./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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_cstrcspn-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:04:23,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:04:23,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:04:23,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:04:23,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:04:23,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:04:23,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:04:23,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:04:23,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:04:23,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:04:23,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:04:23,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:04:23,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:04:23,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:04:23,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:04:23,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:04:23,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:04:23,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:04:23,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:04:23,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:04:23,473 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:04:23,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:04:23,474 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:04:23,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:04:23,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:04:23,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:04:23,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:04:23,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:04:23,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:04:23,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:04:23,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:04:23,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:04:23,480 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:04:23,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:04:23,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:04:23,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:04:23,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:04:23,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:04:23,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:04:23,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:04:23,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:04:23,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:04:23,490 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:04:23,510 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:04:23,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:04:23,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:04:23,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:04:23,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:04:23,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:04:23,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:04:23,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:04:23,516 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:04:23,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:04:23,516 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:04:23,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:04:23,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:04:23,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:04:23,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:04:23,517 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:04:23,517 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:04:23,517 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:04:23,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:04:23,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:04:23,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:04:23,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:04:23,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:04:23,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:04:23,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:04:23,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:04:23,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:04:23,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:04:23,519 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:04:23,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:04:23,520 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86c4ccee9690ccdd33683565314ba095e56520aa142914bd8063fc7c4c92940d [2022-07-14 06:04:23,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:04:23,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:04:23,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:04:23,818 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:04:23,818 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:04:23,819 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2022-07-14 06:04:23,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c4e0ab7c/f544aa66ed5b4236ada064b9d6b3a404/FLAGf5f477416 [2022-07-14 06:04:24,394 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:04:24,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcspn-alloca-2.i [2022-07-14 06:04:24,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c4e0ab7c/f544aa66ed5b4236ada064b9d6b3a404/FLAGf5f477416 [2022-07-14 06:04:24,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c4e0ab7c/f544aa66ed5b4236ada064b9d6b3a404 [2022-07-14 06:04:24,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:04:24,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:04:24,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:04:24,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:04:24,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:04:24,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:04:24" (1/1) ... [2022-07-14 06:04:24,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec02189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:24, skipping insertion in model container [2022-07-14 06:04:24,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:04:24" (1/1) ... [2022-07-14 06:04:24,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:04:24,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:04:25,252 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:04:25,258 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:04:25,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:04:25,323 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:04:25,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25 WrapperNode [2022-07-14 06:04:25,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:04:25,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:04:25,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:04:25,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:04:25,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (1/1) ... [2022-07-14 06:04:25,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (1/1) ... [2022-07-14 06:04:25,413 INFO L137 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 88 [2022-07-14 06:04:25,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:04:25,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:04:25,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:04:25,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:04:25,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (1/1) ... [2022-07-14 06:04:25,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (1/1) ... [2022-07-14 06:04:25,431 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (1/1) ... [2022-07-14 06:04:25,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (1/1) ... [2022-07-14 06:04:25,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (1/1) ... [2022-07-14 06:04:25,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (1/1) ... [2022-07-14 06:04:25,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (1/1) ... [2022-07-14 06:04:25,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:04:25,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:04:25,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:04:25,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:04:25,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (1/1) ... [2022-07-14 06:04:25,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:04:25,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:25,516 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) [2022-07-14 06:04:25,524 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 [2022-07-14 06:04:25,561 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:04:25,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:04:25,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:04:25,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:04:25,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:04:25,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:04:25,641 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:04:25,642 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:04:25,828 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:04:25,832 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:04:25,832 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-14 06:04:25,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:04:25 BoogieIcfgContainer [2022-07-14 06:04:25,834 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:04:25,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:04:25,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:04:25,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:04:25,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:04:24" (1/3) ... [2022-07-14 06:04:25,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a35b5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:04:25, skipping insertion in model container [2022-07-14 06:04:25,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:04:25" (2/3) ... [2022-07-14 06:04:25,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a35b5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:04:25, skipping insertion in model container [2022-07-14 06:04:25,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:04:25" (3/3) ... [2022-07-14 06:04:25,840 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcspn-alloca-2.i [2022-07-14 06:04:25,853 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:04:25,854 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-07-14 06:04:25,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:04:25,894 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@72290d8d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@572ce22d [2022-07-14 06:04:25,894 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-07-14 06:04:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 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) [2022-07-14 06:04:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:04:25,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:25,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:25,915 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:25,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-14 06:04:25,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:25,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934183691] [2022-07-14 06:04:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:25,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:26,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:26,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:26,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934183691] [2022-07-14 06:04:26,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934183691] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:26,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:26,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:04:26,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321741002] [2022-07-14 06:04:26,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:26,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:04:26,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:26,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:04:26,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:04:26,220 INFO L87 Difference]: Start difference. First operand has 42 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 41 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) 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) [2022-07-14 06:04:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:26,277 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-07-14 06:04:26,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:04:26,280 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 [2022-07-14 06:04:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:26,285 INFO L225 Difference]: With dead ends: 76 [2022-07-14 06:04:26,299 INFO L226 Difference]: Without dead ends: 72 [2022-07-14 06:04:26,302 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 [2022-07-14 06:04:26,306 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 70 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:26,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 84 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-14 06:04:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 43. [2022-07-14 06:04:26,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 42 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) [2022-07-14 06:04:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-07-14 06:04:26,355 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2022-07-14 06:04:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:26,356 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-07-14 06:04:26,356 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) [2022-07-14 06:04:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-07-14 06:04:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:04:26,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:26,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:04:26,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:26,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:26,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-14 06:04:26,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:26,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572825611] [2022-07-14 06:04:26,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:26,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:26,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:26,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572825611] [2022-07-14 06:04:26,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572825611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:26,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:26,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:04:26,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783772879] [2022-07-14 06:04:26,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:26,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:04:26,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:26,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:04:26,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:04:26,464 INFO L87 Difference]: Start difference. First operand 43 states and 49 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) [2022-07-14 06:04:26,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:26,510 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-07-14 06:04:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:04:26,511 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 [2022-07-14 06:04:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:26,511 INFO L225 Difference]: With dead ends: 41 [2022-07-14 06:04:26,511 INFO L226 Difference]: Without dead ends: 41 [2022-07-14 06:04:26,512 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 [2022-07-14 06:04:26,513 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:26,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 33 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-14 06:04:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-07-14 06:04:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 40 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) [2022-07-14 06:04:26,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-14 06:04:26,540 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2022-07-14 06:04:26,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:26,540 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-14 06:04:26,540 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) [2022-07-14 06:04:26,540 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-14 06:04:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:04:26,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:26,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:26,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:04:26,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:26,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:26,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-14 06:04:26,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:26,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634876819] [2022-07-14 06:04:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:26,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:26,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:26,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634876819] [2022-07-14 06:04:26,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634876819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:26,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:26,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:04:26,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250372730] [2022-07-14 06:04:26,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:26,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:04:26,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:04:26,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:04:26,655 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:26,797 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-07-14 06:04:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:04:26,798 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:04:26,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:26,800 INFO L225 Difference]: With dead ends: 73 [2022-07-14 06:04:26,800 INFO L226 Difference]: Without dead ends: 73 [2022-07-14 06:04:26,800 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 [2022-07-14 06:04:26,806 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:26,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-14 06:04:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2022-07-14 06:04:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.5625) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-14 06:04:26,817 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 7 [2022-07-14 06:04:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:26,817 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-14 06:04:26,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:26,817 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-14 06:04:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:04:26,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:26,818 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:26,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:04:26,819 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:26,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:26,824 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-14 06:04:26,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:26,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055469597] [2022-07-14 06:04:26,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:26,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:26,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:26,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:26,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055469597] [2022-07-14 06:04:26,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055469597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:26,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:26,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:04:26,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943220451] [2022-07-14 06:04:26,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:26,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:04:26,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:26,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:04:26,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:04:26,956 INFO L87 Difference]: Start difference. First operand 43 states and 50 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) [2022-07-14 06:04:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:27,059 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2022-07-14 06:04:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:04:27,059 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 [2022-07-14 06:04:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:27,062 INFO L225 Difference]: With dead ends: 70 [2022-07-14 06:04:27,062 INFO L226 Difference]: Without dead ends: 70 [2022-07-14 06:04:27,063 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 [2022-07-14 06:04:27,066 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 91 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:27,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 117 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:27,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-14 06:04:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2022-07-14 06:04:27,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 48 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) [2022-07-14 06:04:27,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-07-14 06:04:27,075 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 9 [2022-07-14 06:04:27,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:27,075 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-07-14 06:04:27,075 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) [2022-07-14 06:04:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-07-14 06:04:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:04:27,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:27,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:27,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:04:27,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:27,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:27,078 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-14 06:04:27,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:27,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219238977] [2022-07-14 06:04:27,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:27,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:27,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:27,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:27,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219238977] [2022-07-14 06:04:27,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219238977] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:27,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:27,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:04:27,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553894899] [2022-07-14 06:04:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:27,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:04:27,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:04:27,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:04:27,122 INFO L87 Difference]: Start difference. First operand 49 states and 59 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) [2022-07-14 06:04:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:27,140 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-07-14 06:04:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:04:27,140 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 [2022-07-14 06:04:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:27,141 INFO L225 Difference]: With dead ends: 85 [2022-07-14 06:04:27,141 INFO L226 Difference]: Without dead ends: 85 [2022-07-14 06:04:27,141 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 [2022-07-14 06:04:27,142 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:27,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-14 06:04:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2022-07-14 06:04:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 61 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) [2022-07-14 06:04:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-07-14 06:04:27,145 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 9 [2022-07-14 06:04:27,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:27,145 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-07-14 06:04:27,146 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) [2022-07-14 06:04:27,146 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-07-14 06:04:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:04:27,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:27,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:27,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:04:27,147 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-14 06:04:27,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:27,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844428656] [2022-07-14 06:04:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:27,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:27,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:27,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844428656] [2022-07-14 06:04:27,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844428656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:27,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:27,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:04:27,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292718338] [2022-07-14 06:04:27,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:27,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:04:27,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:04:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:04:27,172 INFO L87 Difference]: Start difference. First operand 62 states and 75 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) [2022-07-14 06:04:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:27,186 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-07-14 06:04:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:04:27,187 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 [2022-07-14 06:04:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:27,187 INFO L225 Difference]: With dead ends: 60 [2022-07-14 06:04:27,188 INFO L226 Difference]: Without dead ends: 60 [2022-07-14 06:04:27,188 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 [2022-07-14 06:04:27,188 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:27,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 33 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-14 06:04:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-14 06:04:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.411764705882353) internal successors, (72), 59 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) [2022-07-14 06:04:27,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-14 06:04:27,192 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 9 [2022-07-14 06:04:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:27,192 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-14 06:04:27,192 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) [2022-07-14 06:04:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-14 06:04:27,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:04:27,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:27,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:27,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 06:04:27,193 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:27,193 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-14 06:04:27,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:27,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134402409] [2022-07-14 06:04:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:27,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:27,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:27,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:27,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134402409] [2022-07-14 06:04:27,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134402409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:27,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:27,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:04:27,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404428179] [2022-07-14 06:04:27,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:27,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:04:27,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:27,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:04:27,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:04:27,239 INFO L87 Difference]: Start difference. First operand 60 states and 72 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) [2022-07-14 06:04:27,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:27,284 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2022-07-14 06:04:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:04:27,284 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 [2022-07-14 06:04:27,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:27,285 INFO L225 Difference]: With dead ends: 89 [2022-07-14 06:04:27,285 INFO L226 Difference]: Without dead ends: 89 [2022-07-14 06:04:27,285 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 [2022-07-14 06:04:27,286 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:27,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 70 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-14 06:04:27,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2022-07-14 06:04:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:27,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-07-14 06:04:27,290 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 9 [2022-07-14 06:04:27,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:27,290 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-07-14 06:04:27,290 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) [2022-07-14 06:04:27,291 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-07-14 06:04:27,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:04:27,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:27,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:27,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 06:04:27,291 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:27,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-07-14 06:04:27,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:27,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726543626] [2022-07-14 06:04:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:27,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:27,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:27,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726543626] [2022-07-14 06:04:27,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726543626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:27,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:27,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:04:27,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744317056] [2022-07-14 06:04:27,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:27,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:04:27,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:27,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:04:27,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:04:27,325 INFO L87 Difference]: Start difference. First operand 64 states and 78 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) [2022-07-14 06:04:27,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:27,342 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-07-14 06:04:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:04:27,342 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 [2022-07-14 06:04:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:27,342 INFO L225 Difference]: With dead ends: 63 [2022-07-14 06:04:27,343 INFO L226 Difference]: Without dead ends: 63 [2022-07-14 06:04:27,343 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 [2022-07-14 06:04:27,344 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:27,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 28 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:27,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-14 06:04:27,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2022-07-14 06:04:27,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 52 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:27,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-07-14 06:04:27,347 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 9 [2022-07-14 06:04:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:27,347 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-07-14 06:04:27,347 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) [2022-07-14 06:04:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-07-14 06:04:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:04:27,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:27,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:27,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 06:04:27,348 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-14 06:04:27,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:27,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865385854] [2022-07-14 06:04:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:27,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:27,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865385854] [2022-07-14 06:04:27,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865385854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:27,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:27,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:04:27,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220414372] [2022-07-14 06:04:27,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:27,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:04:27,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:04:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:04:27,407 INFO L87 Difference]: Start difference. First operand 53 states and 64 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) [2022-07-14 06:04:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:27,423 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-07-14 06:04:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:04:27,424 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 [2022-07-14 06:04:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:27,425 INFO L225 Difference]: With dead ends: 52 [2022-07-14 06:04:27,425 INFO L226 Difference]: Without dead ends: 52 [2022-07-14 06:04:27,425 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 [2022-07-14 06:04:27,427 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:27,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 28 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-14 06:04:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-14 06:04:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.4) internal successors, (63), 51 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) [2022-07-14 06:04:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-07-14 06:04:27,435 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 10 [2022-07-14 06:04:27,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:27,435 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-07-14 06:04:27,435 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) [2022-07-14 06:04:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-07-14 06:04:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:04:27,436 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:27,436 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:27,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-14 06:04:27,436 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:27,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:27,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-14 06:04:27,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:27,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312468778] [2022-07-14 06:04:27,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:27,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:27,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:27,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312468778] [2022-07-14 06:04:27,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312468778] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:27,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785368925] [2022-07-14 06:04:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:27,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:27,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:27,500 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) [2022-07-14 06:04:27,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:04:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:27,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:04:27,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:27,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:04:27,604 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 [2022-07-14 06:04:27,609 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 [2022-07-14 06:04:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:27,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:27,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785368925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:27,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:27,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-14 06:04:27,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510273921] [2022-07-14 06:04:27,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:27,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:04:27,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:27,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:04:27,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:04:27,783 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:27,910 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2022-07-14 06:04:27,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:04:27,910 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:04:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:27,911 INFO L225 Difference]: With dead ends: 113 [2022-07-14 06:04:27,911 INFO L226 Difference]: Without dead ends: 113 [2022-07-14 06:04:27,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:04:27,912 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 139 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:27,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 182 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-14 06:04:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 47. [2022-07-14 06:04:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-14 06:04:27,915 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 11 [2022-07-14 06:04:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:27,915 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-14 06:04:27,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-14 06:04:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:04:27,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:27,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:27,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-14 06:04:28,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-14 06:04:28,132 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:28,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:28,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446013, now seen corresponding path program 1 times [2022-07-14 06:04:28,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:28,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789184095] [2022-07-14 06:04:28,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:28,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:28,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:28,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789184095] [2022-07-14 06:04:28,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789184095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:28,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:28,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:04:28,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132364486] [2022-07-14 06:04:28,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:28,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:04:28,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:28,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:04:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:04:28,489 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:29,153 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-07-14 06:04:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:04:29,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:04:29,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:29,154 INFO L225 Difference]: With dead ends: 46 [2022-07-14 06:04:29,154 INFO L226 Difference]: Without dead ends: 46 [2022-07-14 06:04:29,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:04:29,155 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:29,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 65 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:04:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-14 06:04:29,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-14 06:04:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 45 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) [2022-07-14 06:04:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-07-14 06:04:29,157 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 13 [2022-07-14 06:04:29,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:29,157 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-07-14 06:04:29,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:29,157 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-07-14 06:04:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:04:29,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:29,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:29,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 06:04:29,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:29,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446012, now seen corresponding path program 1 times [2022-07-14 06:04:29,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:29,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236531594] [2022-07-14 06:04:29,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:29,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:29,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:29,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236531594] [2022-07-14 06:04:29,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236531594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:29,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:29,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:04:29,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180571391] [2022-07-14 06:04:29,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:29,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:04:29,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:29,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:04:29,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:04:29,273 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:29,330 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-07-14 06:04:29,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:04:29,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 06:04:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:29,331 INFO L225 Difference]: With dead ends: 49 [2022-07-14 06:04:29,331 INFO L226 Difference]: Without dead ends: 49 [2022-07-14 06:04:29,331 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 [2022-07-14 06:04:29,332 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 94 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:29,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 75 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-14 06:04:29,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-07-14 06:04:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.302325581395349) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-07-14 06:04:29,337 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 13 [2022-07-14 06:04:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:29,337 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-07-14 06:04:29,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-07-14 06:04:29,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:04:29,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:29,338 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:29,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-14 06:04:29,339 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:29,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-14 06:04:29,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:29,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318967791] [2022-07-14 06:04:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:29,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:29,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318967791] [2022-07-14 06:04:29,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318967791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:29,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824516145] [2022-07-14 06:04:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:29,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:29,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:29,424 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) [2022-07-14 06:04:29,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:04:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:29,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:04:29,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:29,587 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:04:29,587 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 [2022-07-14 06:04:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:29,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:29,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824516145] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:29,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:29,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-14 06:04:29,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139646010] [2022-07-14 06:04:29,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:29,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:04:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:29,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:04:29,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:04:29,764 INFO L87 Difference]: Start difference. First operand 48 states and 56 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) [2022-07-14 06:04:29,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:29,867 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2022-07-14 06:04:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:04:29,867 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 [2022-07-14 06:04:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:29,868 INFO L225 Difference]: With dead ends: 88 [2022-07-14 06:04:29,868 INFO L226 Difference]: Without dead ends: 88 [2022-07-14 06:04:29,868 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 [2022-07-14 06:04:29,868 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 216 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:29,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 153 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-14 06:04:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 45. [2022-07-14 06:04:29,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:29,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-07-14 06:04:29,871 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 13 [2022-07-14 06:04:29,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:29,871 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-07-14 06:04:29,871 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) [2022-07-14 06:04:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-07-14 06:04:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:04:29,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:29,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:29,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:30,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-14 06:04:30,091 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572955, now seen corresponding path program 1 times [2022-07-14 06:04:30,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:30,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137381964] [2022-07-14 06:04:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:30,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:30,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:30,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137381964] [2022-07-14 06:04:30,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137381964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:30,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:30,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:04:30,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837060940] [2022-07-14 06:04:30,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:30,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:04:30,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:30,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:04:30,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:04:30,142 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:30,204 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-14 06:04:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:04:30,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 06:04:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:30,207 INFO L225 Difference]: With dead ends: 45 [2022-07-14 06:04:30,207 INFO L226 Difference]: Without dead ends: 45 [2022-07-14 06:04:30,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:04:30,207 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:30,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 74 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:30,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-14 06:04:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-07-14 06:04:30,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-07-14 06:04:30,211 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 16 [2022-07-14 06:04:30,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:30,212 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-07-14 06:04:30,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-07-14 06:04:30,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:04:30,215 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:30,215 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:30,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 06:04:30,215 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:30,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1429572954, now seen corresponding path program 1 times [2022-07-14 06:04:30,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:30,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256693899] [2022-07-14 06:04:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:30,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:30,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:30,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256693899] [2022-07-14 06:04:30,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256693899] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:30,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:30,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:04:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945573150] [2022-07-14 06:04:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:30,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:04:30,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:04:30,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:04:30,340 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:30,405 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-07-14 06:04:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:04:30,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 06:04:30,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:30,405 INFO L225 Difference]: With dead ends: 48 [2022-07-14 06:04:30,405 INFO L226 Difference]: Without dead ends: 48 [2022-07-14 06:04:30,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:04:30,408 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:30,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 82 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-14 06:04:30,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-07-14 06:04:30,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:30,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-14 06:04:30,411 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 16 [2022-07-14 06:04:30,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:30,412 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-14 06:04:30,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:30,412 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-14 06:04:30,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 06:04:30,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:30,413 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] [2022-07-14 06:04:30,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-14 06:04:30,414 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2056472215, now seen corresponding path program 1 times [2022-07-14 06:04:30,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:30,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702295760] [2022-07-14 06:04:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:30,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:30,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:30,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702295760] [2022-07-14 06:04:30,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702295760] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:30,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:30,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:04:30,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730049548] [2022-07-14 06:04:30,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:30,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:04:30,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:30,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:04:30,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:04:30,503 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:30,518 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-14 06:04:30,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:04:30,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-14 06:04:30,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:30,519 INFO L225 Difference]: With dead ends: 45 [2022-07-14 06:04:30,519 INFO L226 Difference]: Without dead ends: 43 [2022-07-14 06:04:30,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:04:30,520 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:30,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:04:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-14 06:04:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-14 06:04:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-07-14 06:04:30,523 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 20 [2022-07-14 06:04:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:30,523 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-07-14 06:04:30,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-07-14 06:04:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:04:30,524 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:30,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:30,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-14 06:04:30,524 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:30,525 INFO L85 PathProgramCache]: Analyzing trace with hash 673920784, now seen corresponding path program 1 times [2022-07-14 06:04:30,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:30,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324945340] [2022-07-14 06:04:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:30,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:30,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:30,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324945340] [2022-07-14 06:04:30,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324945340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:30,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:30,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-14 06:04:30,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367183789] [2022-07-14 06:04:30,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:30,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:04:30,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:30,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:04:30,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:04:30,724 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:30,997 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2022-07-14 06:04:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:04:30,998 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 06:04:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:30,998 INFO L225 Difference]: With dead ends: 66 [2022-07-14 06:04:30,998 INFO L226 Difference]: Without dead ends: 66 [2022-07-14 06:04:30,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:04:30,999 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:30,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 209 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-14 06:04:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-07-14 06:04:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 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) [2022-07-14 06:04:31,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2022-07-14 06:04:31,000 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 21 [2022-07-14 06:04:31,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:31,001 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2022-07-14 06:04:31,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2022-07-14 06:04:31,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:04:31,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:31,001 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:31,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-14 06:04:31,001 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:31,002 INFO L85 PathProgramCache]: Analyzing trace with hash 673922962, now seen corresponding path program 1 times [2022-07-14 06:04:31,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:31,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105626171] [2022-07-14 06:04:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:31,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:31,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:31,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105626171] [2022-07-14 06:04:31,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105626171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:31,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:31,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-14 06:04:31,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310635066] [2022-07-14 06:04:31,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:31,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:04:31,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:31,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:04:31,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:04:31,077 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:31,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:31,226 INFO L93 Difference]: Finished difference Result 96 states and 104 transitions. [2022-07-14 06:04:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 06:04:31,226 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 06:04:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:31,227 INFO L225 Difference]: With dead ends: 96 [2022-07-14 06:04:31,227 INFO L226 Difference]: Without dead ends: 81 [2022-07-14 06:04:31,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:04:31,228 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:31,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 184 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-14 06:04:31,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-07-14 06:04:31,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.1571428571428573) internal successors, (81), 71 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) [2022-07-14 06:04:31,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-07-14 06:04:31,229 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 21 [2022-07-14 06:04:31,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:31,230 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-07-14 06:04:31,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:31,230 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-07-14 06:04:31,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:04:31,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:31,230 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:31,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-14 06:04:31,230 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1320221744, now seen corresponding path program 1 times [2022-07-14 06:04:31,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:31,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171972220] [2022-07-14 06:04:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:31,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:31,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:31,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171972220] [2022-07-14 06:04:31,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171972220] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:31,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:31,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-07-14 06:04:31,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489621059] [2022-07-14 06:04:31,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:31,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 06:04:31,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:31,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 06:04:31,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:04:31,347 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:31,584 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2022-07-14 06:04:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:04:31,585 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 06:04:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:31,585 INFO L225 Difference]: With dead ends: 117 [2022-07-14 06:04:31,585 INFO L226 Difference]: Without dead ends: 106 [2022-07-14 06:04:31,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:04:31,586 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:31,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 191 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-14 06:04:31,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 74. [2022-07-14 06:04:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 73 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:31,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-07-14 06:04:31,587 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 21 [2022-07-14 06:04:31,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:31,588 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-07-14 06:04:31,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-07-14 06:04:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:04:31,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:31,588 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:31,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-14 06:04:31,588 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:31,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:31,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1015022958, now seen corresponding path program 1 times [2022-07-14 06:04:31,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:31,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957837042] [2022-07-14 06:04:31,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:31,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:31,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:31,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957837042] [2022-07-14 06:04:31,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957837042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:04:31,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:04:31,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:04:31,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736284074] [2022-07-14 06:04:31,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:04:31,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:04:31,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:31,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:04:31,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:04:31,715 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:31,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:31,840 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2022-07-14 06:04:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:04:31,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 06:04:31,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:31,841 INFO L225 Difference]: With dead ends: 118 [2022-07-14 06:04:31,841 INFO L226 Difference]: Without dead ends: 105 [2022-07-14 06:04:31,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-07-14 06:04:31,842 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 84 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:31,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 178 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-14 06:04:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2022-07-14 06:04:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 75 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) [2022-07-14 06:04:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2022-07-14 06:04:31,843 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 21 [2022-07-14 06:04:31,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:31,844 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2022-07-14 06:04:31,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:31,844 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2022-07-14 06:04:31,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:04:31,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:31,844 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-14 06:04:31,844 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:31,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash -359665389, now seen corresponding path program 1 times [2022-07-14 06:04:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:31,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42026700] [2022-07-14 06:04:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:31,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:31,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42026700] [2022-07-14 06:04:31,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42026700] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276716626] [2022-07-14 06:04:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:31,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:31,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:31,947 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) [2022-07-14 06:04:31,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:04:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 06:04:31,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:32,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:32,242 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 [2022-07-14 06:04:32,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:32,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276716626] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:32,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:32,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-07-14 06:04:32,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450938759] [2022-07-14 06:04:32,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:32,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 06:04:32,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:32,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 06:04:32,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:04:32,263 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:32,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:32,625 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-07-14 06:04:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 06:04:32,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-14 06:04:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:32,626 INFO L225 Difference]: With dead ends: 101 [2022-07-14 06:04:32,626 INFO L226 Difference]: Without dead ends: 101 [2022-07-14 06:04:32,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:04:32,627 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 186 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:32,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 294 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:32,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-14 06:04:32,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2022-07-14 06:04:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.1666666666666667) internal successors, (98), 85 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:32,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 98 transitions. [2022-07-14 06:04:32,629 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 98 transitions. Word has length 25 [2022-07-14 06:04:32,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:32,629 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 98 transitions. [2022-07-14 06:04:32,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:32,629 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 98 transitions. [2022-07-14 06:04:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:04:32,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:32,630 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:32,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:32,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:32,839 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash 501654165, now seen corresponding path program 1 times [2022-07-14 06:04:32,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:32,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843408184] [2022-07-14 06:04:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:32,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:33,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:33,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843408184] [2022-07-14 06:04:33,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843408184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:33,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558801581] [2022-07-14 06:04:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:33,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:33,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:33,180 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) [2022-07-14 06:04:33,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:04:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:33,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-14 06:04:33,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:33,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:04:33,311 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 [2022-07-14 06:04:33,315 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 [2022-07-14 06:04:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:33,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:33,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558801581] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:33,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:33,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-07-14 06:04:33,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941115012] [2022-07-14 06:04:33,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:33,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-14 06:04:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-14 06:04:33,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:04:33,728 INFO L87 Difference]: Start difference. First operand 86 states and 98 transitions. Second operand has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:33,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:33,957 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2022-07-14 06:04:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:04:33,960 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-14 06:04:33,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:33,960 INFO L225 Difference]: With dead ends: 119 [2022-07-14 06:04:33,960 INFO L226 Difference]: Without dead ends: 119 [2022-07-14 06:04:33,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:04:33,961 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 216 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:33,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 293 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-14 06:04:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2022-07-14 06:04:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.158878504672897) internal successors, (124), 108 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2022-07-14 06:04:33,963 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 25 [2022-07-14 06:04:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:33,963 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2022-07-14 06:04:33,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2022-07-14 06:04:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-14 06:04:33,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:33,963 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:33,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:34,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:34,171 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:34,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:34,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1205551803, now seen corresponding path program 2 times [2022-07-14 06:04:34,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:34,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016557890] [2022-07-14 06:04:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:34,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:34,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:34,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016557890] [2022-07-14 06:04:34,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016557890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:34,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314528060] [2022-07-14 06:04:34,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:04:34,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:34,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:34,307 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) [2022-07-14 06:04:34,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:04:34,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:04:34,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:34,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-14 06:04:34,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:34,435 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 [2022-07-14 06:04:34,556 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 [2022-07-14 06:04:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:34,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:34,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:04:34,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:04:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:34,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314528060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:34,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:34,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 27 [2022-07-14 06:04:34,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438289085] [2022-07-14 06:04:34,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:34,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:04:34,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:34,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:04:34,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:04:34,711 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 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) [2022-07-14 06:04:35,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:35,088 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2022-07-14 06:04:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 06:04:35,089 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 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 30 [2022-07-14 06:04:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:35,089 INFO L225 Difference]: With dead ends: 178 [2022-07-14 06:04:35,089 INFO L226 Difference]: Without dead ends: 162 [2022-07-14 06:04:35,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=376, Invalid=1604, Unknown=0, NotChecked=0, Total=1980 [2022-07-14 06:04:35,090 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 226 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:35,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 444 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 280 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-07-14 06:04:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-07-14 06:04:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 148. [2022-07-14 06:04:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.143835616438356) internal successors, (167), 147 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2022-07-14 06:04:35,093 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 30 [2022-07-14 06:04:35,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:35,094 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2022-07-14 06:04:35,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 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) [2022-07-14 06:04:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2022-07-14 06:04:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:04:35,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:35,095 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:35,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-14 06:04:35,307 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,SelfDestructingSolverStorable22 [2022-07-14 06:04:35,307 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:35,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash -512582047, now seen corresponding path program 2 times [2022-07-14 06:04:35,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:35,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397759283] [2022-07-14 06:04:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:35,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:35,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397759283] [2022-07-14 06:04:35,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397759283] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:35,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692879193] [2022-07-14 06:04:35,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:04:35,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:35,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:35,606 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) [2022-07-14 06:04:35,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:04:35,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:04:35,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-14 06:04:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:35,775 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 [2022-07-14 06:04:35,822 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:04:35,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-14 06:04:35,830 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 8 treesize of output 3 [2022-07-14 06:04:36,551 INFO L356 Elim1Store]: treesize reduction 31, result has 27.9 percent of original size [2022-07-14 06:04:36,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 25 [2022-07-14 06:04:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:36,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:37,117 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:37,117 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 34 [2022-07-14 06:04:37,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:04:37,134 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:37,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 65 [2022-07-14 06:04:37,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:04:37,145 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:37,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-07-14 06:04:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:37,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692879193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:37,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:37,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 55 [2022-07-14 06:04:37,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421592584] [2022-07-14 06:04:37,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:37,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-14 06:04:37,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:37,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-14 06:04:37,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=2728, Unknown=0, NotChecked=0, Total=2970 [2022-07-14 06:04:37,444 INFO L87 Difference]: Start difference. First operand 148 states and 167 transitions. Second operand has 55 states, 55 states have (on average 1.509090909090909) internal successors, (83), 55 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) [2022-07-14 06:04:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:38,870 INFO L93 Difference]: Finished difference Result 228 states and 251 transitions. [2022-07-14 06:04:38,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-14 06:04:38,871 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.509090909090909) internal successors, (83), 55 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 33 [2022-07-14 06:04:38,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:38,871 INFO L225 Difference]: With dead ends: 228 [2022-07-14 06:04:38,871 INFO L226 Difference]: Without dead ends: 194 [2022-07-14 06:04:38,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=638, Invalid=5842, Unknown=0, NotChecked=0, Total=6480 [2022-07-14 06:04:38,873 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:38,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 474 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 478 Invalid, 0 Unknown, 249 Unchecked, 0.2s Time] [2022-07-14 06:04:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-14 06:04:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2022-07-14 06:04:38,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.1290322580645162) internal successors, (210), 187 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 210 transitions. [2022-07-14 06:04:38,876 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 210 transitions. Word has length 33 [2022-07-14 06:04:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:38,877 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 210 transitions. [2022-07-14 06:04:38,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.509090909090909) internal successors, (83), 55 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) [2022-07-14 06:04:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 210 transitions. [2022-07-14 06:04:38,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 06:04:38,877 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:38,877 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:38,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:39,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:39,095 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash -740881566, now seen corresponding path program 3 times [2022-07-14 06:04:39,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:39,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785899848] [2022-07-14 06:04:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:39,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:39,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785899848] [2022-07-14 06:04:39,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785899848] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387050441] [2022-07-14 06:04:39,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:04:39,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:39,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:39,238 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) [2022-07-14 06:04:39,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:04:39,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:04:39,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:39,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-14 06:04:39,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:39,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:39,621 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 [2022-07-14 06:04:39,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:39,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387050441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:39,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:39,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-07-14 06:04:39,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452087638] [2022-07-14 06:04:39,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:39,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:04:39,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:39,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:04:39,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:04:39,656 INFO L87 Difference]: Start difference. First operand 188 states and 210 transitions. Second operand has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 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) [2022-07-14 06:04:40,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:40,115 INFO L93 Difference]: Finished difference Result 223 states and 245 transitions. [2022-07-14 06:04:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:04:40,116 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 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) Word has length 34 [2022-07-14 06:04:40,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:40,116 INFO L225 Difference]: With dead ends: 223 [2022-07-14 06:04:40,116 INFO L226 Difference]: Without dead ends: 223 [2022-07-14 06:04:40,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 06:04:40,117 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 252 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:40,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 366 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:04:40,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-14 06:04:40,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 203. [2022-07-14 06:04:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 201 states have (on average 1.1293532338308458) internal successors, (227), 202 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:40,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 227 transitions. [2022-07-14 06:04:40,120 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 227 transitions. Word has length 34 [2022-07-14 06:04:40,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:40,120 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 227 transitions. [2022-07-14 06:04:40,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.84) internal successors, (71), 26 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) [2022-07-14 06:04:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 227 transitions. [2022-07-14 06:04:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 06:04:40,121 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:40,121 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:40,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:40,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:40,321 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:40,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1700374044, now seen corresponding path program 3 times [2022-07-14 06:04:40,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:40,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153758845] [2022-07-14 06:04:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:40,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:40,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:40,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153758845] [2022-07-14 06:04:40,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153758845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:40,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775146087] [2022-07-14 06:04:40,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:04:40,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:40,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:40,452 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) [2022-07-14 06:04:40,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 06:04:40,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:04:40,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:40,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-14 06:04:40,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:40,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:40,797 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 [2022-07-14 06:04:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:40,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775146087] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:40,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:40,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-14 06:04:40,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908388384] [2022-07-14 06:04:40,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:40,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 06:04:40,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:40,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 06:04:40,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:04:40,818 INFO L87 Difference]: Start difference. First operand 203 states and 227 transitions. Second operand has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 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) [2022-07-14 06:04:41,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:41,199 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2022-07-14 06:04:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:04:41,200 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 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) Word has length 37 [2022-07-14 06:04:41,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:41,201 INFO L225 Difference]: With dead ends: 306 [2022-07-14 06:04:41,201 INFO L226 Difference]: Without dead ends: 306 [2022-07-14 06:04:41,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 06:04:41,201 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 230 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:41,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 593 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:04:41,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-07-14 06:04:41,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 244. [2022-07-14 06:04:41,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 242 states have (on average 1.128099173553719) internal successors, (273), 243 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:41,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 273 transitions. [2022-07-14 06:04:41,206 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 273 transitions. Word has length 37 [2022-07-14 06:04:41,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:41,206 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 273 transitions. [2022-07-14 06:04:41,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.409090909090909) internal successors, (75), 23 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) [2022-07-14 06:04:41,206 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 273 transitions. [2022-07-14 06:04:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-14 06:04:41,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:41,206 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:41,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:41,419 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,SelfDestructingSolverStorable25 [2022-07-14 06:04:41,419 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:41,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:41,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1745665110, now seen corresponding path program 4 times [2022-07-14 06:04:41,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:41,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578968076] [2022-07-14 06:04:41,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:41,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:41,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:41,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578968076] [2022-07-14 06:04:41,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578968076] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:41,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926404808] [2022-07-14 06:04:41,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:04:41,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:41,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:41,584 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) [2022-07-14 06:04:41,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 06:04:41,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:04:41,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:41,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:04:41,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:41,654 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:04:41,654 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 [2022-07-14 06:04:41,777 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 [2022-07-14 06:04:42,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:04:42,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-14 06:04:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:42,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:42,380 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 13 treesize of output 11 [2022-07-14 06:04:42,382 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 20 treesize of output 18 [2022-07-14 06:04:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:42,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926404808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:42,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:42,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 41 [2022-07-14 06:04:42,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351666328] [2022-07-14 06:04:42,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:42,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:04:42,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:42,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:04:42,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:04:42,622 INFO L87 Difference]: Start difference. First operand 244 states and 273 transitions. Second operand has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:43,115 INFO L93 Difference]: Finished difference Result 347 states and 381 transitions. [2022-07-14 06:04:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 06:04:43,116 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-14 06:04:43,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:43,117 INFO L225 Difference]: With dead ends: 347 [2022-07-14 06:04:43,117 INFO L226 Difference]: Without dead ends: 326 [2022-07-14 06:04:43,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=399, Invalid=3383, Unknown=0, NotChecked=0, Total=3782 [2022-07-14 06:04:43,119 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 132 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:43,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 604 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 302 Invalid, 0 Unknown, 169 Unchecked, 0.1s Time] [2022-07-14 06:04:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-14 06:04:43,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 298. [2022-07-14 06:04:43,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 296 states have (on average 1.1216216216216217) internal successors, (332), 297 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:43,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 332 transitions. [2022-07-14 06:04:43,125 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 332 transitions. Word has length 39 [2022-07-14 06:04:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:43,125 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 332 transitions. [2022-07-14 06:04:43,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4146341463414633) internal successors, (99), 41 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:43,130 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 332 transitions. [2022-07-14 06:04:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:04:43,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:43,131 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:43,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:43,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-14 06:04:43,339 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:43,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2029158230, now seen corresponding path program 1 times [2022-07-14 06:04:43,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:43,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136839292] [2022-07-14 06:04:43,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:43,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:04:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:43,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136839292] [2022-07-14 06:04:43,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136839292] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:43,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248253352] [2022-07-14 06:04:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:43,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:43,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:43,419 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) [2022-07-14 06:04:43,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 06:04:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:43,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-14 06:04:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:43,532 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 6 treesize of output 5 [2022-07-14 06:04:43,663 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 16 treesize of output 8 [2022-07-14 06:04:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:04:43,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:04:43,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248253352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:43,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:43,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 24 [2022-07-14 06:04:43,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756343143] [2022-07-14 06:04:43,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:43,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:04:43,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:04:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:04:43,763 INFO L87 Difference]: Start difference. First operand 298 states and 332 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 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) [2022-07-14 06:04:43,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:43,956 INFO L93 Difference]: Finished difference Result 335 states and 370 transitions. [2022-07-14 06:04:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:04:43,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 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) Word has length 42 [2022-07-14 06:04:43,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:43,958 INFO L225 Difference]: With dead ends: 335 [2022-07-14 06:04:43,958 INFO L226 Difference]: Without dead ends: 335 [2022-07-14 06:04:43,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=1197, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 06:04:43,958 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 102 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:43,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 394 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:43,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-07-14 06:04:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 318. [2022-07-14 06:04:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 316 states have (on average 1.120253164556962) internal successors, (354), 317 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 354 transitions. [2022-07-14 06:04:43,962 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 354 transitions. Word has length 42 [2022-07-14 06:04:43,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:43,962 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 354 transitions. [2022-07-14 06:04:43,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 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) [2022-07-14 06:04:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 354 transitions. [2022-07-14 06:04:43,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-14 06:04:43,963 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:43,963 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:43,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:44,163 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,SelfDestructingSolverStorable27 [2022-07-14 06:04:44,164 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:44,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:44,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1633943257, now seen corresponding path program 5 times [2022-07-14 06:04:44,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:44,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099350748] [2022-07-14 06:04:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:44,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:44,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:44,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099350748] [2022-07-14 06:04:44,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099350748] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:44,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058739136] [2022-07-14 06:04:44,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:04:44,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:44,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:44,332 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) [2022-07-14 06:04:44,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 06:04:44,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-14 06:04:44,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:44,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-14 06:04:44,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:44,421 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:04:44,421 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 [2022-07-14 06:04:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:44,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:45,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058739136] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:45,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:45,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-07-14 06:04:45,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119528398] [2022-07-14 06:04:45,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:45,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 06:04:45,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:45,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 06:04:45,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:04:45,050 INFO L87 Difference]: Start difference. First operand 318 states and 354 transitions. Second operand has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:45,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:45,641 INFO L93 Difference]: Finished difference Result 429 states and 473 transitions. [2022-07-14 06:04:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:04:45,641 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-14 06:04:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:45,642 INFO L225 Difference]: With dead ends: 429 [2022-07-14 06:04:45,642 INFO L226 Difference]: Without dead ends: 429 [2022-07-14 06:04:45,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=445, Invalid=1811, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 06:04:45,643 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 260 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:45,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 487 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:04:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-07-14 06:04:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 398. [2022-07-14 06:04:45,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 396 states have (on average 1.128787878787879) internal successors, (447), 397 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:45,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 447 transitions. [2022-07-14 06:04:45,648 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 447 transitions. Word has length 43 [2022-07-14 06:04:45,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:45,648 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 447 transitions. [2022-07-14 06:04:45,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 32 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:45,649 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 447 transitions. [2022-07-14 06:04:45,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-14 06:04:45,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:45,649 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:45,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:45,858 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,SelfDestructingSolverStorable28 [2022-07-14 06:04:45,858 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:45,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:45,858 INFO L85 PathProgramCache]: Analyzing trace with hash -609642832, now seen corresponding path program 4 times [2022-07-14 06:04:45,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:45,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913645001] [2022-07-14 06:04:45,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:45,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:46,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:46,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913645001] [2022-07-14 06:04:46,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913645001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:46,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122267460] [2022-07-14 06:04:46,108 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:04:46,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:46,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:46,109 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) [2022-07-14 06:04:46,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 06:04:46,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:04:46,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:04:46,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:46,220 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:04:46,221 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 [2022-07-14 06:04:46,233 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 [2022-07-14 06:04:46,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:04:46,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:04:46,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:04:46,695 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-14 06:04:46,698 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 [2022-07-14 06:04:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:46,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:47,072 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:47,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-14 06:04:47,078 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:47,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-14 06:04:47,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-14 06:04:47,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:04:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:47,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122267460] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:47,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:47,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 43 [2022-07-14 06:04:47,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594749072] [2022-07-14 06:04:47,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:47,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 06:04:47,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:47,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 06:04:47,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1653, Unknown=20, NotChecked=0, Total=1806 [2022-07-14 06:04:47,347 INFO L87 Difference]: Start difference. First operand 398 states and 447 transitions. Second operand has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 43 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) [2022-07-14 06:04:48,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:48,023 INFO L93 Difference]: Finished difference Result 752 states and 838 transitions. [2022-07-14 06:04:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-14 06:04:48,023 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 43 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) Word has length 45 [2022-07-14 06:04:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:48,024 INFO L225 Difference]: With dead ends: 752 [2022-07-14 06:04:48,025 INFO L226 Difference]: Without dead ends: 723 [2022-07-14 06:04:48,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=431, Invalid=4519, Unknown=20, NotChecked=0, Total=4970 [2022-07-14 06:04:48,026 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 116 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:48,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 857 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 357 Invalid, 0 Unknown, 134 Unchecked, 0.1s Time] [2022-07-14 06:04:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-07-14 06:04:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 477. [2022-07-14 06:04:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 475 states have (on average 1.128421052631579) internal successors, (536), 476 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 536 transitions. [2022-07-14 06:04:48,032 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 536 transitions. Word has length 45 [2022-07-14 06:04:48,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:48,033 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 536 transitions. [2022-07-14 06:04:48,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 43 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) [2022-07-14 06:04:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 536 transitions. [2022-07-14 06:04:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-14 06:04:48,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:48,033 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:48,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-14 06:04:48,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:48,251 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash -317766582, now seen corresponding path program 2 times [2022-07-14 06:04:48,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:48,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926630429] [2022-07-14 06:04:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:48,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:04:48,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:48,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926630429] [2022-07-14 06:04:48,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926630429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:48,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222554376] [2022-07-14 06:04:48,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:04:48,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:48,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:48,433 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) [2022-07-14 06:04:48,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 06:04:48,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:04:48,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:48,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-14 06:04:48,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:48,511 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 [2022-07-14 06:04:48,598 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 [2022-07-14 06:04:48,618 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 [2022-07-14 06:04:48,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:04:48,732 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:48,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-07-14 06:04:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:04:48,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:48,830 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_53| Int) (v_ArrVal_465 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_465) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_53| 1)) 0) (not (<= 0 |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_53|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcspn_#t~post2#1.offset_53|))) is different from false [2022-07-14 06:04:48,836 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:48,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-14 06:04:48,840 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:48,840 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 [2022-07-14 06:04:48,843 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 [2022-07-14 06:04:49,048 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:04:49,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222554376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:49,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:49,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-07-14 06:04:49,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199058820] [2022-07-14 06:04:49,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:49,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-14 06:04:49,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:49,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-14 06:04:49,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=883, Unknown=1, NotChecked=60, Total=1056 [2022-07-14 06:04:49,049 INFO L87 Difference]: Start difference. First operand 477 states and 536 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 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) [2022-07-14 06:04:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:49,371 INFO L93 Difference]: Finished difference Result 576 states and 637 transitions. [2022-07-14 06:04:49,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-14 06:04:49,371 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-07-14 06:04:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:49,373 INFO L225 Difference]: With dead ends: 576 [2022-07-14 06:04:49,373 INFO L226 Difference]: Without dead ends: 547 [2022-07-14 06:04:49,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=1389, Unknown=1, NotChecked=76, Total=1640 [2022-07-14 06:04:49,374 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 103 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:49,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 775 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 323 Invalid, 0 Unknown, 219 Unchecked, 0.1s Time] [2022-07-14 06:04:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-07-14 06:04:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 502. [2022-07-14 06:04:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 500 states have (on average 1.128) internal successors, (564), 501 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 564 transitions. [2022-07-14 06:04:49,380 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 564 transitions. Word has length 47 [2022-07-14 06:04:49,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:49,380 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 564 transitions. [2022-07-14 06:04:49,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 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) [2022-07-14 06:04:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 564 transitions. [2022-07-14 06:04:49,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:04:49,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:49,381 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:49,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:49,599 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,SelfDestructingSolverStorable30 [2022-07-14 06:04:49,599 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash -424649921, now seen corresponding path program 6 times [2022-07-14 06:04:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:49,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695495863] [2022-07-14 06:04:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:49,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:49,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695495863] [2022-07-14 06:04:49,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695495863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405551803] [2022-07-14 06:04:49,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:04:49,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:49,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:49,786 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) [2022-07-14 06:04:49,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 06:04:49,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-14 06:04:49,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:49,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-14 06:04:49,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:49,957 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 [2022-07-14 06:04:50,081 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 [2022-07-14 06:04:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:50,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:50,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:04:50,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:04:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:50,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405551803] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:50,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:50,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2022-07-14 06:04:50,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961543641] [2022-07-14 06:04:50,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:50,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-14 06:04:50,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:50,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-14 06:04:50,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:04:50,257 INFO L87 Difference]: Start difference. First operand 502 states and 564 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 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) [2022-07-14 06:04:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:51,031 INFO L93 Difference]: Finished difference Result 755 states and 830 transitions. [2022-07-14 06:04:51,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-14 06:04:51,031 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 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 48 [2022-07-14 06:04:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:51,033 INFO L225 Difference]: With dead ends: 755 [2022-07-14 06:04:51,033 INFO L226 Difference]: Without dead ends: 691 [2022-07-14 06:04:51,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=455, Invalid=2851, Unknown=0, NotChecked=0, Total=3306 [2022-07-14 06:04:51,034 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 375 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1031 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:51,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1031 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 803 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2022-07-14 06:04:51,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-07-14 06:04:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 629. [2022-07-14 06:04:51,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 627 states have (on average 1.1259968102073366) internal successors, (706), 628 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 706 transitions. [2022-07-14 06:04:51,043 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 706 transitions. Word has length 48 [2022-07-14 06:04:51,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:51,043 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 706 transitions. [2022-07-14 06:04:51,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 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) [2022-07-14 06:04:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 706 transitions. [2022-07-14 06:04:51,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:04:51,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:51,044 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:51,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:51,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:51,245 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash 589899187, now seen corresponding path program 5 times [2022-07-14 06:04:51,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:51,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836221665] [2022-07-14 06:04:51,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:51,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:51,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:51,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836221665] [2022-07-14 06:04:51,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836221665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:51,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269365328] [2022-07-14 06:04:51,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:04:51,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:51,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:51,379 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) [2022-07-14 06:04:51,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 06:04:51,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-14 06:04:51,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:51,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-14 06:04:51,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:51,496 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:04:51,496 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 [2022-07-14 06:04:51,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:04:51,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:04:51,789 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:51,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-07-14 06:04:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:51,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:52,285 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 31 treesize of output 27 [2022-07-14 06:04:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:52,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269365328] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:52,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:52,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 41 [2022-07-14 06:04:52,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168725856] [2022-07-14 06:04:52,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:52,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:04:52,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:04:52,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:04:52,479 INFO L87 Difference]: Start difference. First operand 629 states and 706 transitions. Second operand has 42 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 42 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:53,271 INFO L93 Difference]: Finished difference Result 922 states and 1025 transitions. [2022-07-14 06:04:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-14 06:04:53,271 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 42 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-14 06:04:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:53,273 INFO L225 Difference]: With dead ends: 922 [2022-07-14 06:04:53,273 INFO L226 Difference]: Without dead ends: 922 [2022-07-14 06:04:53,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=3291, Unknown=0, NotChecked=0, Total=3660 [2022-07-14 06:04:53,274 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 178 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:53,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 975 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 979 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-14 06:04:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-07-14 06:04:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 760. [2022-07-14 06:04:53,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 758 states have (on average 1.1226912928759893) internal successors, (851), 759 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 851 transitions. [2022-07-14 06:04:53,283 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 851 transitions. Word has length 49 [2022-07-14 06:04:53,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:53,283 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 851 transitions. [2022-07-14 06:04:53,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 42 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:53,283 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 851 transitions. [2022-07-14 06:04:53,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:04:53,294 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:53,294 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:53,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:53,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:53,522 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:53,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:53,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1878539292, now seen corresponding path program 7 times [2022-07-14 06:04:53,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:53,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991426463] [2022-07-14 06:04:53,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:53,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:53,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:53,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991426463] [2022-07-14 06:04:53,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991426463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:53,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331547233] [2022-07-14 06:04:53,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:04:53,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:53,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:53,695 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) [2022-07-14 06:04:53,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 06:04:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:53,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-14 06:04:53,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:53,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:54,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:04:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:54,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331547233] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:54,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:54,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2022-07-14 06:04:54,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835242841] [2022-07-14 06:04:54,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:54,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-14 06:04:54,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:54,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-14 06:04:54,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:04:54,211 INFO L87 Difference]: Start difference. First operand 760 states and 851 transitions. Second operand has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 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) [2022-07-14 06:04:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:54,792 INFO L93 Difference]: Finished difference Result 873 states and 964 transitions. [2022-07-14 06:04:54,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:04:54,792 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-14 06:04:54,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:54,794 INFO L225 Difference]: With dead ends: 873 [2022-07-14 06:04:54,799 INFO L226 Difference]: Without dead ends: 873 [2022-07-14 06:04:54,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=517, Invalid=2239, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 06:04:54,800 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 438 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 911 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:54,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 815 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 911 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:04:54,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-07-14 06:04:54,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 790. [2022-07-14 06:04:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 788 states have (on average 1.1243654822335025) internal successors, (886), 789 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 886 transitions. [2022-07-14 06:04:54,809 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 886 transitions. Word has length 52 [2022-07-14 06:04:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:54,809 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 886 transitions. [2022-07-14 06:04:54,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 35 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) [2022-07-14 06:04:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 886 transitions. [2022-07-14 06:04:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-14 06:04:54,810 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:54,811 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:54,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:55,017 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,SelfDestructingSolverStorable33 [2022-07-14 06:04:55,018 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:55,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:55,018 INFO L85 PathProgramCache]: Analyzing trace with hash -383640285, now seen corresponding path program 3 times [2022-07-14 06:04:55,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:55,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935946186] [2022-07-14 06:04:55,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:55,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:04:55,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:55,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935946186] [2022-07-14 06:04:55,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935946186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:55,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68311079] [2022-07-14 06:04:55,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:04:55,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:55,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:55,111 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) [2022-07-14 06:04:55,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 06:04:55,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:04:55,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:55,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-14 06:04:55,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:55,246 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 6 treesize of output 5 [2022-07-14 06:04:55,339 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 [2022-07-14 06:04:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:04:55,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 37 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:04:55,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68311079] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:55,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:55,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 24 [2022-07-14 06:04:55,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688454889] [2022-07-14 06:04:55,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:55,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 06:04:55,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:55,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 06:04:55,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-07-14 06:04:55,389 INFO L87 Difference]: Start difference. First operand 790 states and 886 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:55,714 INFO L93 Difference]: Finished difference Result 837 states and 912 transitions. [2022-07-14 06:04:55,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:04:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-07-14 06:04:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:55,715 INFO L225 Difference]: With dead ends: 837 [2022-07-14 06:04:55,716 INFO L226 Difference]: Without dead ends: 773 [2022-07-14 06:04:55,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 06:04:55,716 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:55,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 343 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:04:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-07-14 06:04:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 630. [2022-07-14 06:04:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 628 states have (on average 1.1178343949044587) internal successors, (702), 629 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 702 transitions. [2022-07-14 06:04:55,737 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 702 transitions. Word has length 54 [2022-07-14 06:04:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:55,737 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 702 transitions. [2022-07-14 06:04:55,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 702 transitions. [2022-07-14 06:04:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-14 06:04:55,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:55,751 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:55,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:55,964 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:55,965 INFO L85 PathProgramCache]: Analyzing trace with hash 52758665, now seen corresponding path program 1 times [2022-07-14 06:04:55,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:55,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273760171] [2022-07-14 06:04:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:56,405 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 52 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:04:56,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273760171] [2022-07-14 06:04:56,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273760171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:56,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128829281] [2022-07-14 06:04:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:56,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:56,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:56,406 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) [2022-07-14 06:04:56,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-14 06:04:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:56,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-14 06:04:56,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:56,578 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 [2022-07-14 06:04:56,741 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 [2022-07-14 06:04:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:04:56,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:04:56,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:04:56,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:04:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:04:56,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128829281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:04:56,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:04:56,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 15] total 34 [2022-07-14 06:04:56,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241245520] [2022-07-14 06:04:56,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:04:56,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-14 06:04:56,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:04:56,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-14 06:04:56,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 06:04:56,940 INFO L87 Difference]: Start difference. First operand 630 states and 702 transitions. Second operand has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:04:58,806 INFO L93 Difference]: Finished difference Result 795 states and 858 transitions. [2022-07-14 06:04:58,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-14 06:04:58,806 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-14 06:04:58,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:04:58,808 INFO L225 Difference]: With dead ends: 795 [2022-07-14 06:04:58,808 INFO L226 Difference]: Without dead ends: 753 [2022-07-14 06:04:58,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=769, Invalid=5237, Unknown=0, NotChecked=0, Total=6006 [2022-07-14 06:04:58,810 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 385 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1271 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:04:58,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1271 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 928 Invalid, 0 Unknown, 412 Unchecked, 0.4s Time] [2022-07-14 06:04:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-07-14 06:04:58,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 582. [2022-07-14 06:04:58,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 580 states have (on average 1.1120689655172413) internal successors, (645), 581 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:58,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 645 transitions. [2022-07-14 06:04:58,827 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 645 transitions. Word has length 56 [2022-07-14 06:04:58,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:04:58,827 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 645 transitions. [2022-07-14 06:04:58,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:04:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 645 transitions. [2022-07-14 06:04:58,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:04:58,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:04:58,828 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:04:58,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:04:59,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:59,029 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:04:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:04:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1586425820, now seen corresponding path program 8 times [2022-07-14 06:04:59,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:04:59,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57143770] [2022-07-14 06:04:59,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:04:59,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:04:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:04:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:04:59,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:04:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57143770] [2022-07-14 06:04:59,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57143770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:04:59,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948192420] [2022-07-14 06:04:59,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:04:59,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:04:59,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:04:59,242 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) [2022-07-14 06:04:59,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 06:04:59,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:04:59,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:04:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-14 06:04:59,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:04:59,401 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 [2022-07-14 06:04:59,884 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:04:59,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-14 06:05:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:00,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:00,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:00,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:05:00,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-14 06:05:00,558 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 15 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:00,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948192420] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:00,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:00,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 52 [2022-07-14 06:05:00,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42524198] [2022-07-14 06:05:00,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:00,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 06:05:00,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:00,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 06:05:00,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2463, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 06:05:00,563 INFO L87 Difference]: Start difference. First operand 582 states and 645 transitions. Second operand has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:02,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:02,617 INFO L93 Difference]: Finished difference Result 1006 states and 1088 transitions. [2022-07-14 06:05:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-14 06:05:02,617 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-14 06:05:02,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:02,619 INFO L225 Difference]: With dead ends: 1006 [2022-07-14 06:05:02,619 INFO L226 Difference]: Without dead ends: 975 [2022-07-14 06:05:02,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=584, Invalid=7426, Unknown=0, NotChecked=0, Total=8010 [2022-07-14 06:05:02,620 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 378 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:02,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 2240 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1537 Invalid, 0 Unknown, 763 Unchecked, 0.5s Time] [2022-07-14 06:05:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-07-14 06:05:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 722. [2022-07-14 06:05:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 720 states have (on average 1.1125) internal successors, (801), 721 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:02,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 801 transitions. [2022-07-14 06:05:02,628 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 801 transitions. Word has length 57 [2022-07-14 06:05:02,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:02,628 INFO L495 AbstractCegarLoop]: Abstraction has 722 states and 801 transitions. [2022-07-14 06:05:02,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.730769230769231) internal successors, (142), 52 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:02,629 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 801 transitions. [2022-07-14 06:05:02,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:05:02,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:02,629 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:02,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:02,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:02,847 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:02,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:02,847 INFO L85 PathProgramCache]: Analyzing trace with hash -377019521, now seen corresponding path program 6 times [2022-07-14 06:05:02,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:02,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172265467] [2022-07-14 06:05:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:02,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:03,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:03,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172265467] [2022-07-14 06:05:03,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172265467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:03,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141455238] [2022-07-14 06:05:03,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:05:03,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:03,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:03,146 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) [2022-07-14 06:05:03,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-14 06:05:03,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-14 06:05:03,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:03,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-14 06:05:03,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:03,279 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:03,279 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 [2022-07-14 06:05:03,485 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 [2022-07-14 06:05:03,546 INFO L356 Elim1Store]: treesize reduction 38, result has 20.8 percent of original size [2022-07-14 06:05:03,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-14 06:05:04,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:05:04,025 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-07-14 06:05:04,026 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 10 [2022-07-14 06:05:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:04,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:04,342 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 56 treesize of output 50 [2022-07-14 06:05:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 8 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:04,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141455238] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:04,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:04,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 45 [2022-07-14 06:05:04,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454309855] [2022-07-14 06:05:04,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:04,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-14 06:05:04,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:04,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-14 06:05:04,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1838, Unknown=0, NotChecked=0, Total=1980 [2022-07-14 06:05:04,724 INFO L87 Difference]: Start difference. First operand 722 states and 801 transitions. Second operand has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 45 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:05,811 INFO L93 Difference]: Finished difference Result 1498 states and 1636 transitions. [2022-07-14 06:05:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-14 06:05:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 45 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-14 06:05:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:05,814 INFO L225 Difference]: With dead ends: 1498 [2022-07-14 06:05:05,814 INFO L226 Difference]: Without dead ends: 1206 [2022-07-14 06:05:05,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=346, Invalid=4910, Unknown=0, NotChecked=0, Total=5256 [2022-07-14 06:05:05,815 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 249 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 439 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:05,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 1949 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1114 Invalid, 0 Unknown, 439 Unchecked, 0.4s Time] [2022-07-14 06:05:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2022-07-14 06:05:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 859. [2022-07-14 06:05:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 857 states have (on average 1.1143523920653442) internal successors, (955), 858 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 955 transitions. [2022-07-14 06:05:05,827 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 955 transitions. Word has length 57 [2022-07-14 06:05:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:05,837 INFO L495 AbstractCegarLoop]: Abstraction has 859 states and 955 transitions. [2022-07-14 06:05:05,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 45 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 955 transitions. [2022-07-14 06:05:05,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-14 06:05:05,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:05,838 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:05,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:06,055 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,SelfDestructingSolverStorable37 [2022-07-14 06:05:06,055 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:06,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:06,056 INFO L85 PathProgramCache]: Analyzing trace with hash -424589822, now seen corresponding path program 7 times [2022-07-14 06:05:06,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:06,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797180673] [2022-07-14 06:05:06,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:06,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:06,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:06,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797180673] [2022-07-14 06:05:06,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797180673] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:06,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299061085] [2022-07-14 06:05:06,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:05:06,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:06,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:06,196 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) [2022-07-14 06:05:06,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-14 06:05:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:06,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-14 06:05:06,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:06,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:06,716 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 [2022-07-14 06:05:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:06,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299061085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:06,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:06,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2022-07-14 06:05:06,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907236446] [2022-07-14 06:05:06,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:06,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-14 06:05:06,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-14 06:05:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:05:06,744 INFO L87 Difference]: Start difference. First operand 859 states and 955 transitions. Second operand has 31 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:07,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:07,324 INFO L93 Difference]: Finished difference Result 1296 states and 1426 transitions. [2022-07-14 06:05:07,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:05:07,326 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-14 06:05:07,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:07,328 INFO L225 Difference]: With dead ends: 1296 [2022-07-14 06:05:07,328 INFO L226 Difference]: Without dead ends: 1296 [2022-07-14 06:05:07,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 06:05:07,329 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 339 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:07,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 1115 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:05:07,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-07-14 06:05:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 951. [2022-07-14 06:05:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 949 states have (on average 1.1116965226554267) internal successors, (1055), 950 states have internal predecessors, (1055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1055 transitions. [2022-07-14 06:05:07,338 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1055 transitions. Word has length 61 [2022-07-14 06:05:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:07,338 INFO L495 AbstractCegarLoop]: Abstraction has 951 states and 1055 transitions. [2022-07-14 06:05:07,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.1) internal successors, (123), 31 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1055 transitions. [2022-07-14 06:05:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-14 06:05:07,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:07,339 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:07,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:07,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-14 06:05:07,553 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:07,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:07,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1914242811, now seen corresponding path program 4 times [2022-07-14 06:05:07,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:07,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125591533] [2022-07-14 06:05:07,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:07,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:07,859 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 77 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-14 06:05:07,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125591533] [2022-07-14 06:05:07,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125591533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:07,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994163940] [2022-07-14 06:05:07,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:05:07,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:07,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:07,861 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) [2022-07-14 06:05:07,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 06:05:07,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:05:07,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:07,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 126 conjunts are in the unsatisfiable core [2022-07-14 06:05:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:07,992 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:07,993 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 [2022-07-14 06:05:08,022 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 [2022-07-14 06:05:08,302 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 [2022-07-14 06:05:08,342 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 [2022-07-14 06:05:09,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:05:09,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:05:09,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:05:09,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-07-14 06:05:09,742 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:05:09,742 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 21 treesize of output 17 [2022-07-14 06:05:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:05:09,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:11,415 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:11,415 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 45 treesize of output 34 [2022-07-14 06:05:11,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:05:11,427 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:11,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 65 [2022-07-14 06:05:11,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:05:11,442 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:11,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-07-14 06:05:12,875 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 32 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-14 06:05:12,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994163940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:12,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:12,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 32, 33] total 75 [2022-07-14 06:05:12,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312335678] [2022-07-14 06:05:12,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:12,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-14 06:05:12,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:12,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-14 06:05:12,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=5034, Unknown=1, NotChecked=0, Total=5550 [2022-07-14 06:05:12,893 INFO L87 Difference]: Start difference. First operand 951 states and 1055 transitions. Second operand has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:17,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:17,876 INFO L93 Difference]: Finished difference Result 1199 states and 1311 transitions. [2022-07-14 06:05:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-14 06:05:17,876 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-14 06:05:17,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:17,879 INFO L225 Difference]: With dead ends: 1199 [2022-07-14 06:05:17,879 INFO L226 Difference]: Without dead ends: 1075 [2022-07-14 06:05:17,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4210 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1683, Invalid=18053, Unknown=4, NotChecked=0, Total=19740 [2022-07-14 06:05:17,880 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 257 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:17,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 710 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 552 Invalid, 0 Unknown, 679 Unchecked, 0.3s Time] [2022-07-14 06:05:17,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-07-14 06:05:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 974. [2022-07-14 06:05:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 972 states have (on average 1.1080246913580247) internal successors, (1077), 973 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1077 transitions. [2022-07-14 06:05:17,909 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1077 transitions. Word has length 64 [2022-07-14 06:05:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:17,909 INFO L495 AbstractCegarLoop]: Abstraction has 974 states and 1077 transitions. [2022-07-14 06:05:17,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1077 transitions. [2022-07-14 06:05:17,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-14 06:05:17,910 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:17,911 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:17,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:18,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-14 06:05:18,127 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:18,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:18,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1455608263, now seen corresponding path program 9 times [2022-07-14 06:05:18,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:18,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346436437] [2022-07-14 06:05:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:18,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:18,403 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:18,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:18,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346436437] [2022-07-14 06:05:18,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346436437] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:18,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799933118] [2022-07-14 06:05:18,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:05:18,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:18,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:18,405 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) [2022-07-14 06:05:18,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-14 06:05:18,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-14 06:05:18,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:18,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-14 06:05:18,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:18,657 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 [2022-07-14 06:05:18,814 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 [2022-07-14 06:05:18,817 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:18,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:18,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:18,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:05:19,018 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:19,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799933118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:19,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:19,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 39 [2022-07-14 06:05:19,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123865893] [2022-07-14 06:05:19,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:19,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-14 06:05:19,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:19,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-14 06:05:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 06:05:19,019 INFO L87 Difference]: Start difference. First operand 974 states and 1077 transitions. Second operand has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:20,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:20,440 INFO L93 Difference]: Finished difference Result 1937 states and 2122 transitions. [2022-07-14 06:05:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-14 06:05:20,441 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-14 06:05:20,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:20,445 INFO L225 Difference]: With dead ends: 1937 [2022-07-14 06:05:20,445 INFO L226 Difference]: Without dead ends: 1901 [2022-07-14 06:05:20,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=4459, Unknown=0, NotChecked=0, Total=5112 [2022-07-14 06:05:20,454 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 422 mSDsluCounter, 2351 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 2488 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:20,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 2488 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1874 Invalid, 0 Unknown, 60 Unchecked, 0.7s Time] [2022-07-14 06:05:20,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2022-07-14 06:05:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1362. [2022-07-14 06:05:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1360 states have (on average 1.1154411764705883) internal successors, (1517), 1361 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1517 transitions. [2022-07-14 06:05:20,508 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1517 transitions. Word has length 66 [2022-07-14 06:05:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:20,508 INFO L495 AbstractCegarLoop]: Abstraction has 1362 states and 1517 transitions. [2022-07-14 06:05:20,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7948717948717947) internal successors, (109), 39 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1517 transitions. [2022-07-14 06:05:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-14 06:05:20,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:20,510 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:20,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:20,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:20,727 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:20,728 INFO L85 PathProgramCache]: Analyzing trace with hash -200440626, now seen corresponding path program 8 times [2022-07-14 06:05:20,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:20,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909839503] [2022-07-14 06:05:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:20,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:21,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:21,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909839503] [2022-07-14 06:05:21,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909839503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:21,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017779052] [2022-07-14 06:05:21,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:05:21,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:21,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:21,420 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) [2022-07-14 06:05:21,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-14 06:05:21,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:05:21,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:21,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-14 06:05:21,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:21,624 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:21,624 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 [2022-07-14 06:05:22,174 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 [2022-07-14 06:05:22,181 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:05:22,181 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 13 treesize of output 13 [2022-07-14 06:05:22,225 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 [2022-07-14 06:05:22,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:05:22,691 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:22,691 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 [2022-07-14 06:05:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:22,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:22,808 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_850 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_850) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:05:22,813 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:22,813 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 [2022-07-14 06:05:22,819 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:22,819 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 [2022-07-14 06:05:22,822 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 [2022-07-14 06:05:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 10 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:23,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017779052] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:23,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:23,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 52 [2022-07-14 06:05:23,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353784963] [2022-07-14 06:05:23,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:23,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 06:05:23,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:23,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 06:05:23,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2415, Unknown=1, NotChecked=98, Total=2652 [2022-07-14 06:05:23,378 INFO L87 Difference]: Start difference. First operand 1362 states and 1517 transitions. Second operand has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:24,834 INFO L93 Difference]: Finished difference Result 2623 states and 2889 transitions. [2022-07-14 06:05:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-14 06:05:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-14 06:05:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:24,839 INFO L225 Difference]: With dead ends: 2623 [2022-07-14 06:05:24,839 INFO L226 Difference]: Without dead ends: 2259 [2022-07-14 06:05:24,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=305, Invalid=5247, Unknown=2, NotChecked=146, Total=5700 [2022-07-14 06:05:24,842 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 242 mSDsluCounter, 3475 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 3605 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 928 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:24,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 3605 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1402 Invalid, 0 Unknown, 928 Unchecked, 0.6s Time] [2022-07-14 06:05:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-07-14 06:05:24,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 1539. [2022-07-14 06:05:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1537 states have (on average 1.1164606376057253) internal successors, (1716), 1538 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1716 transitions. [2022-07-14 06:05:24,867 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1716 transitions. Word has length 69 [2022-07-14 06:05:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:24,867 INFO L495 AbstractCegarLoop]: Abstraction has 1539 states and 1716 transitions. [2022-07-14 06:05:24,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0384615384615383) internal successors, (158), 52 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:24,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1716 transitions. [2022-07-14 06:05:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-14 06:05:24,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:24,896 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:24,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:25,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:25,114 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:25,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1335660074, now seen corresponding path program 10 times [2022-07-14 06:05:25,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:25,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206139519] [2022-07-14 06:05:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:25,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:25,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206139519] [2022-07-14 06:05:25,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206139519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:25,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71570939] [2022-07-14 06:05:25,475 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:05:25,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:25,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:25,495 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) [2022-07-14 06:05:25,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-14 06:05:25,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:05:25,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:25,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-14 06:05:25,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:25,641 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:25,642 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 [2022-07-14 06:05:25,847 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 [2022-07-14 06:05:26,444 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:26,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-14 06:05:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:26,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:27,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:27,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:05:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 66 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:28,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71570939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:28,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:28,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 58 [2022-07-14 06:05:28,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248096617] [2022-07-14 06:05:28,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:28,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-14 06:05:28,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:28,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-14 06:05:28,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=3081, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:05:28,099 INFO L87 Difference]: Start difference. First operand 1539 states and 1716 transitions. Second operand has 59 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 59 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:31,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:31,837 INFO L93 Difference]: Finished difference Result 2279 states and 2510 transitions. [2022-07-14 06:05:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-14 06:05:31,838 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 59 states have internal predecessors, (184), 0 states have call successors, (0), 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 70 [2022-07-14 06:05:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:31,842 INFO L225 Difference]: With dead ends: 2279 [2022-07-14 06:05:31,842 INFO L226 Difference]: Without dead ends: 2279 [2022-07-14 06:05:31,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2383, Invalid=11189, Unknown=0, NotChecked=0, Total=13572 [2022-07-14 06:05:31,845 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 780 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:31,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 1717 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2191 Invalid, 0 Unknown, 302 Unchecked, 0.9s Time] [2022-07-14 06:05:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2022-07-14 06:05:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1599. [2022-07-14 06:05:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1599 states, 1597 states have (on average 1.1183469004383217) internal successors, (1786), 1598 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 1786 transitions. [2022-07-14 06:05:31,877 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 1786 transitions. Word has length 70 [2022-07-14 06:05:31,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:31,879 INFO L495 AbstractCegarLoop]: Abstraction has 1599 states and 1786 transitions. [2022-07-14 06:05:31,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 3.1724137931034484) internal successors, (184), 59 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 1786 transitions. [2022-07-14 06:05:31,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 06:05:31,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:31,897 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:31,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:32,114 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,SelfDestructingSolverStorable42 [2022-07-14 06:05:32,114 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:32,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:32,114 INFO L85 PathProgramCache]: Analyzing trace with hash -165610799, now seen corresponding path program 9 times [2022-07-14 06:05:32,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:32,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417728121] [2022-07-14 06:05:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:32,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:32,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:32,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417728121] [2022-07-14 06:05:32,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417728121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:32,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816618379] [2022-07-14 06:05:32,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:05:32,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:32,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:32,332 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:32,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-14 06:05:32,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 06:05:32,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:32,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:05:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:32,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:33,102 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 [2022-07-14 06:05:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 28 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:33,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816618379] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:33,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:33,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 40 [2022-07-14 06:05:33,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314482108] [2022-07-14 06:05:33,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:33,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:05:33,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:33,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:05:33,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:05:33,135 INFO L87 Difference]: Start difference. First operand 1599 states and 1786 transitions. Second operand has 41 states, 40 states have (on average 4.675) internal successors, (187), 41 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:34,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:34,061 INFO L93 Difference]: Finished difference Result 2443 states and 2712 transitions. [2022-07-14 06:05:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:05:34,061 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.675) internal successors, (187), 41 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-14 06:05:34,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:34,066 INFO L225 Difference]: With dead ends: 2443 [2022-07-14 06:05:34,066 INFO L226 Difference]: Without dead ends: 2443 [2022-07-14 06:05:34,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=678, Invalid=2982, Unknown=0, NotChecked=0, Total=3660 [2022-07-14 06:05:34,067 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 479 mSDsluCounter, 1360 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:34,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 1460 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:05:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2022-07-14 06:05:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 1724. [2022-07-14 06:05:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1722 states have (on average 1.1173054587688733) internal successors, (1924), 1723 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 1924 transitions. [2022-07-14 06:05:34,106 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 1924 transitions. Word has length 73 [2022-07-14 06:05:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:34,106 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 1924 transitions. [2022-07-14 06:05:34,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.675) internal successors, (187), 41 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 1924 transitions. [2022-07-14 06:05:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-14 06:05:34,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:34,117 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:34,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:34,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-14 06:05:34,331 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash 439135196, now seen corresponding path program 5 times [2022-07-14 06:05:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:34,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445599274] [2022-07-14 06:05:34,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:34,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 63 proven. 50 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 06:05:34,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:34,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445599274] [2022-07-14 06:05:34,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445599274] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:34,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770207390] [2022-07-14 06:05:34,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:05:34,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:34,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:34,555 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:34,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-14 06:05:34,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-14 06:05:34,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:34,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:05:34,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:34,823 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 16 treesize of output 8 [2022-07-14 06:05:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 63 proven. 50 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 06:05:34,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:34,915 INFO L356 Elim1Store]: treesize reduction 4, result has 69.2 percent of original size [2022-07-14 06:05:34,915 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 17 [2022-07-14 06:05:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 47 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 06:05:34,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770207390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:34,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:34,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 26 [2022-07-14 06:05:34,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784039373] [2022-07-14 06:05:34,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:34,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:05:34,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:34,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:05:34,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:05:34,958 INFO L87 Difference]: Start difference. First operand 1724 states and 1924 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:35,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:35,733 INFO L93 Difference]: Finished difference Result 2135 states and 2340 transitions. [2022-07-14 06:05:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:05:35,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-07-14 06:05:35,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:35,746 INFO L225 Difference]: With dead ends: 2135 [2022-07-14 06:05:35,746 INFO L226 Difference]: Without dead ends: 2135 [2022-07-14 06:05:35,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=380, Invalid=2070, Unknown=0, NotChecked=0, Total=2450 [2022-07-14 06:05:35,747 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 107 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:35,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 596 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:05:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2022-07-14 06:05:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 2054. [2022-07-14 06:05:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2052 states have (on average 1.101364522417154) internal successors, (2260), 2053 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 2260 transitions. [2022-07-14 06:05:35,781 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 2260 transitions. Word has length 73 [2022-07-14 06:05:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:35,782 INFO L495 AbstractCegarLoop]: Abstraction has 2054 states and 2260 transitions. [2022-07-14 06:05:35,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:35,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 2260 transitions. [2022-07-14 06:05:35,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-14 06:05:35,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:35,783 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:35,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:36,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:36,000 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:36,001 INFO L85 PathProgramCache]: Analyzing trace with hash 88870659, now seen corresponding path program 2 times [2022-07-14 06:05:36,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:36,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690688342] [2022-07-14 06:05:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:36,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 71 proven. 30 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-14 06:05:36,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:36,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690688342] [2022-07-14 06:05:36,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690688342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:36,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677231206] [2022-07-14 06:05:36,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:05:36,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:36,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:36,237 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:36,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-14 06:05:36,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:05:36,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:36,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-14 06:05:36,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:36,427 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 6 treesize of output 5 [2022-07-14 06:05:36,543 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 [2022-07-14 06:05:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 71 proven. 43 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-14 06:05:36,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 71 proven. 30 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-14 06:05:36,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677231206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:36,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:36,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 13] total 27 [2022-07-14 06:05:36,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816686664] [2022-07-14 06:05:36,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:36,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:05:36,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:36,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:05:36,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:05:36,695 INFO L87 Difference]: Start difference. First operand 2054 states and 2260 transitions. Second operand has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:37,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:37,516 INFO L93 Difference]: Finished difference Result 2164 states and 2341 transitions. [2022-07-14 06:05:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-14 06:05:37,517 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 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 74 [2022-07-14 06:05:37,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:37,521 INFO L225 Difference]: With dead ends: 2164 [2022-07-14 06:05:37,521 INFO L226 Difference]: Without dead ends: 2060 [2022-07-14 06:05:37,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 138 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=470, Invalid=2610, Unknown=0, NotChecked=0, Total=3080 [2022-07-14 06:05:37,521 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 147 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:37,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 450 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:05:37,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-07-14 06:05:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1713. [2022-07-14 06:05:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1711 states have (on average 1.09760374050263) internal successors, (1878), 1712 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:37,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 1878 transitions. [2022-07-14 06:05:37,555 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 1878 transitions. Word has length 74 [2022-07-14 06:05:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:37,555 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 1878 transitions. [2022-07-14 06:05:37,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 1878 transitions. [2022-07-14 06:05:37,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-14 06:05:37,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:37,557 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:37,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:37,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:37,772 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:37,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1207961453, now seen corresponding path program 3 times [2022-07-14 06:05:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:37,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644878080] [2022-07-14 06:05:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:37,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 75 proven. 76 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-14 06:05:38,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:38,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644878080] [2022-07-14 06:05:38,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644878080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:38,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048618024] [2022-07-14 06:05:38,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:05:38,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:38,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:38,096 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:38,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-14 06:05:38,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 06:05:38,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:38,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-14 06:05:38,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:38,420 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 [2022-07-14 06:05:38,732 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 [2022-07-14 06:05:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 153 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 06:05:38,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:38,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:05:38,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:05:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 16 proven. 153 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-14 06:05:39,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048618024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:39,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:39,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 41 [2022-07-14 06:05:39,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445639295] [2022-07-14 06:05:39,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:39,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:05:39,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:39,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:05:39,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1526, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:05:39,002 INFO L87 Difference]: Start difference. First operand 1713 states and 1878 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:44,458 INFO L93 Difference]: Finished difference Result 3261 states and 3439 transitions. [2022-07-14 06:05:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-07-14 06:05:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-07-14 06:05:44,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:44,477 INFO L225 Difference]: With dead ends: 3261 [2022-07-14 06:05:44,477 INFO L226 Difference]: Without dead ends: 2792 [2022-07-14 06:05:44,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 17847 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2398, Invalid=44908, Unknown=0, NotChecked=0, Total=47306 [2022-07-14 06:05:44,489 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 748 mSDsluCounter, 2896 mSDsCounter, 0 mSdLazyCounter, 3384 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 4484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 3384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 931 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:44,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 3037 Invalid, 4484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 3384 Invalid, 0 Unknown, 931 Unchecked, 1.2s Time] [2022-07-14 06:05:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2022-07-14 06:05:44,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 1749. [2022-07-14 06:05:44,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1747 states have (on average 1.090440755580996) internal successors, (1905), 1748 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 1905 transitions. [2022-07-14 06:05:44,527 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 1905 transitions. Word has length 79 [2022-07-14 06:05:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:44,527 INFO L495 AbstractCegarLoop]: Abstraction has 1749 states and 1905 transitions. [2022-07-14 06:05:44,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 1905 transitions. [2022-07-14 06:05:44,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-14 06:05:44,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:44,529 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:44,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:44,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:44,731 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:44,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1453943126, now seen corresponding path program 11 times [2022-07-14 06:05:44,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:44,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396723847] [2022-07-14 06:05:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:44,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:44,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 136 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:45,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:45,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396723847] [2022-07-14 06:05:45,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396723847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:45,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033664388] [2022-07-14 06:05:45,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:05:45,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:45,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:45,056 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:45,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-14 06:05:45,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-14 06:05:45,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:45,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-14 06:05:45,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:45,228 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:45,229 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 [2022-07-14 06:05:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 149 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:46,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:46,665 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 149 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:46,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033664388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:46,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:46,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 52 [2022-07-14 06:05:46,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961113210] [2022-07-14 06:05:46,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:46,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 06:05:46,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 06:05:46,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2278, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 06:05:46,666 INFO L87 Difference]: Start difference. First operand 1749 states and 1905 transitions. Second operand has 52 states, 52 states have (on average 3.5961538461538463) internal successors, (187), 52 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:05:48,822 INFO L93 Difference]: Finished difference Result 3770 states and 3998 transitions. [2022-07-14 06:05:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-14 06:05:48,823 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.5961538461538463) internal successors, (187), 52 states have internal predecessors, (187), 0 states have call successors, (0), 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 [2022-07-14 06:05:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:05:48,827 INFO L225 Difference]: With dead ends: 3770 [2022-07-14 06:05:48,827 INFO L226 Difference]: Without dead ends: 3717 [2022-07-14 06:05:48,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3058, Invalid=10282, Unknown=0, NotChecked=0, Total=13340 [2022-07-14 06:05:48,830 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 1167 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:05:48,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1167 Valid, 879 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:05:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3717 states. [2022-07-14 06:05:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3717 to 2319. [2022-07-14 06:05:48,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2317 states have (on average 1.1027190332326284) internal successors, (2555), 2318 states have internal predecessors, (2555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 2555 transitions. [2022-07-14 06:05:48,850 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 2555 transitions. Word has length 80 [2022-07-14 06:05:48,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:05:48,850 INFO L495 AbstractCegarLoop]: Abstraction has 2319 states and 2555 transitions. [2022-07-14 06:05:48,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.5961538461538463) internal successors, (187), 52 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:05:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 2555 transitions. [2022-07-14 06:05:48,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-14 06:05:48,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:05:48,852 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:05:48,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-14 06:05:49,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-14 06:05:49,053 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:05:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:05:49,053 INFO L85 PathProgramCache]: Analyzing trace with hash 635370141, now seen corresponding path program 10 times [2022-07-14 06:05:49,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:05:49,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235001552] [2022-07-14 06:05:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:05:49,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:05:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:05:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 12 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:49,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:05:49,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235001552] [2022-07-14 06:05:49,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235001552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:05:49,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611956005] [2022-07-14 06:05:49,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:05:49,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:05:49,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:05:49,704 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:05:49,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-14 06:05:49,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:05:49,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:05:49,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-14 06:05:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:05:49,911 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:49,911 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 [2022-07-14 06:05:50,317 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 [2022-07-14 06:05:50,376 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:05:50,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-14 06:05:50,401 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 [2022-07-14 06:05:54,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:05:54,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-14 06:05:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 94 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:54,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:05:55,557 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:55,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-14 06:05:55,562 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:05:55,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-14 06:05:55,565 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-14 06:05:56,368 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:05:56,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611956005] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:05:56,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:05:56,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24, 24] total 65 [2022-07-14 06:05:56,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058423965] [2022-07-14 06:05:56,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:05:56,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-14 06:05:56,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:05:56,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-14 06:05:56,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=3870, Unknown=9, NotChecked=0, Total=4160 [2022-07-14 06:05:56,370 INFO L87 Difference]: Start difference. First operand 2319 states and 2555 transitions. Second operand has 65 states, 65 states have (on average 3.4) internal successors, (221), 65 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:00,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:00,392 INFO L93 Difference]: Finished difference Result 4842 states and 5320 transitions. [2022-07-14 06:06:00,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-14 06:06:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4) internal successors, (221), 65 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-14 06:06:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:00,397 INFO L225 Difference]: With dead ends: 4842 [2022-07-14 06:06:00,398 INFO L226 Difference]: Without dead ends: 4231 [2022-07-14 06:06:00,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1093, Invalid=16720, Unknown=9, NotChecked=0, Total=17822 [2022-07-14 06:06:00,399 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 450 mSDsluCounter, 2721 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 965 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:00,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 2798 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1146 Invalid, 0 Unknown, 965 Unchecked, 0.4s Time] [2022-07-14 06:06:00,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2022-07-14 06:06:00,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 3325. [2022-07-14 06:06:00,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3325 states, 3323 states have (on average 1.1065302437556426) internal successors, (3677), 3324 states have internal predecessors, (3677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3325 states to 3325 states and 3677 transitions. [2022-07-14 06:06:00,473 INFO L78 Accepts]: Start accepts. Automaton has 3325 states and 3677 transitions. Word has length 81 [2022-07-14 06:06:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:00,473 INFO L495 AbstractCegarLoop]: Abstraction has 3325 states and 3677 transitions. [2022-07-14 06:06:00,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4) internal successors, (221), 65 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3325 states and 3677 transitions. [2022-07-14 06:06:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-14 06:06:00,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:00,476 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:00,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:00,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-14 06:06:00,688 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:00,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1147439476, now seen corresponding path program 6 times [2022-07-14 06:06:00,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:00,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633346091] [2022-07-14 06:06:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:00,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 6 proven. 152 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-14 06:06:00,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:00,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633346091] [2022-07-14 06:06:00,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633346091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:00,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063236979] [2022-07-14 06:06:00,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:06:00,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:00,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:00,930 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:00,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-14 06:06:01,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 06:06:01,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:01,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 155 conjunts are in the unsatisfiable core [2022-07-14 06:06:01,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:01,075 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:06:01,075 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 [2022-07-14 06:06:01,319 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 [2022-07-14 06:06:01,382 INFO L356 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2022-07-14 06:06:01,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-14 06:06:02,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:02,505 INFO L356 Elim1Store]: treesize reduction 58, result has 24.7 percent of original size [2022-07-14 06:06:02,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 31 [2022-07-14 06:06:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 2 proven. 192 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:06:02,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:05,492 INFO L356 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2022-07-14 06:06:05,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 100 [2022-07-14 06:06:05,500 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:05,501 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 50 treesize of output 50 [2022-07-14 06:06:05,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:05,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 8 [2022-07-14 06:06:05,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:05,560 INFO L356 Elim1Store]: treesize reduction 9, result has 84.2 percent of original size [2022-07-14 06:06:05,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 100 [2022-07-14 06:06:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 12 proven. 180 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:06:08,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063236979] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:08,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:08,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 34, 35] total 83 [2022-07-14 06:06:08,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143216584] [2022-07-14 06:06:08,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:08,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-14 06:06:08,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:08,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-14 06:06:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=6124, Unknown=0, NotChecked=0, Total=6806 [2022-07-14 06:06:08,844 INFO L87 Difference]: Start difference. First operand 3325 states and 3677 transitions. Second operand has 83 states, 83 states have (on average 2.3373493975903616) internal successors, (194), 83 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:18,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:18,049 INFO L93 Difference]: Finished difference Result 3414 states and 3704 transitions. [2022-07-14 06:06:18,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-07-14 06:06:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3373493975903616) internal successors, (194), 83 states have internal predecessors, (194), 0 states have call successors, (0), 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 83 [2022-07-14 06:06:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:18,063 INFO L225 Difference]: With dead ends: 3414 [2022-07-14 06:06:18,063 INFO L226 Difference]: Without dead ends: 3159 [2022-07-14 06:06:18,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8778 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=3263, Invalid=33409, Unknown=0, NotChecked=0, Total=36672 [2022-07-14 06:06:18,065 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 636 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 5030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2852 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:18,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 1693 Invalid, 5030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 2028 Invalid, 0 Unknown, 2852 Unchecked, 1.0s Time] [2022-07-14 06:06:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2022-07-14 06:06:18,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 2559. [2022-07-14 06:06:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2557 states have (on average 1.100117324990223) internal successors, (2813), 2558 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 2813 transitions. [2022-07-14 06:06:18,083 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 2813 transitions. Word has length 83 [2022-07-14 06:06:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:18,083 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 2813 transitions. [2022-07-14 06:06:18,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3373493975903616) internal successors, (194), 83 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 2813 transitions. [2022-07-14 06:06:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-14 06:06:18,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:18,085 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:18,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:18,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-14 06:06:18,302 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:18,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1806603827, now seen corresponding path program 12 times [2022-07-14 06:06:18,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:18,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802049522] [2022-07-14 06:06:18,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:18,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:18,611 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:18,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:18,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802049522] [2022-07-14 06:06:18,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802049522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:18,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695246550] [2022-07-14 06:06:18,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:06:18,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:18,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:18,612 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:18,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-14 06:06:18,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-14 06:06:18,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:18,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-14 06:06:18,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:19,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:06:19,146 INFO L356 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2022-07-14 06:06:19,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-07-14 06:06:19,986 INFO L356 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2022-07-14 06:06:19,986 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 25 treesize of output 13 [2022-07-14 06:06:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:19,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:20,469 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |c_ULTIMATE.start_main_~length2~0#1|) 0) (+ |ULTIMATE.start_main_~nondetString2~0#1.offset| 7)) 0)) is different from false [2022-07-14 06:06:20,473 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:20,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-14 06:06:20,478 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:20,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2022-07-14 06:06:20,483 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:20,492 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:20,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2022-07-14 06:06:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 16 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:20,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695246550] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:20,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:20,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30, 26] total 67 [2022-07-14 06:06:20,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326762298] [2022-07-14 06:06:20,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:20,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-14 06:06:20,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:20,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-14 06:06:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=4077, Unknown=1, NotChecked=128, Total=4422 [2022-07-14 06:06:20,766 INFO L87 Difference]: Start difference. First operand 2559 states and 2813 transitions. Second operand has 67 states, 67 states have (on average 3.0) internal successors, (201), 67 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:23,197 INFO L93 Difference]: Finished difference Result 4780 states and 5113 transitions. [2022-07-14 06:06:23,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-14 06:06:23,198 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.0) internal successors, (201), 67 states have internal predecessors, (201), 0 states have call successors, (0), 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 [2022-07-14 06:06:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:23,203 INFO L225 Difference]: With dead ends: 4780 [2022-07-14 06:06:23,203 INFO L226 Difference]: Without dead ends: 4689 [2022-07-14 06:06:23,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3648 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=710, Invalid=13573, Unknown=1, NotChecked=236, Total=14520 [2022-07-14 06:06:23,204 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 462 mSDsluCounter, 5286 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 5466 SdHoareTripleChecker+Invalid, 3951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1188 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:23,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 5466 Invalid, 3951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2689 Invalid, 0 Unknown, 1188 Unchecked, 0.6s Time] [2022-07-14 06:06:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4689 states. [2022-07-14 06:06:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4689 to 2863. [2022-07-14 06:06:23,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2861 states have (on average 1.1010136315973436) internal successors, (3150), 2862 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:23,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 3150 transitions. [2022-07-14 06:06:23,246 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 3150 transitions. Word has length 84 [2022-07-14 06:06:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:23,247 INFO L495 AbstractCegarLoop]: Abstraction has 2863 states and 3150 transitions. [2022-07-14 06:06:23,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.0) internal successors, (201), 67 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:23,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 3150 transitions. [2022-07-14 06:06:23,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-14 06:06:23,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:23,249 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:23,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:23,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-07-14 06:06:23,466 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:23,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash -738556896, now seen corresponding path program 11 times [2022-07-14 06:06:23,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:23,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21322729] [2022-07-14 06:06:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:23,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 28 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:23,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:23,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21322729] [2022-07-14 06:06:23,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21322729] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:23,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35584212] [2022-07-14 06:06:23,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:06:23,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:23,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:23,673 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:23,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-14 06:06:23,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-14 06:06:23,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:23,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-14 06:06:23,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:24,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:24,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2022-07-14 06:06:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 45 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:24,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35584212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:24,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:24,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 43 [2022-07-14 06:06:24,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980350413] [2022-07-14 06:06:24,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:24,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 06:06:24,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:24,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 06:06:24,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1653, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 06:06:24,606 INFO L87 Difference]: Start difference. First operand 2863 states and 3150 transitions. Second operand has 44 states, 43 states have (on average 4.627906976744186) internal successors, (199), 44 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:25,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:25,506 INFO L93 Difference]: Finished difference Result 4159 states and 4549 transitions. [2022-07-14 06:06:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:06:25,507 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.627906976744186) internal successors, (199), 44 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2022-07-14 06:06:25,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:25,511 INFO L225 Difference]: With dead ends: 4159 [2022-07-14 06:06:25,511 INFO L226 Difference]: Without dead ends: 4159 [2022-07-14 06:06:25,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=904, Invalid=3518, Unknown=0, NotChecked=0, Total=4422 [2022-07-14 06:06:25,512 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 564 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1871 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:25,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1871 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:06:25,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2022-07-14 06:06:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3054. [2022-07-14 06:06:25,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3052 states have (on average 1.1005897771952817) internal successors, (3359), 3053 states have internal predecessors, (3359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 3359 transitions. [2022-07-14 06:06:25,533 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 3359 transitions. Word has length 85 [2022-07-14 06:06:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:25,533 INFO L495 AbstractCegarLoop]: Abstraction has 3054 states and 3359 transitions. [2022-07-14 06:06:25,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.627906976744186) internal successors, (199), 44 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 3359 transitions. [2022-07-14 06:06:25,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-14 06:06:25,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:25,535 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:25,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-14 06:06:25,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:25,752 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:25,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash -295170928, now seen corresponding path program 13 times [2022-07-14 06:06:25,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:25,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865225222] [2022-07-14 06:06:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:25,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:26,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:26,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865225222] [2022-07-14 06:06:26,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865225222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:26,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853245846] [2022-07-14 06:06:26,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:06:26,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:26,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:26,137 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:26,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-14 06:06:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:26,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-14 06:06:26,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:26,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:26,977 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 [2022-07-14 06:06:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 91 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:27,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853245846] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:27,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:27,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2022-07-14 06:06:27,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31728828] [2022-07-14 06:06:27,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:27,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 06:06:27,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:27,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 06:06:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2285, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 06:06:27,043 INFO L87 Difference]: Start difference. First operand 3054 states and 3359 transitions. Second operand has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:28,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:28,527 INFO L93 Difference]: Finished difference Result 5511 states and 5907 transitions. [2022-07-14 06:06:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-14 06:06:28,527 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 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 88 [2022-07-14 06:06:28,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:28,532 INFO L225 Difference]: With dead ends: 5511 [2022-07-14 06:06:28,533 INFO L226 Difference]: Without dead ends: 5511 [2022-07-14 06:06:28,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1167, Invalid=5153, Unknown=0, NotChecked=0, Total=6320 [2022-07-14 06:06:28,533 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 764 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 2353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:28,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 1617 Invalid, 2353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-14 06:06:28,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2022-07-14 06:06:28,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 3439. [2022-07-14 06:06:28,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3437 states have (on average 1.1088158277567646) internal successors, (3811), 3438 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 3811 transitions. [2022-07-14 06:06:28,591 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 3811 transitions. Word has length 88 [2022-07-14 06:06:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:28,591 INFO L495 AbstractCegarLoop]: Abstraction has 3439 states and 3811 transitions. [2022-07-14 06:06:28,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.58) internal successors, (179), 51 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:28,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 3811 transitions. [2022-07-14 06:06:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-14 06:06:28,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:28,593 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:28,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:28,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-07-14 06:06:28,810 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:28,811 INFO L85 PathProgramCache]: Analyzing trace with hash -318093152, now seen corresponding path program 4 times [2022-07-14 06:06:28,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:28,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140775918] [2022-07-14 06:06:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:28,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 15 proven. 198 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-14 06:06:29,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:29,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140775918] [2022-07-14 06:06:29,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140775918] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:29,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813761742] [2022-07-14 06:06:29,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:06:29,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:29,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:29,063 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:29,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-14 06:06:29,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:06:29,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 78 conjunts are in the unsatisfiable core [2022-07-14 06:06:29,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:29,276 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:06:29,276 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 [2022-07-14 06:06:29,519 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 [2022-07-14 06:06:29,985 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:29,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-14 06:06:30,128 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 32 proven. 181 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-14 06:06:30,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:30,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:30,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:31,594 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 45 proven. 168 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-14 06:06:31,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813761742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:31,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:31,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 57 [2022-07-14 06:06:31,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554050475] [2022-07-14 06:06:31,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:31,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-14 06:06:31,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:31,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-14 06:06:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3000, Unknown=0, NotChecked=0, Total=3306 [2022-07-14 06:06:31,596 INFO L87 Difference]: Start difference. First operand 3439 states and 3811 transitions. Second operand has 58 states, 57 states have (on average 3.6491228070175437) internal successors, (208), 58 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:34,959 INFO L93 Difference]: Finished difference Result 4805 states and 5171 transitions. [2022-07-14 06:06:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-14 06:06:34,960 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.6491228070175437) internal successors, (208), 58 states have internal predecessors, (208), 0 states have call successors, (0), 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 88 [2022-07-14 06:06:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:34,964 INFO L225 Difference]: With dead ends: 4805 [2022-07-14 06:06:34,964 INFO L226 Difference]: Without dead ends: 4445 [2022-07-14 06:06:34,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2146, Invalid=9410, Unknown=0, NotChecked=0, Total=11556 [2022-07-14 06:06:34,972 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 791 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:34,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1582 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2068 Invalid, 0 Unknown, 155 Unchecked, 0.8s Time] [2022-07-14 06:06:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4445 states. [2022-07-14 06:06:35,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4445 to 3214. [2022-07-14 06:06:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 3212 states have (on average 1.1055417185554173) internal successors, (3551), 3213 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:35,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 3551 transitions. [2022-07-14 06:06:35,034 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 3551 transitions. Word has length 88 [2022-07-14 06:06:35,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:35,034 INFO L495 AbstractCegarLoop]: Abstraction has 3214 states and 3551 transitions. [2022-07-14 06:06:35,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.6491228070175437) internal successors, (208), 58 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:35,034 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 3551 transitions. [2022-07-14 06:06:35,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-14 06:06:35,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:35,075 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:35,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:35,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:35,285 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:35,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1131628520, now seen corresponding path program 14 times [2022-07-14 06:06:35,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:35,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128953222] [2022-07-14 06:06:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:35,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:35,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:35,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128953222] [2022-07-14 06:06:35,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128953222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:35,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302703214] [2022-07-14 06:06:35,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:06:35,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:35,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:35,806 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:35,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-14 06:06:35,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:06:35,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:35,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 110 conjunts are in the unsatisfiable core [2022-07-14 06:06:35,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:36,165 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 [2022-07-14 06:06:36,333 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 [2022-07-14 06:06:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:36,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:36,452 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:36,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 18 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:36,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302703214] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:36,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:36,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 48 [2022-07-14 06:06:36,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344058782] [2022-07-14 06:06:36,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:36,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-14 06:06:36,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:36,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-14 06:06:36,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 06:06:36,652 INFO L87 Difference]: Start difference. First operand 3214 states and 3551 transitions. Second operand has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:38,979 INFO L93 Difference]: Finished difference Result 6061 states and 6485 transitions. [2022-07-14 06:06:39,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-14 06:06:39,007 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2022-07-14 06:06:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:39,013 INFO L225 Difference]: With dead ends: 6061 [2022-07-14 06:06:39,013 INFO L226 Difference]: Without dead ends: 5650 [2022-07-14 06:06:39,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 170 SyntacticMatches, 6 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=851, Invalid=7705, Unknown=0, NotChecked=0, Total=8556 [2022-07-14 06:06:39,015 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 873 mSDsluCounter, 4515 mSDsCounter, 0 mSdLazyCounter, 3445 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 4725 SdHoareTripleChecker+Invalid, 3824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:39,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [873 Valid, 4725 Invalid, 3824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3445 Invalid, 0 Unknown, 266 Unchecked, 1.1s Time] [2022-07-14 06:06:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5650 states. [2022-07-14 06:06:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5650 to 3583. [2022-07-14 06:06:39,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3581 states have (on average 1.107511868193242) internal successors, (3966), 3582 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 3966 transitions. [2022-07-14 06:06:39,086 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 3966 transitions. Word has length 93 [2022-07-14 06:06:39,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:39,087 INFO L495 AbstractCegarLoop]: Abstraction has 3583 states and 3966 transitions. [2022-07-14 06:06:39,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.0833333333333335) internal successors, (148), 48 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 3966 transitions. [2022-07-14 06:06:39,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-14 06:06:39,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:39,089 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:39,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:39,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:39,306 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:39,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2067645676, now seen corresponding path program 12 times [2022-07-14 06:06:39,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:39,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983581442] [2022-07-14 06:06:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:39,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:39,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983581442] [2022-07-14 06:06:39,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983581442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:39,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31623436] [2022-07-14 06:06:39,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:06:39,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:39,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:39,970 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:39,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-14 06:06:40,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-14 06:06:40,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:40,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-14 06:06:40,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:40,145 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 [2022-07-14 06:06:40,434 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 [2022-07-14 06:06:40,479 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 [2022-07-14 06:06:41,074 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-14 06:06:41,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-14 06:06:41,085 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:41,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:41,209 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1461 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1461) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:06:41,213 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:41,213 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 [2022-07-14 06:06:41,223 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:41,223 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 [2022-07-14 06:06:41,225 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 [2022-07-14 06:06:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 14 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:41,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31623436] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:41,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:41,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 24] total 52 [2022-07-14 06:06:41,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288412616] [2022-07-14 06:06:41,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 06:06:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:41,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 06:06:41,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2423, Unknown=1, NotChecked=98, Total=2652 [2022-07-14 06:06:41,503 INFO L87 Difference]: Start difference. First operand 3583 states and 3966 transitions. Second operand has 52 states, 52 states have (on average 3.6346153846153846) internal successors, (189), 52 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:42,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:42,460 INFO L93 Difference]: Finished difference Result 5784 states and 6368 transitions. [2022-07-14 06:06:42,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-14 06:06:42,461 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.6346153846153846) internal successors, (189), 52 states have internal predecessors, (189), 0 states have call successors, (0), 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 93 [2022-07-14 06:06:42,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:42,464 INFO L225 Difference]: With dead ends: 5784 [2022-07-14 06:06:42,464 INFO L226 Difference]: Without dead ends: 4564 [2022-07-14 06:06:42,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 159 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=282, Invalid=5420, Unknown=2, NotChecked=148, Total=5852 [2022-07-14 06:06:42,465 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 195 mSDsluCounter, 3766 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 3864 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:42,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 3864 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1619 Invalid, 0 Unknown, 345 Unchecked, 0.4s Time] [2022-07-14 06:06:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2022-07-14 06:06:42,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 3847. [2022-07-14 06:06:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3847 states, 3845 states have (on average 1.107152145643693) internal successors, (4257), 3846 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3847 states to 3847 states and 4257 transitions. [2022-07-14 06:06:42,498 INFO L78 Accepts]: Start accepts. Automaton has 3847 states and 4257 transitions. Word has length 93 [2022-07-14 06:06:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:42,498 INFO L495 AbstractCegarLoop]: Abstraction has 3847 states and 4257 transitions. [2022-07-14 06:06:42,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.6346153846153846) internal successors, (189), 52 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 3847 states and 4257 transitions. [2022-07-14 06:06:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-14 06:06:42,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:42,501 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:42,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:42,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-14 06:06:42,715 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:42,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1504487979, now seen corresponding path program 15 times [2022-07-14 06:06:42,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:42,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429342719] [2022-07-14 06:06:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:42,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 91 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:43,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429342719] [2022-07-14 06:06:43,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429342719] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:43,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139626405] [2022-07-14 06:06:43,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:06:43,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:43,092 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:43,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-14 06:06:43,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-14 06:06:43,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:43,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-14 06:06:43,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:43,291 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:06:43,291 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 [2022-07-14 06:06:43,395 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 [2022-07-14 06:06:43,843 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:43,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2022-07-14 06:06:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-14 06:06:43,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:44,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:06:44,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:06:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-14 06:06:44,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139626405] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:44,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:44,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10, 10] total 44 [2022-07-14 06:06:44,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357817702] [2022-07-14 06:06:44,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:44,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-14 06:06:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-14 06:06:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2022-07-14 06:06:44,618 INFO L87 Difference]: Start difference. First operand 3847 states and 4257 transitions. Second operand has 45 states, 44 states have (on average 3.3863636363636362) internal successors, (149), 45 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) [2022-07-14 06:06:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:45,735 INFO L93 Difference]: Finished difference Result 4187 states and 4632 transitions. [2022-07-14 06:06:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-14 06:06:45,735 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.3863636363636362) internal successors, (149), 45 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 97 [2022-07-14 06:06:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:45,738 INFO L225 Difference]: With dead ends: 4187 [2022-07-14 06:06:45,738 INFO L226 Difference]: Without dead ends: 4088 [2022-07-14 06:06:45,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=784, Invalid=5696, Unknown=0, NotChecked=0, Total=6480 [2022-07-14 06:06:45,739 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 68 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:45,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 491 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 770 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-07-14 06:06:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2022-07-14 06:06:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3864. [2022-07-14 06:06:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3864 states, 3862 states have (on average 1.104091144484723) internal successors, (4264), 3863 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 4264 transitions. [2022-07-14 06:06:45,762 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 4264 transitions. Word has length 97 [2022-07-14 06:06:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:45,762 INFO L495 AbstractCegarLoop]: Abstraction has 3864 states and 4264 transitions. [2022-07-14 06:06:45,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.3863636363636362) internal successors, (149), 45 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) [2022-07-14 06:06:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 4264 transitions. [2022-07-14 06:06:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-14 06:06:45,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:45,765 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:45,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:45,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-14 06:06:45,984 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:45,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:45,984 INFO L85 PathProgramCache]: Analyzing trace with hash 73409007, now seen corresponding path program 13 times [2022-07-14 06:06:45,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:45,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386628045] [2022-07-14 06:06:45,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:45,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:46,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:46,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386628045] [2022-07-14 06:06:46,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386628045] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:46,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440398090] [2022-07-14 06:06:46,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:06:46,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:46,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:46,260 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:46,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-14 06:06:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:46,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-14 06:06:46,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:46,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:46,934 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 [2022-07-14 06:06:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:46,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440398090] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:46,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:46,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 42 [2022-07-14 06:06:46,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313075858] [2022-07-14 06:06:46,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 06:06:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:46,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 06:06:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1602, Unknown=0, NotChecked=0, Total=1806 [2022-07-14 06:06:46,964 INFO L87 Difference]: Start difference. First operand 3864 states and 4264 transitions. Second operand has 43 states, 42 states have (on average 4.642857142857143) internal successors, (195), 43 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:48,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:48,032 INFO L93 Difference]: Finished difference Result 5944 states and 6528 transitions. [2022-07-14 06:06:48,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 06:06:48,033 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.642857142857143) internal successors, (195), 43 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2022-07-14 06:06:48,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:48,037 INFO L225 Difference]: With dead ends: 5944 [2022-07-14 06:06:48,037 INFO L226 Difference]: Without dead ends: 5944 [2022-07-14 06:06:48,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=861, Invalid=3695, Unknown=0, NotChecked=0, Total=4556 [2022-07-14 06:06:48,037 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 691 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1587 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 1963 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:48,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [691 Valid, 1963 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1587 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:06:48,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2022-07-14 06:06:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 4163. [2022-07-14 06:06:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4163 states, 4161 states have (on average 1.1040615236721942) internal successors, (4594), 4162 states have internal predecessors, (4594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4163 states to 4163 states and 4594 transitions. [2022-07-14 06:06:48,067 INFO L78 Accepts]: Start accepts. Automaton has 4163 states and 4594 transitions. Word has length 97 [2022-07-14 06:06:48,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:48,068 INFO L495 AbstractCegarLoop]: Abstraction has 4163 states and 4594 transitions. [2022-07-14 06:06:48,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.642857142857143) internal successors, (195), 43 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4163 states and 4594 transitions. [2022-07-14 06:06:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-14 06:06:48,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:48,070 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:48,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:48,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-14 06:06:48,286 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:48,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:48,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1160729539, now seen corresponding path program 5 times [2022-07-14 06:06:48,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:48,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990272348] [2022-07-14 06:06:48,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:48,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:48,545 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 139 proven. 200 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:06:48,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:48,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990272348] [2022-07-14 06:06:48,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990272348] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:48,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645983501] [2022-07-14 06:06:48,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:06:48,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:48,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:48,547 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:48,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-14 06:06:48,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-14 06:06:48,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:48,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 94 conjunts are in the unsatisfiable core [2022-07-14 06:06:48,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:48,748 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 6 treesize of output 5 [2022-07-14 06:06:48,952 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 [2022-07-14 06:06:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 139 proven. 191 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-14 06:06:48,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 139 proven. 140 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-14 06:06:49,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645983501] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:49,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:49,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 17] total 44 [2022-07-14 06:06:49,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275280483] [2022-07-14 06:06:49,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:49,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 06:06:49,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:49,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 06:06:49,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 06:06:49,172 INFO L87 Difference]: Start difference. First operand 4163 states and 4594 transitions. Second operand has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:52,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:06:52,526 INFO L93 Difference]: Finished difference Result 6637 states and 7115 transitions. [2022-07-14 06:06:52,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-07-14 06:06:52,527 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 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 102 [2022-07-14 06:06:52,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:06:52,530 INFO L225 Difference]: With dead ends: 6637 [2022-07-14 06:06:52,531 INFO L226 Difference]: Without dead ends: 6223 [2022-07-14 06:06:52,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4485 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1667, Invalid=16693, Unknown=0, NotChecked=0, Total=18360 [2022-07-14 06:06:52,533 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 445 mSDsluCounter, 2607 mSDsCounter, 0 mSdLazyCounter, 3470 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 2732 SdHoareTripleChecker+Invalid, 3563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:06:52,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 2732 Invalid, 3563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3470 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-14 06:06:52,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6223 states. [2022-07-14 06:06:52,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6223 to 4198. [2022-07-14 06:06:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4198 states, 4196 states have (on average 1.0969971401334604) internal successors, (4603), 4197 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 4603 transitions. [2022-07-14 06:06:52,570 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 4603 transitions. Word has length 102 [2022-07-14 06:06:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:06:52,571 INFO L495 AbstractCegarLoop]: Abstraction has 4198 states and 4603 transitions. [2022-07-14 06:06:52,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.727272727272727) internal successors, (164), 44 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:06:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 4603 transitions. [2022-07-14 06:06:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-14 06:06:52,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:06:52,574 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:06:52,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-14 06:06:52,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-14 06:06:52,790 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:06:52,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:06:52,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1376527291, now seen corresponding path program 14 times [2022-07-14 06:06:52,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:06:52,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336537528] [2022-07-14 06:06:52,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:06:52,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:06:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:06:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 16 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:53,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:06:53,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336537528] [2022-07-14 06:06:53,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336537528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:06:53,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687499639] [2022-07-14 06:06:53,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:06:53,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:06:53,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:06:53,442 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:06:53,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-14 06:06:53,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:06:53,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:06:53,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 114 conjunts are in the unsatisfiable core [2022-07-14 06:06:53,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:06:53,636 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:06:53,636 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 [2022-07-14 06:06:53,642 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 [2022-07-14 06:06:54,037 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 [2022-07-14 06:06:54,077 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 [2022-07-14 06:06:54,717 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:54,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-07-14 06:06:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 66 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:54,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:06:56,021 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:56,021 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 [2022-07-14 06:06:56,027 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:06:56,027 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 37 treesize of output 37 [2022-07-14 06:06:56,030 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 [2022-07-14 06:06:57,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:57,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:06:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 91 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:06:57,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687499639] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:06:57,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:06:57,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 26] total 81 [2022-07-14 06:06:57,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208586307] [2022-07-14 06:06:57,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:06:57,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-14 06:06:57,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:06:57,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-14 06:06:57,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=6049, Unknown=8, NotChecked=0, Total=6480 [2022-07-14 06:06:57,170 INFO L87 Difference]: Start difference. First operand 4198 states and 4603 transitions. Second operand has 81 states, 81 states have (on average 3.7901234567901234) internal successors, (307), 81 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:09,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:09,392 INFO L93 Difference]: Finished difference Result 10881 states and 11876 transitions. [2022-07-14 06:07:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-07-14 06:07:09,392 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.7901234567901234) internal successors, (307), 81 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2022-07-14 06:07:09,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:09,399 INFO L225 Difference]: With dead ends: 10881 [2022-07-14 06:07:09,399 INFO L226 Difference]: Without dead ends: 9490 [2022-07-14 06:07:09,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 175 SyntacticMatches, 5 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10925 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=5524, Invalid=41773, Unknown=9, NotChecked=0, Total=47306 [2022-07-14 06:07:09,416 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 2043 mSDsluCounter, 6556 mSDsCounter, 0 mSdLazyCounter, 6208 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 6708 SdHoareTripleChecker+Invalid, 6934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 6208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:09,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2043 Valid, 6708 Invalid, 6934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 6208 Invalid, 0 Unknown, 384 Unchecked, 2.3s Time] [2022-07-14 06:07:09,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9490 states. [2022-07-14 06:07:09,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9490 to 6882. [2022-07-14 06:07:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6882 states, 6880 states have (on average 1.098546511627907) internal successors, (7558), 6881 states have internal predecessors, (7558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:09,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6882 states to 6882 states and 7558 transitions. [2022-07-14 06:07:09,558 INFO L78 Accepts]: Start accepts. Automaton has 6882 states and 7558 transitions. Word has length 105 [2022-07-14 06:07:09,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:09,559 INFO L495 AbstractCegarLoop]: Abstraction has 6882 states and 7558 transitions. [2022-07-14 06:07:09,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.7901234567901234) internal successors, (307), 81 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:09,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6882 states and 7558 transitions. [2022-07-14 06:07:09,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-14 06:07:09,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:09,561 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:09,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:09,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:09,772 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:07:09,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:09,772 INFO L85 PathProgramCache]: Analyzing trace with hash -156704653, now seen corresponding path program 6 times [2022-07-14 06:07:09,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:09,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560702344] [2022-07-14 06:07:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:09,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 123 proven. 290 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 06:07:10,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:10,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560702344] [2022-07-14 06:07:10,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560702344] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:10,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121201734] [2022-07-14 06:07:10,147 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:07:10,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:10,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:10,152 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:10,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-14 06:07:10,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-14 06:07:10,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:10,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 90 conjunts are in the unsatisfiable core [2022-07-14 06:07:10,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:10,557 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 [2022-07-14 06:07:10,896 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 [2022-07-14 06:07:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 24 proven. 346 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-14 06:07:10,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:11,080 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:07:11,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:07:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 24 proven. 346 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-14 06:07:11,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121201734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:11,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:11,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 49 [2022-07-14 06:07:11,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286444297] [2022-07-14 06:07:11,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:11,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 06:07:11,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 06:07:11,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2215, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:07:11,227 INFO L87 Difference]: Start difference. First operand 6882 states and 7558 transitions. Second operand has 49 states, 49 states have (on average 3.795918367346939) internal successors, (186), 49 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:19,284 INFO L93 Difference]: Finished difference Result 16875 states and 17795 transitions. [2022-07-14 06:07:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-07-14 06:07:19,284 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.795918367346939) internal successors, (186), 49 states have internal predecessors, (186), 0 states have call successors, (0), 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 107 [2022-07-14 06:07:19,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:19,295 INFO L225 Difference]: With dead ends: 16875 [2022-07-14 06:07:19,295 INFO L226 Difference]: Without dead ends: 15713 [2022-07-14 06:07:19,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 17541 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=2968, Invalid=49244, Unknown=0, NotChecked=0, Total=52212 [2022-07-14 06:07:19,298 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 936 mSDsluCounter, 6988 mSDsCounter, 0 mSdLazyCounter, 7064 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 7255 SdHoareTripleChecker+Invalid, 7598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 7064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:19,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 7255 Invalid, 7598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 7064 Invalid, 0 Unknown, 363 Unchecked, 2.2s Time] [2022-07-14 06:07:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15713 states. [2022-07-14 06:07:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15713 to 6367. [2022-07-14 06:07:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6367 states, 6365 states have (on average 1.0952081696779261) internal successors, (6971), 6366 states have internal predecessors, (6971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:19,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 6971 transitions. [2022-07-14 06:07:19,423 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 6971 transitions. Word has length 107 [2022-07-14 06:07:19,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:19,423 INFO L495 AbstractCegarLoop]: Abstraction has 6367 states and 6971 transitions. [2022-07-14 06:07:19,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.795918367346939) internal successors, (186), 49 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:19,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 6971 transitions. [2022-07-14 06:07:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-14 06:07:19,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:19,426 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:19,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:19,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-07-14 06:07:19,643 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:07:19,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash -618797094, now seen corresponding path program 7 times [2022-07-14 06:07:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:19,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402370578] [2022-07-14 06:07:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 45 proven. 387 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-14 06:07:19,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:19,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402370578] [2022-07-14 06:07:19,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402370578] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:19,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602936323] [2022-07-14 06:07:19,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:07:19,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:19,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:19,960 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:20,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-14 06:07:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-14 06:07:20,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:20,406 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 66 proven. 366 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-14 06:07:20,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:20,676 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 [2022-07-14 06:07:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 66 proven. 366 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-14 06:07:20,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602936323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:20,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:20,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 46 [2022-07-14 06:07:20,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100232571] [2022-07-14 06:07:20,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:20,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-14 06:07:20,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:20,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-14 06:07:20,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1937, Unknown=0, NotChecked=0, Total=2162 [2022-07-14 06:07:20,701 INFO L87 Difference]: Start difference. First operand 6367 states and 6971 transitions. Second operand has 47 states, 46 states have (on average 4.130434782608695) internal successors, (190), 47 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:21,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:21,569 INFO L93 Difference]: Finished difference Result 13095 states and 13903 transitions. [2022-07-14 06:07:21,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-14 06:07:21,569 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.130434782608695) internal successors, (190), 47 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2022-07-14 06:07:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:21,578 INFO L225 Difference]: With dead ends: 13095 [2022-07-14 06:07:21,578 INFO L226 Difference]: Without dead ends: 13095 [2022-07-14 06:07:21,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=970, Invalid=4286, Unknown=0, NotChecked=0, Total=5256 [2022-07-14 06:07:21,579 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 657 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:21,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 1379 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:07:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2022-07-14 06:07:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 6472. [2022-07-14 06:07:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6472 states, 6470 states have (on average 1.0969088098918083) internal successors, (7097), 6471 states have internal predecessors, (7097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:21,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6472 states to 6472 states and 7097 transitions. [2022-07-14 06:07:21,637 INFO L78 Accepts]: Start accepts. Automaton has 6472 states and 7097 transitions. Word has length 116 [2022-07-14 06:07:21,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:21,637 INFO L495 AbstractCegarLoop]: Abstraction has 6472 states and 7097 transitions. [2022-07-14 06:07:21,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.130434782608695) internal successors, (190), 47 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:21,637 INFO L276 IsEmpty]: Start isEmpty. Operand 6472 states and 7097 transitions. [2022-07-14 06:07:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-14 06:07:21,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:21,639 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 13, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:21,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:21,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:21,849 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:07:21,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:21,850 INFO L85 PathProgramCache]: Analyzing trace with hash 863300318, now seen corresponding path program 8 times [2022-07-14 06:07:21,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:21,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295243139] [2022-07-14 06:07:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:21,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:22,154 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 147 proven. 420 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 06:07:22,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:22,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295243139] [2022-07-14 06:07:22,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295243139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:22,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354733822] [2022-07-14 06:07:22,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:07:22,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:22,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:22,156 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:22,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-14 06:07:22,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:07:22,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 130 conjunts are in the unsatisfiable core [2022-07-14 06:07:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:22,424 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 6 treesize of output 5 [2022-07-14 06:07:22,629 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 [2022-07-14 06:07:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 147 proven. 415 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-14 06:07:22,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 147 proven. 330 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-14 06:07:22,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354733822] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:22,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:22,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 21] total 56 [2022-07-14 06:07:22,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101948620] [2022-07-14 06:07:22,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:22,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-14 06:07:22,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-14 06:07:22,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2898, Unknown=0, NotChecked=0, Total=3080 [2022-07-14 06:07:22,853 INFO L87 Difference]: Start difference. First operand 6472 states and 7097 transitions. Second operand has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 56 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:29,119 INFO L93 Difference]: Finished difference Result 15686 states and 16683 transitions. [2022-07-14 06:07:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-07-14 06:07:29,119 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 56 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2022-07-14 06:07:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:29,131 INFO L225 Difference]: With dead ends: 15686 [2022-07-14 06:07:29,132 INFO L226 Difference]: Without dead ends: 15224 [2022-07-14 06:07:29,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11548 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2667, Invalid=39153, Unknown=0, NotChecked=0, Total=41820 [2022-07-14 06:07:29,133 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 903 mSDsluCounter, 5466 mSDsCounter, 0 mSdLazyCounter, 6179 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 5700 SdHoareTripleChecker+Invalid, 6328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 6179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:29,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 5700 Invalid, 6328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 6179 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-14 06:07:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15224 states. [2022-07-14 06:07:29,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15224 to 6512. [2022-07-14 06:07:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6510 states have (on average 1.0935483870967742) internal successors, (7119), 6511 states have internal predecessors, (7119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 7119 transitions. [2022-07-14 06:07:29,200 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 7119 transitions. Word has length 121 [2022-07-14 06:07:29,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:29,200 INFO L495 AbstractCegarLoop]: Abstraction has 6512 states and 7119 transitions. [2022-07-14 06:07:29,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9285714285714284) internal successors, (220), 56 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 7119 transitions. [2022-07-14 06:07:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-14 06:07:29,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:29,203 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 14, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:29,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-14 06:07:29,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-07-14 06:07:29,404 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:07:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:29,404 INFO L85 PathProgramCache]: Analyzing trace with hash -560233150, now seen corresponding path program 9 times [2022-07-14 06:07:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:29,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946904244] [2022-07-14 06:07:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:29,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 101 proven. 546 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:07:29,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:29,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946904244] [2022-07-14 06:07:29,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946904244] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:29,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329151256] [2022-07-14 06:07:29,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:07:29,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:29,878 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:29,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-14 06:07:30,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-14 06:07:30,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:30,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 193 conjunts are in the unsatisfiable core [2022-07-14 06:07:30,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:30,104 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 [2022-07-14 06:07:30,461 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 [2022-07-14 06:07:30,498 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 [2022-07-14 06:07:31,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 10 [2022-07-14 06:07:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 98 proven. 549 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:07:31,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 101 proven. 455 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-14 06:07:32,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329151256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:32,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:32,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38, 23] total 80 [2022-07-14 06:07:32,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319249731] [2022-07-14 06:07:32,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:32,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-14 06:07:32,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:32,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-14 06:07:32,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=6039, Unknown=0, NotChecked=0, Total=6320 [2022-07-14 06:07:32,297 INFO L87 Difference]: Start difference. First operand 6512 states and 7119 transitions. Second operand has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:40,664 INFO L93 Difference]: Finished difference Result 19007 states and 20201 transitions. [2022-07-14 06:07:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2022-07-14 06:07:40,665 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 states have internal predecessors, (295), 0 states have call successors, (0), 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 126 [2022-07-14 06:07:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:40,679 INFO L225 Difference]: With dead ends: 19007 [2022-07-14 06:07:40,679 INFO L226 Difference]: Without dead ends: 18399 [2022-07-14 06:07:40,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 259 SyntacticMatches, 8 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36284 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=4102, Invalid=93554, Unknown=0, NotChecked=0, Total=97656 [2022-07-14 06:07:40,682 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 948 mSDsluCounter, 11573 mSDsCounter, 0 mSdLazyCounter, 9139 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 948 SdHoareTripleChecker+Valid, 11906 SdHoareTripleChecker+Invalid, 12023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 9139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2715 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:40,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [948 Valid, 11906 Invalid, 12023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 9139 Invalid, 0 Unknown, 2715 Unchecked, 2.2s Time] [2022-07-14 06:07:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18399 states. [2022-07-14 06:07:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18399 to 6552. [2022-07-14 06:07:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6552 states, 6550 states have (on average 1.0902290076335879) internal successors, (7141), 6551 states have internal predecessors, (7141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6552 states to 6552 states and 7141 transitions. [2022-07-14 06:07:40,759 INFO L78 Accepts]: Start accepts. Automaton has 6552 states and 7141 transitions. Word has length 126 [2022-07-14 06:07:40,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:40,760 INFO L495 AbstractCegarLoop]: Abstraction has 6552 states and 7141 transitions. [2022-07-14 06:07:40,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.6875) internal successors, (295), 80 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6552 states and 7141 transitions. [2022-07-14 06:07:40,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-14 06:07:40,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:40,762 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 15, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:40,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-14 06:07:40,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:40,975 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:07:40,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1339438754, now seen corresponding path program 10 times [2022-07-14 06:07:40,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:40,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415735089] [2022-07-14 06:07:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 32 proven. 551 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-14 06:07:41,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:41,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415735089] [2022-07-14 06:07:41,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415735089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:41,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765326982] [2022-07-14 06:07:41,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:07:41,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:41,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:41,372 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:41,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-14 06:07:41,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:07:41,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:41,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 141 conjunts are in the unsatisfiable core [2022-07-14 06:07:41,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:41,537 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:07:41,537 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 [2022-07-14 06:07:41,812 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 [2022-07-14 06:07:42,413 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 [2022-07-14 06:07:43,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:07:43,007 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:07:43,007 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 [2022-07-14 06:07:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 138 proven. 588 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:43,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:44,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:07:44,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:07:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 161 proven. 565 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:07:44,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765326982] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:44,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:44,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 37, 37] total 85 [2022-07-14 06:07:44,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704919882] [2022-07-14 06:07:44,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:44,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-14 06:07:44,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:44,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-14 06:07:44,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=6639, Unknown=0, NotChecked=0, Total=7140 [2022-07-14 06:07:44,735 INFO L87 Difference]: Start difference. First operand 6552 states and 7141 transitions. Second operand has 85 states, 85 states have (on average 3.5764705882352943) internal successors, (304), 85 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:47,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:47,057 INFO L93 Difference]: Finished difference Result 11409 states and 12268 transitions. [2022-07-14 06:07:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-14 06:07:47,057 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.5764705882352943) internal successors, (304), 85 states have internal predecessors, (304), 0 states have call successors, (0), 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 131 [2022-07-14 06:07:47,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:47,064 INFO L225 Difference]: With dead ends: 11409 [2022-07-14 06:07:47,065 INFO L226 Difference]: Without dead ends: 10786 [2022-07-14 06:07:47,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6083 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1941, Invalid=19229, Unknown=0, NotChecked=0, Total=21170 [2022-07-14 06:07:47,066 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 289 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 2161 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:47,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 2161 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1160 Invalid, 0 Unknown, 598 Unchecked, 0.4s Time] [2022-07-14 06:07:47,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10786 states. [2022-07-14 06:07:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10786 to 5927. [2022-07-14 06:07:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5927 states, 5925 states have (on average 1.091476793248945) internal successors, (6467), 5926 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 6467 transitions. [2022-07-14 06:07:47,107 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 6467 transitions. Word has length 131 [2022-07-14 06:07:47,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:47,107 INFO L495 AbstractCegarLoop]: Abstraction has 5927 states and 6467 transitions. [2022-07-14 06:07:47,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.5764705882352943) internal successors, (304), 85 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 6467 transitions. [2022-07-14 06:07:47,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-14 06:07:47,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:47,109 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 16, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:47,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-14 06:07:47,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:47,326 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:07:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1222399212, now seen corresponding path program 11 times [2022-07-14 06:07:47,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:47,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74826776] [2022-07-14 06:07:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:47,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 91 proven. 636 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-14 06:07:47,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74826776] [2022-07-14 06:07:47,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74826776] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263705937] [2022-07-14 06:07:47,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:07:47,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:47,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:47,650 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:47,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-14 06:07:47,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-14 06:07:47,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:47,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 107 conjunts are in the unsatisfiable core [2022-07-14 06:07:47,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:47,919 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:07:47,919 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 [2022-07-14 06:07:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 120 proven. 607 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-14 06:07:48,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:07:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 153 proven. 574 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-14 06:07:49,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263705937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:07:49,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:07:49,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 69 [2022-07-14 06:07:49,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885054319] [2022-07-14 06:07:49,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:07:49,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-14 06:07:49,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:07:49,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-14 06:07:49,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=4252, Unknown=0, NotChecked=0, Total=4830 [2022-07-14 06:07:49,362 INFO L87 Difference]: Start difference. First operand 5927 states and 6467 transitions. Second operand has 70 states, 69 states have (on average 4.420289855072464) internal successors, (305), 70 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:51,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:07:51,260 INFO L93 Difference]: Finished difference Result 18821 states and 20024 transitions. [2022-07-14 06:07:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-14 06:07:51,260 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 4.420289855072464) internal successors, (305), 70 states have internal predecessors, (305), 0 states have call successors, (0), 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 144 [2022-07-14 06:07:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:07:51,276 INFO L225 Difference]: With dead ends: 18821 [2022-07-14 06:07:51,277 INFO L226 Difference]: Without dead ends: 18821 [2022-07-14 06:07:51,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2352, Invalid=9638, Unknown=0, NotChecked=0, Total=11990 [2022-07-14 06:07:51,278 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 709 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:07:51,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 1880 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2407 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-14 06:07:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18821 states. [2022-07-14 06:07:51,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18821 to 6037. [2022-07-14 06:07:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6037 states, 6035 states have (on average 1.0932891466445733) internal successors, (6598), 6036 states have internal predecessors, (6598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6037 states to 6037 states and 6598 transitions. [2022-07-14 06:07:51,359 INFO L78 Accepts]: Start accepts. Automaton has 6037 states and 6598 transitions. Word has length 144 [2022-07-14 06:07:51,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:07:51,359 INFO L495 AbstractCegarLoop]: Abstraction has 6037 states and 6598 transitions. [2022-07-14 06:07:51,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 4.420289855072464) internal successors, (305), 70 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:07:51,359 INFO L276 IsEmpty]: Start isEmpty. Operand 6037 states and 6598 transitions. [2022-07-14 06:07:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-14 06:07:51,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:07:51,362 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 17, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:07:51,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-14 06:07:51,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-14 06:07:51,583 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-07-14 06:07:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:07:51,583 INFO L85 PathProgramCache]: Analyzing trace with hash 915020772, now seen corresponding path program 12 times [2022-07-14 06:07:51,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:07:51,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49227139] [2022-07-14 06:07:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:07:51,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:07:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:07:52,076 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 195 proven. 752 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-14 06:07:52,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:07:52,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49227139] [2022-07-14 06:07:52,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49227139] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:07:52,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461413905] [2022-07-14 06:07:52,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:07:52,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:07:52,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:07:52,078 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:07:52,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-14 06:07:52,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-14 06:07:52,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:07:52,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-14 06:07:52,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:07:52,371 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:07:52,371 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 [2022-07-14 06:07:52,817 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 [2022-07-14 06:08:25,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:08:25,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2022-07-14 06:08:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 220 proven. 589 refuted. 5 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-14 06:08:25,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:08:26,321 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 13 treesize of output 11 [2022-07-14 06:08:26,323 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 20 treesize of output 18 [2022-07-14 06:08:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 225 proven. 589 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-14 06:08:27,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461413905] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:08:27,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:08:27,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 29, 29] total 87 [2022-07-14 06:08:27,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636981502] [2022-07-14 06:08:27,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:08:27,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-14 06:08:27,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:08:27,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-14 06:08:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=6949, Unknown=1, NotChecked=0, Total=7482 [2022-07-14 06:08:27,155 INFO L87 Difference]: Start difference. First operand 6037 states and 6598 transitions. Second operand has 87 states, 87 states have (on average 4.0344827586206895) internal successors, (351), 87 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)