,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 16:55:29,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-21 16:55:29,198 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2022-07-21 16:55:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:29,361 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-07-21 16:55:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 16:55:29,362 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 24 [2022-07-21 16:55:29,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:29,362 INFO L225 Difference]: With dead ends: 51 [2022-07-21 16:55:29,362 INFO L226 Difference]: Without dead ends: 42 [2022-07-21 16:55:29,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:55:29,363 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:29,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 153 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-21 16:55:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-07-21 16:55:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:29,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-07-21 16:55:29,365 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 24 [2022-07-21 16:55:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:29,365 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-07-21 16:55:29,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2022-07-21 16:55:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-07-21 16:55:29,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 16:55:29,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:29,365 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-07-21 16:55:29,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-21 16:55:29,366 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:29,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2045741993, now seen corresponding path program 1 times [2022-07-21 16:55:29,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:29,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820443717] [2022-07-21 16:55:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:29,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:29,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:29,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820443717] [2022-07-21 16:55:29,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820443717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:29,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440720227] [2022-07-21 16:55:29,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:29,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:29,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:29,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:29,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 16:55:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:29,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 16:55:29,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:29,612 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:29,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:29,682 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 [2022-07-21 16:55:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:29,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440720227] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:29,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:29,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-07-21 16:55:29,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699521284] [2022-07-21 16:55:29,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:29,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 16:55:29,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:29,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 16:55:29,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-07-21 16:55:29,694 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:29,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:29,954 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-07-21 16:55:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:55:29,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 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) Word has length 28 [2022-07-21 16:55:29,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:29,954 INFO L225 Difference]: With dead ends: 45 [2022-07-21 16:55:29,954 INFO L226 Difference]: Without dead ends: 45 [2022-07-21 16:55:29,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:55:29,955 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 132 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:29,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 176 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-21 16:55:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-07-21 16:55:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-07-21 16:55:29,956 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2022-07-21 16:55:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:29,956 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-07-21 16:55:29,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-07-21 16:55:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-21 16:55:29,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:29,957 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:30,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:30,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:30,157 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:30,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1136965878, now seen corresponding path program 1 times [2022-07-21 16:55:30,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:30,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884515607] [2022-07-21 16:55:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:30,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 16:55:30,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:30,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884515607] [2022-07-21 16:55:30,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884515607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:30,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685458846] [2022-07-21 16:55:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:30,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:30,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:30,194 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:30,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 16:55:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:30,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-21 16:55:30,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:30,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:30,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:30,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:30,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:30,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685458846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:30,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:30,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2022-07-21 16:55:30,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371033487] [2022-07-21 16:55:30,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:30,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 16:55:30,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:30,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 16:55:30,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-21 16:55:30,578 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:30,842 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-07-21 16:55:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 16:55:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-21 16:55:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:30,842 INFO L225 Difference]: With dead ends: 47 [2022-07-21 16:55:30,842 INFO L226 Difference]: Without dead ends: 47 [2022-07-21 16:55:30,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:55:30,843 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 102 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:30,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 119 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-21 16:55:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2022-07-21 16:55:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-07-21 16:55:30,844 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2022-07-21 16:55:30,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:30,844 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-07-21 16:55:30,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-07-21 16:55:30,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 16:55:30,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:30,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-07-21 16:55:30,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:31,045 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,SelfDestructingSolverStorable25 [2022-07-21 16:55:31,045 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:31,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:31,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1702563688, now seen corresponding path program 1 times [2022-07-21 16:55:31,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:31,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213421965] [2022-07-21 16:55:31,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:31,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:31,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:31,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:31,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213421965] [2022-07-21 16:55:31,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213421965] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:31,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364734111] [2022-07-21 16:55:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:31,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:31,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:31,180 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:31,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 16:55:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:31,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-21 16:55:31,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:31,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:31,481 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 [2022-07-21 16:55:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:31,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364734111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:31,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:31,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-07-21 16:55:31,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981165283] [2022-07-21 16:55:31,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:31,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 16:55:31,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:31,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 16:55:31,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-07-21 16:55:31,494 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 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) [2022-07-21 16:55:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:31,779 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-07-21 16:55:31,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:55:31,780 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 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) Word has length 32 [2022-07-21 16:55:31,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:31,780 INFO L225 Difference]: With dead ends: 52 [2022-07-21 16:55:31,780 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 16:55:31,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2022-07-21 16:55:31,781 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 160 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:31,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 176 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 16:55:31,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2022-07-21 16:55:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:31,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-07-21 16:55:31,783 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2022-07-21 16:55:31,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:31,783 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-07-21 16:55:31,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 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) [2022-07-21 16:55:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-07-21 16:55:31,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-21 16:55:31,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:31,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:31,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:32,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-21 16:55:32,002 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:32,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:32,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1702514921, now seen corresponding path program 1 times [2022-07-21 16:55:32,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:32,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318405386] [2022-07-21 16:55:32,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:32,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:32,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:32,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318405386] [2022-07-21 16:55:32,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318405386] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:32,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282072705] [2022-07-21 16:55:32,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:32,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:32,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:32,204 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:32,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 16:55:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:32,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-21 16:55:32,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:32,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:32,384 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 [2022-07-21 16:55:32,428 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 [2022-07-21 16:55:32,589 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 [2022-07-21 16:55:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:32,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:32,722 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_337 (Array Int Int)) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23| Int)) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_337) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23| 1)) 0) (not (<= 0 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23|)))) is different from false [2022-07-21 16:55:32,737 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:32,738 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 [2022-07-21 16:55:32,742 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:32,743 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 [2022-07-21 16:55:32,759 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 [2022-07-21 16:55:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:33,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282072705] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:33,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:33,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2022-07-21 16:55:33,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866749920] [2022-07-21 16:55:33,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:33,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-21 16:55:33,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-21 16:55:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=717, Unknown=1, NotChecked=54, Total=870 [2022-07-21 16:55:33,015 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 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) [2022-07-21 16:55:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:33,364 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2022-07-21 16:55:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 16:55:33,365 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 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) Word has length 32 [2022-07-21 16:55:33,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:33,365 INFO L225 Difference]: With dead ends: 69 [2022-07-21 16:55:33,365 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 16:55:33,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=198, Invalid=1287, Unknown=1, NotChecked=74, Total=1560 [2022-07-21 16:55:33,366 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:33,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 324 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 222 Invalid, 0 Unknown, 123 Unchecked, 0.1s Time] [2022-07-21 16:55:33,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 16:55:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-07-21 16:55:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-07-21 16:55:33,368 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2022-07-21 16:55:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:33,368 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-07-21 16:55:33,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 30 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) [2022-07-21 16:55:33,368 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-07-21 16:55:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 16:55:33,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:33,369 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-21 16:55:33,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:33,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:33,576 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash 956999220, now seen corresponding path program 2 times [2022-07-21 16:55:33,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:33,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135027808] [2022-07-21 16:55:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:33,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:33,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:33,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135027808] [2022-07-21 16:55:33,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135027808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:33,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921813505] [2022-07-21 16:55:33,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:55:33,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:33,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:33,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:33,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-21 16:55:33,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:55:33,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-21 16:55:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:33,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:33,956 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 [2022-07-21 16:55:33,991 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:33,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921813505] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:33,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:33,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-21 16:55:33,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021774277] [2022-07-21 16:55:33,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:33,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-21 16:55:33,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:33,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-21 16:55:33,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-07-21 16:55:33,993 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) [2022-07-21 16:55:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:34,167 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2022-07-21 16:55:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 16:55:34,168 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) Word has length 36 [2022-07-21 16:55:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:34,168 INFO L225 Difference]: With dead ends: 56 [2022-07-21 16:55:34,168 INFO L226 Difference]: Without dead ends: 56 [2022-07-21 16:55:34,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2022-07-21 16:55:34,169 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:34,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 138 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-21 16:55:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2022-07-21 16:55:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 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) [2022-07-21 16:55:34,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-07-21 16:55:34,170 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 36 [2022-07-21 16:55:34,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:34,170 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-07-21 16:55:34,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) [2022-07-21 16:55:34,171 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-07-21 16:55:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 16:55:34,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:34,171 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:34,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-21 16:55:34,371 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,SelfDestructingSolverStorable28 [2022-07-21 16:55:34,371 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:34,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:34,372 INFO L85 PathProgramCache]: Analyzing trace with hash 553249237, now seen corresponding path program 2 times [2022-07-21 16:55:34,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:34,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894547605] [2022-07-21 16:55:34,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:34,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:55:34,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:34,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894547605] [2022-07-21 16:55:34,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894547605] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:34,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736078270] [2022-07-21 16:55:34,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:55:34,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:34,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:34,697 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:34,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-21 16:55:34,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:55:34,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-21 16:55:34,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:34,913 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 [2022-07-21 16:55:35,067 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-21 16:55:35,067 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 26 treesize of output 10 [2022-07-21 16:55:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:55:35,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:35,251 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:35,251 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 103 treesize of output 103 [2022-07-21 16:55:35,288 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 40 treesize of output 36 [2022-07-21 16:55:35,292 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 [2022-07-21 16:55:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:55:35,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736078270] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:35,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:35,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 15] total 40 [2022-07-21 16:55:35,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056405666] [2022-07-21 16:55:35,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:35,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-21 16:55:35,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:35,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-21 16:55:35,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2022-07-21 16:55:35,391 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:35,884 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2022-07-21 16:55:35,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:55:35,884 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 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 38 [2022-07-21 16:55:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:35,885 INFO L225 Difference]: With dead ends: 70 [2022-07-21 16:55:35,885 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 16:55:35,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=331, Invalid=2639, Unknown=0, NotChecked=0, Total=2970 [2022-07-21 16:55:35,887 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 114 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:35,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 292 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 330 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-07-21 16:55:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 16:55:35,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-07-21 16:55:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 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) [2022-07-21 16:55:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-07-21 16:55:35,888 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 38 [2022-07-21 16:55:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:35,889 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-07-21 16:55:35,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.075) internal successors, (83), 40 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:35,889 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-07-21 16:55:35,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 16:55:35,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:35,889 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:35,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:36,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:36,107 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:36,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:36,107 INFO L85 PathProgramCache]: Analyzing trace with hash 2039282674, now seen corresponding path program 3 times [2022-07-21 16:55:36,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:36,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219663007] [2022-07-21 16:55:36,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:36,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:55:36,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:36,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219663007] [2022-07-21 16:55:36,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219663007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:36,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315848030] [2022-07-21 16:55:36,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:55:36,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:36,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:36,256 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:36,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-21 16:55:36,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-21 16:55:36,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-21 16:55:36,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:55:36,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:36,585 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 7 treesize of output 5 [2022-07-21 16:55:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:55:36,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315848030] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:36,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:36,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-07-21 16:55:36,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218274459] [2022-07-21 16:55:36,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:36,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-21 16:55:36,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-21 16:55:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-07-21 16:55:36,608 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:36,834 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-07-21 16:55:36,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 16:55:36,834 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-21 16:55:36,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:36,835 INFO L225 Difference]: With dead ends: 55 [2022-07-21 16:55:36,835 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 16:55:36,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:55:36,835 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 203 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:36,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 140 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:36,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 16:55:36,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-07-21 16:55:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-07-21 16:55:36,837 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 42 [2022-07-21 16:55:36,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:36,837 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-07-21 16:55:36,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.423076923076923) internal successors, (89), 27 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-07-21 16:55:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 16:55:36,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:36,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-07-21 16:55:36,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:37,037 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,SelfDestructingSolverStorable30 [2022-07-21 16:55:37,038 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:37,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:37,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1309731743, now seen corresponding path program 2 times [2022-07-21 16:55:37,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:37,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596738076] [2022-07-21 16:55:37,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:37,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:55:37,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:37,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596738076] [2022-07-21 16:55:37,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596738076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:37,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660727058] [2022-07-21 16:55:37,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:55:37,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:37,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:37,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:37,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-21 16:55:37,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-21 16:55:37,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:37,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 16:55:37,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 16:55:37,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 16:55:37,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660727058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 16:55:37,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 16:55:37,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 15 [2022-07-21 16:55:37,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287892594] [2022-07-21 16:55:37,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 16:55:37,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 16:55:37,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:37,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 16:55:37,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-07-21 16:55:37,333 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:37,372 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-07-21 16:55:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 16:55:37,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 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 46 [2022-07-21 16:55:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:37,372 INFO L225 Difference]: With dead ends: 53 [2022-07-21 16:55:37,373 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 16:55:37,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-21 16:55:37,374 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:37,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 74 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 16:55:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 16:55:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-21 16:55:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 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) [2022-07-21 16:55:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-07-21 16:55:37,377 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2022-07-21 16:55:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:37,377 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-07-21 16:55:37,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-07-21 16:55:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 16:55:37,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:37,378 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:37,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:37,594 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,SelfDestructingSolverStorable31 [2022-07-21 16:55:37,595 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1309682976, now seen corresponding path program 3 times [2022-07-21 16:55:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:37,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321908030] [2022-07-21 16:55:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:37,787 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:55:37,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:37,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321908030] [2022-07-21 16:55:37,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321908030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:37,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479431646] [2022-07-21 16:55:37,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:55:37,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:37,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:37,789 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:37,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-21 16:55:37,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-21 16:55:37,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-21 16:55:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:37,978 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 [2022-07-21 16:55:38,326 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-07-21 16:55:38,327 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 29 treesize of output 13 [2022-07-21 16:55:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:55:38,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:38,582 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:38,583 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 103 treesize of output 103 [2022-07-21 16:55:38,613 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 40 treesize of output 36 [2022-07-21 16:55:38,635 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:38,636 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 60 treesize of output 56 [2022-07-21 16:55:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 16:55:38,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479431646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:38,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:38,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 18] total 43 [2022-07-21 16:55:38,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736791836] [2022-07-21 16:55:38,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:38,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-21 16:55:38,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:38,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-21 16:55:38,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1670, Unknown=0, NotChecked=0, Total=1806 [2022-07-21 16:55:38,774 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:39,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:39,461 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2022-07-21 16:55:39,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-21 16:55:39,461 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-21 16:55:39,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:39,462 INFO L225 Difference]: With dead ends: 141 [2022-07-21 16:55:39,462 INFO L226 Difference]: Without dead ends: 64 [2022-07-21 16:55:39,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=372, Invalid=4050, Unknown=0, NotChecked=0, Total=4422 [2022-07-21 16:55:39,463 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 98 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:39,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 349 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 406 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2022-07-21 16:55:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-21 16:55:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-07-21 16:55:39,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 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) [2022-07-21 16:55:39,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-07-21 16:55:39,465 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 46 [2022-07-21 16:55:39,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:39,465 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-07-21 16:55:39,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.627906976744186) internal successors, (113), 43 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:39,465 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-07-21 16:55:39,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-21 16:55:39,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:39,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:39,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:39,668 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,SelfDestructingSolverStorable32 [2022-07-21 16:55:39,669 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1724661286, now seen corresponding path program 4 times [2022-07-21 16:55:39,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:39,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776827425] [2022-07-21 16:55:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:39,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:55:39,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:39,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776827425] [2022-07-21 16:55:39,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776827425] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:39,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039509697] [2022-07-21 16:55:39,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:55:39,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:39,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:39,821 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:39,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-21 16:55:39,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:55:39,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:39,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-21 16:55:39,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:39,916 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:39,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:39,922 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:40,064 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 16 treesize of output 12 [2022-07-21 16:55:40,083 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 19 treesize of output 21 [2022-07-21 16:55:40,350 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:40,350 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 22 treesize of output 22 [2022-07-21 16:55:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 16:55:40,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:40,733 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:40,734 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 [2022-07-21 16:55:40,739 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:40,739 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 [2022-07-21 16:55:40,743 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 [2022-07-21 16:55:41,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:41,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:41,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-21 16:55:41,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039509697] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:41,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:41,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 34 [2022-07-21 16:55:41,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937166438] [2022-07-21 16:55:41,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:41,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 16:55:41,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 16:55:41,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1041, Unknown=9, NotChecked=0, Total=1190 [2022-07-21 16:55:41,079 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 35 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:41,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:41,482 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-07-21 16:55:41,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-21 16:55:41,482 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-21 16:55:41,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:41,482 INFO L225 Difference]: With dead ends: 60 [2022-07-21 16:55:41,482 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 16:55:41,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=309, Invalid=2034, Unknown=9, NotChecked=0, Total=2352 [2022-07-21 16:55:41,483 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:41,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 260 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-07-21 16:55:41,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 16:55:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-07-21 16:55:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 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) [2022-07-21 16:55:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-07-21 16:55:41,484 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 54 [2022-07-21 16:55:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:41,484 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-07-21 16:55:41,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.4411764705882355) internal successors, (117), 35 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-07-21 16:55:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-21 16:55:41,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:41,485 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:41,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:41,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-21 16:55:41,685 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:41,686 INFO L85 PathProgramCache]: Analyzing trace with hash 457880571, now seen corresponding path program 4 times [2022-07-21 16:55:41,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:41,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042088379] [2022-07-21 16:55:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:41,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:55:41,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:41,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042088379] [2022-07-21 16:55:41,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042088379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:41,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893009026] [2022-07-21 16:55:41,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:55:41,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:41,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:41,832 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:41,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-21 16:55:41,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:55:41,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:41,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-21 16:55:41,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:41,922 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:41,923 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 [2022-07-21 16:55:42,117 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 [2022-07-21 16:55:42,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:42,499 INFO L356 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2022-07-21 16:55:42,499 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 32 treesize of output 20 [2022-07-21 16:55:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:55:42,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:43,206 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:43,206 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 103 treesize of output 103 [2022-07-21 16:55:43,234 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 40 treesize of output 36 [2022-07-21 16:55:43,248 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 [2022-07-21 16:55:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:55:43,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893009026] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:43,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:43,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 20] total 51 [2022-07-21 16:55:43,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164471194] [2022-07-21 16:55:43,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:43,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 16:55:43,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:43,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 16:55:43,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=2370, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 16:55:43,738 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 52 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 52 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:44,970 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-07-21 16:55:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 16:55:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 52 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-21 16:55:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:44,971 INFO L225 Difference]: With dead ends: 69 [2022-07-21 16:55:44,971 INFO L226 Difference]: Without dead ends: 69 [2022-07-21 16:55:44,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=966, Invalid=4436, Unknown=0, NotChecked=0, Total=5402 [2022-07-21 16:55:44,973 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 302 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:44,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 359 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 749 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-07-21 16:55:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-21 16:55:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-07-21 16:55:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 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) [2022-07-21 16:55:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-21 16:55:44,975 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 56 [2022-07-21 16:55:44,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:44,976 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-21 16:55:44,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.6666666666666665) internal successors, (136), 52 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-21 16:55:44,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-21 16:55:44,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:44,976 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:44,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:45,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:45,184 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:45,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:45,184 INFO L85 PathProgramCache]: Analyzing trace with hash 187500121, now seen corresponding path program 5 times [2022-07-21 16:55:45,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:45,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837416027] [2022-07-21 16:55:45,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:45,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:45,332 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:55:45,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:45,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837416027] [2022-07-21 16:55:45,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837416027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:45,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032704139] [2022-07-21 16:55:45,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:55:45,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:45,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:45,335 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:45,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-21 16:55:45,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-21 16:55:45,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:45,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-21 16:55:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:45,458 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:45,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:45,759 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:55:45,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 16:55:45,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032704139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:45,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:45,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-07-21 16:55:45,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648191863] [2022-07-21 16:55:45,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:45,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-21 16:55:45,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-21 16:55:45,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2022-07-21 16:55:45,959 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:46,321 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-07-21 16:55:46,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-21 16:55:46,321 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-21 16:55:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:46,322 INFO L225 Difference]: With dead ends: 106 [2022-07-21 16:55:46,322 INFO L226 Difference]: Without dead ends: 76 [2022-07-21 16:55:46,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2022-07-21 16:55:46,322 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 135 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:46,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 204 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 16:55:46,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-21 16:55:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2022-07-21 16:55:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:46,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-07-21 16:55:46,324 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 68 [2022-07-21 16:55:46,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:46,324 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-07-21 16:55:46,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.0) internal successors, (136), 34 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:46,325 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-07-21 16:55:46,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-21 16:55:46,325 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:46,325 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:46,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-21 16:55:46,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:46,541 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:46,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash 278636470, now seen corresponding path program 6 times [2022-07-21 16:55:46,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:46,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010418862] [2022-07-21 16:55:46,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:46,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 54 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:55:46,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:46,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010418862] [2022-07-21 16:55:46,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010418862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:46,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4809190] [2022-07-21 16:55:46,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:55:46,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:46,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:46,664 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:46,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-21 16:55:46,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-21 16:55:46,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:46,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-21 16:55:46,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:46,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:46,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:46,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:55:47,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-21 16:55:47,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4809190] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:47,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:47,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-07-21 16:55:47,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955487584] [2022-07-21 16:55:47,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:47,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-21 16:55:47,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:47,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-21 16:55:47,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2022-07-21 16:55:47,238 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 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) [2022-07-21 16:55:47,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:47,608 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2022-07-21 16:55:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 16:55:47,608 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 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 72 [2022-07-21 16:55:47,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:47,608 INFO L225 Difference]: With dead ends: 179 [2022-07-21 16:55:47,609 INFO L226 Difference]: Without dead ends: 81 [2022-07-21 16:55:47,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=539, Invalid=1813, Unknown=0, NotChecked=0, Total=2352 [2022-07-21 16:55:47,610 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:47,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 255 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:47,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-21 16:55:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-21 16:55:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:47,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-07-21 16:55:47,611 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 72 [2022-07-21 16:55:47,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:47,611 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-07-21 16:55:47,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.65625) internal successors, (149), 32 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) [2022-07-21 16:55:47,612 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-07-21 16:55:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-21 16:55:47,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:47,614 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:47,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:47,832 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,SelfDestructingSolverStorable36 [2022-07-21 16:55:47,832 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:47,832 INFO L85 PathProgramCache]: Analyzing trace with hash -618201744, now seen corresponding path program 7 times [2022-07-21 16:55:47,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:47,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664436240] [2022-07-21 16:55:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:47,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:48,419 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:48,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664436240] [2022-07-21 16:55:48,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664436240] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:48,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979191147] [2022-07-21 16:55:48,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:55:48,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:48,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:48,434 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:48,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-21 16:55:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:48,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 126 conjunts are in the unsatisfiable core [2022-07-21 16:55:48,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:48,820 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 [2022-07-21 16:55:49,012 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 [2022-07-21 16:55:49,013 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 16:55:49,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:49,390 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:49,390 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 103 treesize of output 103 [2022-07-21 16:55:49,451 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 40 treesize of output 36 [2022-07-21 16:55:49,463 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:49,464 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 60 treesize of output 56 [2022-07-21 16:55:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:55:49,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979191147] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:49,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:49,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 24] total 58 [2022-07-21 16:55:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761527797] [2022-07-21 16:55:49,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:49,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-21 16:55:49,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-21 16:55:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3125, Unknown=0, NotChecked=0, Total=3306 [2022-07-21 16:55:49,605 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 58 states, 58 states have (on average 2.8620689655172415) internal successors, (166), 58 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:50,851 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2022-07-21 16:55:50,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-21 16:55:50,851 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.8620689655172415) internal successors, (166), 58 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-21 16:55:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:50,852 INFO L225 Difference]: With dead ends: 124 [2022-07-21 16:55:50,852 INFO L226 Difference]: Without dead ends: 91 [2022-07-21 16:55:50,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=537, Invalid=5943, Unknown=0, NotChecked=0, Total=6480 [2022-07-21 16:55:50,853 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 300 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:50,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 678 Invalid, 1804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1610 Invalid, 0 Unknown, 118 Unchecked, 0.5s Time] [2022-07-21 16:55:50,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-21 16:55:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2022-07-21 16:55:50,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-07-21 16:55:50,855 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 80 [2022-07-21 16:55:50,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:50,855 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-07-21 16:55:50,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.8620689655172415) internal successors, (166), 58 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-07-21 16:55:50,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-21 16:55:50,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:50,856 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:50,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:51,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-21 16:55:51,059 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash -704234675, now seen corresponding path program 8 times [2022-07-21 16:55:51,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:51,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965244314] [2022-07-21 16:55:51,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:51,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:55:51,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:51,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965244314] [2022-07-21 16:55:51,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965244314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:51,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44251740] [2022-07-21 16:55:51,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:55:51,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:51,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:51,270 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:51,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-21 16:55:51,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:55:51,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:51,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-21 16:55:51,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:55:51,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:51,850 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 [2022-07-21 16:55:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:55:51,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44251740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:51,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:51,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-07-21 16:55:51,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640340733] [2022-07-21 16:55:51,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:51,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-21 16:55:51,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:51,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-21 16:55:51,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2022-07-21 16:55:51,892 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 35 states, 34 states have (on average 4.029411764705882) internal successors, (137), 35 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:52,394 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2022-07-21 16:55:52,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 16:55:52,394 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.029411764705882) internal successors, (137), 35 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-07-21 16:55:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:52,395 INFO L225 Difference]: With dead ends: 92 [2022-07-21 16:55:52,395 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 16:55:52,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=2226, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 16:55:52,397 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 376 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:52,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 319 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:52,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 16:55:52,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-07-21 16:55:52,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-07-21 16:55:52,403 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 84 [2022-07-21 16:55:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:52,405 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-07-21 16:55:52,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.029411764705882) internal successors, (137), 35 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-07-21 16:55:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-21 16:55:52,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:52,413 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:52,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:52,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-21 16:55:52,631 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:52,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:52,632 INFO L85 PathProgramCache]: Analyzing trace with hash -915690852, now seen corresponding path program 9 times [2022-07-21 16:55:52,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:52,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239146481] [2022-07-21 16:55:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:52,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 82 proven. 71 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:55:52,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:52,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239146481] [2022-07-21 16:55:52,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239146481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:52,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589143038] [2022-07-21 16:55:52,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:55:52,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:52,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:52,777 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:52,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-21 16:55:52,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-21 16:55:52,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:52,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-21 16:55:52,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:52,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-21 16:55:52,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-21 16:55:52,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:55:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 103 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:55:53,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 87 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 16:55:53,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589143038] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:53,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:53,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 37 [2022-07-21 16:55:53,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430635313] [2022-07-21 16:55:53,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:53,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-21 16:55:53,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:53,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-21 16:55:53,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1069, Unknown=0, NotChecked=0, Total=1332 [2022-07-21 16:55:53,535 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 37 states, 37 states have (on average 4.162162162162162) internal successors, (154), 37 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:53,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:55:53,862 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2022-07-21 16:55:53,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-21 16:55:53,863 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.162162162162162) internal successors, (154), 37 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-21 16:55:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:55:53,863 INFO L225 Difference]: With dead ends: 160 [2022-07-21 16:55:53,863 INFO L226 Difference]: Without dead ends: 98 [2022-07-21 16:55:53,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=637, Invalid=2015, Unknown=0, NotChecked=0, Total=2652 [2022-07-21 16:55:53,864 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 60 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 16:55:53,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 243 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 16:55:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-21 16:55:53,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2022-07-21 16:55:53,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 94 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-07-21 16:55:53,865 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2022-07-21 16:55:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:55:53,866 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-07-21 16:55:53,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.162162162162162) internal successors, (154), 37 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:55:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-07-21 16:55:53,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-21 16:55:53,866 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:55:53,866 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:55:53,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-21 16:55:54,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-21 16:55:54,075 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:55:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:55:54,076 INFO L85 PathProgramCache]: Analyzing trace with hash -938077319, now seen corresponding path program 10 times [2022-07-21 16:55:54,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:55:54,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679006968] [2022-07-21 16:55:54,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:55:54,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:55:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:55:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:55:54,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:55:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679006968] [2022-07-21 16:55:54,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679006968] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:55:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557533876] [2022-07-21 16:55:54,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-21 16:55:54,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:55:54,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:55:54,716 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:55:54,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-21 16:55:54,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-21 16:55:54,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:55:54,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-21 16:55:54,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:55:54,896 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:55:54,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:55:55,327 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 [2022-07-21 16:55:55,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-21 16:55:55,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-21 16:55:55,968 INFO L356 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2022-07-21 16:55:55,969 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 28 treesize of output 13 [2022-07-21 16:55:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 84 proven. 69 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 16:55:55,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:55:58,883 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:55:58,883 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 99 treesize of output 99 [2022-07-21 16:55:58,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-07-21 16:55:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 16:55:59,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557533876] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:55:59,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:55:59,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 23, 28] total 76 [2022-07-21 16:55:59,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120862450] [2022-07-21 16:55:59,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:55:59,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-21 16:55:59,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:55:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-21 16:55:59,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=5345, Unknown=1, NotChecked=0, Total=5700 [2022-07-21 16:55:59,574 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 76 states, 76 states have (on average 2.960526315789474) internal successors, (225), 76 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:01,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:01,246 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2022-07-21 16:56:01,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-21 16:56:01,247 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.960526315789474) internal successors, (225), 76 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2022-07-21 16:56:01,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:01,247 INFO L225 Difference]: With dead ends: 144 [2022-07-21 16:56:01,247 INFO L226 Difference]: Without dead ends: 105 [2022-07-21 16:56:01,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3220 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=935, Invalid=12174, Unknown=1, NotChecked=0, Total=13110 [2022-07-21 16:56:01,251 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 114 mSDsluCounter, 986 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 678 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:01,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1010 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1350 Invalid, 0 Unknown, 678 Unchecked, 0.4s Time] [2022-07-21 16:56:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-21 16:56:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2022-07-21 16:56:01,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-07-21 16:56:01,254 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 94 [2022-07-21 16:56:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:01,254 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-07-21 16:56:01,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.960526315789474) internal successors, (225), 76 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-07-21 16:56:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-21 16:56:01,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:01,255 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:01,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:01,472 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,SelfDestructingSolverStorable40 [2022-07-21 16:56:01,472 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:56:01,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:01,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1626450582, now seen corresponding path program 11 times [2022-07-21 16:56:01,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:01,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829916852] [2022-07-21 16:56:01,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:01,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 16:56:01,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:01,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829916852] [2022-07-21 16:56:01,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829916852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:01,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889818892] [2022-07-21 16:56:01,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-21 16:56:01,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:01,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:01,703 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:01,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-21 16:56:01,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-21 16:56:01,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:01,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-21 16:56:01,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:01,935 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:01,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 16:56:02,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 16:56:03,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889818892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:03,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:03,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2022-07-21 16:56:03,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381429183] [2022-07-21 16:56:03,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:03,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-21 16:56:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:03,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-21 16:56:03,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2455, Unknown=0, NotChecked=0, Total=2756 [2022-07-21 16:56:03,082 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 53 states, 52 states have (on average 4.346153846153846) internal successors, (226), 53 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:03,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:03,868 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2022-07-21 16:56:03,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-21 16:56:03,869 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.346153846153846) internal successors, (226), 53 states have internal predecessors, (226), 0 states have call successors, (0), 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 98 [2022-07-21 16:56:03,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:03,869 INFO L225 Difference]: With dead ends: 106 [2022-07-21 16:56:03,869 INFO L226 Difference]: Without dead ends: 106 [2022-07-21 16:56:03,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=989, Invalid=4413, Unknown=0, NotChecked=0, Total=5402 [2022-07-21 16:56:03,870 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 424 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 901 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:03,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 450 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 901 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:56:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-21 16:56:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-07-21 16:56:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-07-21 16:56:03,872 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 98 [2022-07-21 16:56:03,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:03,872 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-07-21 16:56:03,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.346153846153846) internal successors, (226), 53 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-07-21 16:56:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-21 16:56:03,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:03,873 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:03,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-21 16:56:04,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:04,081 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:56:04,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:04,081 INFO L85 PathProgramCache]: Analyzing trace with hash 560906021, now seen corresponding path program 12 times [2022-07-21 16:56:04,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:04,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943312510] [2022-07-21 16:56:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:04,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:04,268 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 116 proven. 97 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 16:56:04,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:04,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943312510] [2022-07-21 16:56:04,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943312510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:04,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120599551] [2022-07-21 16:56:04,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-21 16:56:04,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:04,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:04,269 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:04,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-21 16:56:04,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-21 16:56:04,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:04,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-21 16:56:04,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:04,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-21 16:56:04,875 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 [2022-07-21 16:56:04,905 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 [2022-07-21 16:56:05,338 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-21 16:56:05,338 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 [2022-07-21 16:56:05,363 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 16:56:05,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:05,650 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1070 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1070) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-07-21 16:56:05,654 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:05,654 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-21 16:56:05,658 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:05,658 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 [2022-07-21 16:56:05,660 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 [2022-07-21 16:56:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-21 16:56:05,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120599551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:05,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:05,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 52 [2022-07-21 16:56:05,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219810409] [2022-07-21 16:56:05,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:05,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-21 16:56:05,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-21 16:56:05,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2381, Unknown=1, NotChecked=98, Total=2652 [2022-07-21 16:56:05,941 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 52 states, 52 states have (on average 4.0576923076923075) internal successors, (211), 52 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) [2022-07-21 16:56:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:07,085 INFO L93 Difference]: Finished difference Result 183 states and 186 transitions. [2022-07-21 16:56:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-21 16:56:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.0576923076923075) internal successors, (211), 52 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 104 [2022-07-21 16:56:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:07,086 INFO L225 Difference]: With dead ends: 183 [2022-07-21 16:56:07,086 INFO L226 Difference]: Without dead ends: 112 [2022-07-21 16:56:07,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 172 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 9 DeprecatedPredicates, 1626 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=444, Invalid=6200, Unknown=2, NotChecked=160, Total=6806 [2022-07-21 16:56:07,087 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 96 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:07,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 765 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1032 Invalid, 0 Unknown, 328 Unchecked, 0.3s Time] [2022-07-21 16:56:07,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-21 16:56:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-07-21 16:56:07,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-07-21 16:56:07,089 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 104 [2022-07-21 16:56:07,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:07,089 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-07-21 16:56:07,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.0576923076923075) internal successors, (211), 52 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) [2022-07-21 16:56:07,090 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-07-21 16:56:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-21 16:56:07,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:07,093 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:07,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:07,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:07,312 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:56:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash -466755262, now seen corresponding path program 13 times [2022-07-21 16:56:07,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:07,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606055043] [2022-07-21 16:56:07,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:07,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:07,990 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 16:56:07,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:07,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606055043] [2022-07-21 16:56:07,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606055043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:07,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625184696] [2022-07-21 16:56:07,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-21 16:56:07,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:07,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:07,992 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:07,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-21 16:56:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:08,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 150 conjunts are in the unsatisfiable core [2022-07-21 16:56:08,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:08,462 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 [2022-07-21 16:56:08,703 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 [2022-07-21 16:56:08,705 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 16:56:08,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:11,265 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:11,265 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 103 treesize of output 103 [2022-07-21 16:56:11,298 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 40 treesize of output 36 [2022-07-21 16:56:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 16:56:11,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625184696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:11,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:11,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 25, 30] total 74 [2022-07-21 16:56:11,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540316164] [2022-07-21 16:56:11,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-21 16:56:11,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-21 16:56:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=5142, Unknown=1, NotChecked=0, Total=5402 [2022-07-21 16:56:11,662 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:14,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:14,189 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2022-07-21 16:56:14,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-21 16:56:14,190 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-21 16:56:14,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:14,190 INFO L225 Difference]: With dead ends: 164 [2022-07-21 16:56:14,190 INFO L226 Difference]: Without dead ends: 119 [2022-07-21 16:56:14,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=572, Invalid=9129, Unknown=1, NotChecked=0, Total=9702 [2022-07-21 16:56:14,191 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 217 mSDsluCounter, 1212 mSDsCounter, 0 mSdLazyCounter, 3083 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 3469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:14,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 1244 Invalid, 3469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3083 Invalid, 0 Unknown, 346 Unchecked, 1.1s Time] [2022-07-21 16:56:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-21 16:56:14,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2022-07-21 16:56:14,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 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) [2022-07-21 16:56:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-07-21 16:56:14,193 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 108 [2022-07-21 16:56:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:14,193 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-07-21 16:56:14,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.0405405405405403) internal successors, (225), 74 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-07-21 16:56:14,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-21 16:56:14,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:14,193 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:14,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:14,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:14,394 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:56:14,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:14,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1814519393, now seen corresponding path program 14 times [2022-07-21 16:56:14,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:14,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100830373] [2022-07-21 16:56:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:14,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:14,701 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 45 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 16:56:14,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100830373] [2022-07-21 16:56:14,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100830373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:14,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696409335] [2022-07-21 16:56:14,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-21 16:56:14,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:14,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:14,713 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:14,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-21 16:56:14,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-21 16:56:14,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:14,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-21 16:56:14,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:14,860 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:14,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 66 proven. 172 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 16:56:15,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 91 proven. 147 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 16:56:16,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696409335] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:16,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:16,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 59 [2022-07-21 16:56:16,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106820956] [2022-07-21 16:56:16,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:16,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-21 16:56:16,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-21 16:56:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=3114, Unknown=0, NotChecked=0, Total=3540 [2022-07-21 16:56:16,295 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 60 states, 59 states have (on average 4.338983050847458) internal successors, (256), 60 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:16,997 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2022-07-21 16:56:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-21 16:56:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.338983050847458) internal successors, (256), 60 states have internal predecessors, (256), 0 states have call successors, (0), 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 112 [2022-07-21 16:56:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:16,998 INFO L225 Difference]: With dead ends: 120 [2022-07-21 16:56:16,998 INFO L226 Difference]: Without dead ends: 120 [2022-07-21 16:56:16,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1090, Invalid=4916, Unknown=0, NotChecked=0, Total=6006 [2022-07-21 16:56:16,999 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 411 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:16,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 430 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 16:56:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-21 16:56:17,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-07-21 16:56:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 118 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) [2022-07-21 16:56:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2022-07-21 16:56:17,000 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 112 [2022-07-21 16:56:17,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:17,001 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2022-07-21 16:56:17,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.338983050847458) internal successors, (256), 60 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:17,001 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2022-07-21 16:56:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-21 16:56:17,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 16:56:17,001 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 16:56:17,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:17,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:17,202 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-21 16:56:17,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 16:56:17,202 INFO L85 PathProgramCache]: Analyzing trace with hash 253266798, now seen corresponding path program 15 times [2022-07-21 16:56:17,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 16:56:17,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730802457] [2022-07-21 16:56:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 16:56:17,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 16:56:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 16:56:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 156 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-21 16:56:17,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 16:56:17,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730802457] [2022-07-21 16:56:17,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730802457] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 16:56:17,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918240687] [2022-07-21 16:56:17,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-21 16:56:17,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 16:56:17,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 16:56:17,407 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 16:56:17,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-21 16:56:17,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-21 16:56:17,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-21 16:56:17,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-21 16:56:17,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 16:56:17,907 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-21 16:56:17,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-21 16:56:18,046 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-21 16:56:18,236 INFO L356 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2022-07-21 16:56:18,236 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 32 treesize of output 36 [2022-07-21 16:56:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 28 proven. 31 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-07-21 16:56:18,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 16:56:23,027 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-21 16:56:23,027 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 103 treesize of output 103 [2022-07-21 16:56:23,040 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 40 treesize of output 36 [2022-07-21 16:56:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-21 16:56:23,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918240687] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 16:56:23,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 16:56:23,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 12] total 42 [2022-07-21 16:56:23,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545846665] [2022-07-21 16:56:23,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 16:56:23,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-21 16:56:23,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 16:56:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-21 16:56:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1547, Unknown=2, NotChecked=0, Total=1722 [2022-07-21 16:56:23,401 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:25,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 16:56:25,997 INFO L93 Difference]: Finished difference Result 207 states and 210 transitions. [2022-07-21 16:56:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-21 16:56:25,997 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-07-21 16:56:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 16:56:25,997 INFO L225 Difference]: With dead ends: 207 [2022-07-21 16:56:25,997 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 16:56:25,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2995 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1863, Invalid=10567, Unknown=2, NotChecked=0, Total=12432 [2022-07-21 16:56:25,999 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 101 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 16:56:25,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 180 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 808 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2022-07-21 16:56:25,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 16:56:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 16:56:25,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:25,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 16:56:25,999 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 118 [2022-07-21 16:56:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 16:56:25,999 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 16:56:25,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 16:56:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 16:56:25,999 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 16:56:26,002 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 19 remaining) [2022-07-21 16:56:26,002 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2022-07-21 16:56:26,003 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2022-07-21 16:56:26,003 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2022-07-21 16:56:26,003 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2022-07-21 16:56:26,003 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 19 remaining) [2022-07-21 16:56:26,003 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2022-07-21 16:56:26,003 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2022-07-21 16:56:26,003 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2022-07-21 16:56:26,003 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2022-07-21 16:56:26,004 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 19 remaining) [2022-07-21 16:56:26,004 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2022-07-21 16:56:26,004 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 19 remaining) [2022-07-21 16:56:26,004 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 19 remaining) [2022-07-21 16:56:26,004 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2022-07-21 16:56:26,004 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2022-07-21 16:56:26,004 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2022-07-21 16:56:26,004 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2022-07-21 16:56:26,005 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2022-07-21 16:56:26,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-21 16:56:26,214 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,SelfDestructingSolverStorable45 [2022-07-21 16:56:26,216 INFO L356 BasicCegarLoop]: Path program histogram: [15, 4, 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] [2022-07-21 16:56:26,218 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 16:56:26,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:56:26 BoogieIcfgContainer [2022-07-21 16:56:26,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 16:56:26,222 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 16:56:26,222 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 16:56:26,222 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 16:56:26,223 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:55:23" (3/4) ... [2022-07-21 16:56:26,225 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 16:56:26,234 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-07-21 16:56:26,234 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-21 16:56:26,234 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-21 16:56:26,235 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 16:56:26,261 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 16:56:26,261 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 16:56:26,261 INFO L158 Benchmark]: Toolchain (without parser) took 63043.19ms. Allocated memory was 60.8MB in the beginning and 234.9MB in the end (delta: 174.1MB). Free memory was 40.2MB in the beginning and 100.8MB in the end (delta: -60.6MB). Peak memory consumption was 113.4MB. Max. memory is 16.1GB. [2022-07-21 16:56:26,261 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 60.8MB. Free memory was 42.7MB in the beginning and 42.6MB in the end (delta: 48.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 16:56:26,262 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.66ms. Allocated memory is still 60.8MB. Free memory was 39.9MB in the beginning and 38.9MB in the end (delta: 1.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 16:56:26,262 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.54ms. Allocated memory is still 60.8MB. Free memory was 38.9MB in the beginning and 36.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 16:56:26,262 INFO L158 Benchmark]: Boogie Preprocessor took 19.18ms. Allocated memory is still 60.8MB. Free memory was 36.9MB in the beginning and 35.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 16:56:26,262 INFO L158 Benchmark]: RCFGBuilder took 308.06ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 35.5MB in the beginning and 53.9MB in the end (delta: -18.4MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. [2022-07-21 16:56:26,262 INFO L158 Benchmark]: TraceAbstraction took 62351.82ms. Allocated memory was 75.5MB in the beginning and 234.9MB in the end (delta: 159.4MB). Free memory was 53.3MB in the beginning and 103.6MB in the end (delta: -50.4MB). Peak memory consumption was 108.0MB. Max. memory is 16.1GB. [2022-07-21 16:56:26,262 INFO L158 Benchmark]: Witness Printer took 38.91ms. Allocated memory is still 234.9MB. Free memory was 103.6MB in the beginning and 100.8MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 16:56:26,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 60.8MB. Free memory was 42.7MB in the beginning and 42.6MB in the end (delta: 48.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 290.66ms. Allocated memory is still 60.8MB. Free memory was 39.9MB in the beginning and 38.9MB in the end (delta: 1.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.54ms. Allocated memory is still 60.8MB. Free memory was 38.9MB in the beginning and 36.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.18ms. Allocated memory is still 60.8MB. Free memory was 36.9MB in the beginning and 35.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 308.06ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 35.5MB in the beginning and 53.9MB in the end (delta: -18.4MB). Peak memory consumption was 12.3MB. Max. memory is 16.1GB. * TraceAbstraction took 62351.82ms. Allocated memory was 75.5MB in the beginning and 234.9MB in the end (delta: 159.4MB). Free memory was 53.3MB in the beginning and 103.6MB in the end (delta: -50.4MB). Peak memory consumption was 108.0MB. Max. memory is 16.1GB. * Witness Printer took 38.91ms. Allocated memory is still 234.9MB. Free memory was 103.6MB in the beginning and 100.8MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 50 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 62.3s, OverallIterations: 46, TraceHistogramMax: 9, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 18.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5769 SdHoareTripleChecker+Valid, 6.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5769 mSDsluCounter, 10507 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2105 IncrementalHoareTripleChecker+Unchecked, 9319 mSDsCounter, 953 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16260 IncrementalHoareTripleChecker+Invalid, 19318 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 953 mSolverCounterUnsat, 1188 mSDtfsCounter, 16260 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3946 GetRequests, 2490 SyntacticMatches, 35 SemanticMatches, 1421 ConstructedPredicates, 2 IntricatePredicates, 9 DeprecatedPredicates, 20112 ImplicationChecksByTransitivity, 34.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=45, InterpolantAutomatonStates: 691, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 46 MinimizatonAttempts, 437 StatesRemovedByMinimization, 31 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 33.7s InterpolantComputationTime, 3318 NumberOfCodeBlocks, 3264 NumberOfCodeBlocksAsserted, 117 NumberOfCheckSat, 4691 ConstructedInterpolants, 249 QuantifiedInterpolants, 52217 SizeOfPredicates, 527 NumberOfNonLiveVariables, 7770 ConjunctsInSsa, 1489 ConjunctsInUnsatCore, 95 InterpolantComputations, 22 PerfectInterpolantSequences, 4102/8198 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-21 16:56:26,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE