./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcmp-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/cstrcmp-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 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 05:59:13,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 05:59:13,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 05:59:13,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 05:59:13,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 05:59:13,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 05:59:13,544 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 05:59:13,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 05:59:13,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 05:59:13,550 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 05:59:13,551 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 05:59:13,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 05:59:13,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 05:59:13,554 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 05:59:13,555 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 05:59:13,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 05:59:13,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 05:59:13,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 05:59:13,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 05:59:13,564 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 05:59:13,566 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 05:59:13,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 05:59:13,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 05:59:13,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 05:59:13,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 05:59:13,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 05:59:13,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 05:59:13,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 05:59:13,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 05:59:13,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 05:59:13,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 05:59:13,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 05:59:13,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 05:59:13,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 05:59:13,578 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 05:59:13,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 05:59:13,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 05:59:13,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 05:59:13,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 05:59:13,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 05:59:13,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 05:59:13,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 05:59:13,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 05:59:13,605 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 05:59:13,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 05:59:13,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 05:59:13,606 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 05:59:13,607 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 05:59:13,607 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 05:59:13,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 05:59:13,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 05:59:13,608 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 05:59:13,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 05:59:13,608 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 05:59:13,609 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 05:59:13,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 05:59:13,609 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 05:59:13,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 05:59:13,609 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 05:59:13,609 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 05:59:13,609 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 05:59:13,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 05:59:13,610 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 05:59:13,610 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 05:59:13,610 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 05:59:13,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 05:59:13,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 05:59:13,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 05:59:13,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 05:59:13,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 05:59:13,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 05:59:13,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 05:59:13,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 05:59:13,612 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 [2022-07-14 05:59:13,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 05:59:13,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 05:59:13,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 05:59:13,830 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 05:59:13,831 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 05:59:13,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2022-07-14 05:59:13,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a42e8fea/ec97fa8e61b34aafb3fa8e0ef0092abb/FLAGbded71ce8 [2022-07-14 05:59:14,211 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 05:59:14,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2022-07-14 05:59:14,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a42e8fea/ec97fa8e61b34aafb3fa8e0ef0092abb/FLAGbded71ce8 [2022-07-14 05:59:14,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a42e8fea/ec97fa8e61b34aafb3fa8e0ef0092abb [2022-07-14 05:59:14,605 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 05:59:14,606 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 05:59:14,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 05:59:14,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 05:59:14,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 05:59:14,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15629c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14, skipping insertion in model container [2022-07-14 05:59:14,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 05:59:14,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 05:59:14,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 05:59:14,843 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 05:59:14,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 05:59:14,904 INFO L208 MainTranslator]: Completed translation [2022-07-14 05:59:14,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14 WrapperNode [2022-07-14 05:59:14,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 05:59:14,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 05:59:14,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 05:59:14,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 05:59:14,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,953 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-07-14 05:59:14,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 05:59:14,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 05:59:14,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 05:59:14,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 05:59:14,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,963 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 05:59:14,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 05:59:14,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 05:59:14,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 05:59:14,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (1/1) ... [2022-07-14 05:59:14,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 05:59:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:15,007 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 05:59:15,012 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 05:59:15,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 05:59:15,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 05:59:15,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 05:59:15,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 05:59:15,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 05:59:15,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 05:59:15,119 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 05:59:15,121 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 05:59:15,277 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 05:59:15,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 05:59:15,281 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-14 05:59:15,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:59:15 BoogieIcfgContainer [2022-07-14 05:59:15,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 05:59:15,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 05:59:15,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 05:59:15,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 05:59:15,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 05:59:14" (1/3) ... [2022-07-14 05:59:15,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcef874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 05:59:15, skipping insertion in model container [2022-07-14 05:59:15,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 05:59:14" (2/3) ... [2022-07-14 05:59:15,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcef874 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 05:59:15, skipping insertion in model container [2022-07-14 05:59:15,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:59:15" (3/3) ... [2022-07-14 05:59:15,290 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2022-07-14 05:59:15,303 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 05:59:15,303 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-14 05:59:15,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 05:59:15,342 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@2e974927, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@21fd49b1 [2022-07-14 05:59:15,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-14 05:59:15,345 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 33 states have (on average 1.878787878787879) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 05:59:15,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:15,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:15,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:15,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:15,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-14 05:59:15,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:15,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849721193] [2022-07-14 05:59:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:15,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:15,550 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 05:59:15,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:15,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849721193] [2022-07-14 05:59:15,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849721193] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:15,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:15,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 05:59:15,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160167375] [2022-07-14 05:59:15,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:15,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:15,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:15,580 INFO L87 Difference]: Start difference. First operand has 53 states, 33 states have (on average 1.878787878787879) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 05:59:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:15,636 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2022-07-14 05:59:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:15,639 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 05:59:15,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:15,648 INFO L225 Difference]: With dead ends: 98 [2022-07-14 05:59:15,648 INFO L226 Difference]: Without dead ends: 94 [2022-07-14 05:59:15,650 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 05:59:15,654 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 48 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:15,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:15,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-14 05:59:15,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2022-07-14 05:59:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-07-14 05:59:15,683 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 7 [2022-07-14 05:59:15,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:15,684 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-07-14 05:59:15,684 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 05:59:15,684 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-07-14 05:59:15,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 05:59:15,684 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:15,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:15,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 05:59:15,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-14 05:59:15,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:15,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753990492] [2022-07-14 05:59:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:15,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:15,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:15,773 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 05:59:15,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:15,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753990492] [2022-07-14 05:59:15,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753990492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:15,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:15,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 05:59:15,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884897413] [2022-07-14 05:59:15,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:15,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 05:59:15,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:15,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 05:59:15,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 05:59:15,777 INFO L87 Difference]: Start difference. First operand 54 states and 61 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 05:59:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:15,812 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2022-07-14 05:59:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 05:59:15,812 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 05:59:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:15,814 INFO L225 Difference]: With dead ends: 52 [2022-07-14 05:59:15,815 INFO L226 Difference]: Without dead ends: 52 [2022-07-14 05:59:15,818 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 05:59:15,820 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:15,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:15,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-14 05:59:15,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-14 05:59:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 51 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 05:59:15,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-07-14 05:59:15,829 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 7 [2022-07-14 05:59:15,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:15,829 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-07-14 05:59:15,830 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 05:59:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-07-14 05:59:15,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 05:59:15,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:15,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:15,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 05:59:15,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:15,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:15,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-14 05:59:15,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:15,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806679092] [2022-07-14 05:59:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:15,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:15,896 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 05:59:15,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:15,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806679092] [2022-07-14 05:59:15,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806679092] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:15,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:15,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:59:15,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617604084] [2022-07-14 05:59:15,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:15,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:15,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:15,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:15,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:15,900 INFO L87 Difference]: Start difference. First operand 52 states and 59 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 05:59:15,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:15,994 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2022-07-14 05:59:15,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:15,995 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 05:59:15,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:15,996 INFO L225 Difference]: With dead ends: 95 [2022-07-14 05:59:15,997 INFO L226 Difference]: Without dead ends: 95 [2022-07-14 05:59:15,998 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 05:59:15,999 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:16,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-14 05:59:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 54. [2022-07-14 05:59:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-14 05:59:16,005 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 7 [2022-07-14 05:59:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:16,005 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-14 05:59:16,006 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 05:59:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-14 05:59:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 05:59:16,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:16,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:16,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 05:59:16,007 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:16,007 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-14 05:59:16,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:16,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749695156] [2022-07-14 05:59:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:16,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:16,063 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 05:59:16,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:16,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749695156] [2022-07-14 05:59:16,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749695156] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:16,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:16,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:59:16,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659206610] [2022-07-14 05:59:16,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:16,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:16,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:16,066 INFO L87 Difference]: Start difference. First operand 54 states and 62 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 05:59:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:16,097 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-14 05:59:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:16,098 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 05:59:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:16,099 INFO L225 Difference]: With dead ends: 53 [2022-07-14 05:59:16,099 INFO L226 Difference]: Without dead ends: 53 [2022-07-14 05:59:16,100 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 05:59:16,107 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 49 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:16,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 37 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-14 05:59:16,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-14 05:59:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-14 05:59:16,117 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 9 [2022-07-14 05:59:16,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:16,117 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-14 05:59:16,118 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 05:59:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-14 05:59:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 05:59:16,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:16,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:16,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 05:59:16,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:16,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:16,120 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-14 05:59:16,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:16,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088770328] [2022-07-14 05:59:16,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:16,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:16,171 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 05:59:16,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:16,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088770328] [2022-07-14 05:59:16,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088770328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:16,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:16,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 05:59:16,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225426701] [2022-07-14 05:59:16,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:16,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:16,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:16,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:16,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:16,174 INFO L87 Difference]: Start difference. First operand 53 states and 61 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 05:59:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:16,188 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-07-14 05:59:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:16,189 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 05:59:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:16,189 INFO L225 Difference]: With dead ends: 96 [2022-07-14 05:59:16,189 INFO L226 Difference]: Without dead ends: 96 [2022-07-14 05:59:16,190 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 05:59:16,190 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:16,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:16,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-14 05:59:16,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2022-07-14 05:59:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.5625) internal successors, (75), 63 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 05:59:16,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-07-14 05:59:16,195 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 9 [2022-07-14 05:59:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:16,195 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-07-14 05:59:16,196 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 05:59:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-07-14 05:59:16,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 05:59:16,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:16,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:16,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 05:59:16,197 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:16,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:16,197 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-14 05:59:16,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:16,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142145437] [2022-07-14 05:59:16,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:16,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:16,273 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 05:59:16,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:16,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142145437] [2022-07-14 05:59:16,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142145437] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:16,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:16,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 05:59:16,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105064500] [2022-07-14 05:59:16,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:16,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 05:59:16,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:16,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 05:59:16,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 05:59:16,275 INFO L87 Difference]: Start difference. First operand 64 states and 75 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 05:59:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:16,324 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2022-07-14 05:59:16,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 05:59:16,324 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 05:59:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:16,325 INFO L225 Difference]: With dead ends: 100 [2022-07-14 05:59:16,325 INFO L226 Difference]: Without dead ends: 100 [2022-07-14 05:59:16,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 05:59:16,326 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 120 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:16,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 66 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:16,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-14 05:59:16,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 62. [2022-07-14 05:59:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 61 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-07-14 05:59:16,333 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 9 [2022-07-14 05:59:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:16,333 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-07-14 05:59:16,333 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 05:59:16,333 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-07-14 05:59:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 05:59:16,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:16,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:16,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 05:59:16,335 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:16,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:16,336 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-14 05:59:16,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:16,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222426377] [2022-07-14 05:59:16,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:16,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:16,408 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 05:59:16,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:16,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222426377] [2022-07-14 05:59:16,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222426377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:16,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:16,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 05:59:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383151388] [2022-07-14 05:59:16,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:16,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 05:59:16,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 05:59:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 05:59:16,409 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:16,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:16,482 INFO L93 Difference]: Finished difference Result 96 states and 110 transitions. [2022-07-14 05:59:16,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 05:59:16,483 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 05:59:16,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:16,484 INFO L225 Difference]: With dead ends: 96 [2022-07-14 05:59:16,484 INFO L226 Difference]: Without dead ends: 96 [2022-07-14 05:59:16,484 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 05:59:16,485 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:16,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 85 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:16,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-14 05:59:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2022-07-14 05:59:16,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.52) internal successors, (76), 63 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2022-07-14 05:59:16,489 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 9 [2022-07-14 05:59:16,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:16,489 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2022-07-14 05:59:16,489 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 05:59:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2022-07-14 05:59:16,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 05:59:16,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:16,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:16,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 05:59:16,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:16,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:16,491 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-14 05:59:16,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:16,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354426738] [2022-07-14 05:59:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:16,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:16,528 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 05:59:16,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:16,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354426738] [2022-07-14 05:59:16,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354426738] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:16,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:16,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:59:16,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852121311] [2022-07-14 05:59:16,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:16,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:16,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:16,530 INFO L87 Difference]: Start difference. First operand 64 states and 76 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 05:59:16,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:16,554 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-07-14 05:59:16,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:16,555 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 05:59:16,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:16,556 INFO L225 Difference]: With dead ends: 63 [2022-07-14 05:59:16,556 INFO L226 Difference]: Without dead ends: 63 [2022-07-14 05:59:16,556 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 05:59:16,557 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:16,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 37 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:16,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-14 05:59:16,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-14 05:59:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.5) internal successors, (75), 62 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 05:59:16,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-14 05:59:16,560 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 10 [2022-07-14 05:59:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:16,560 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-14 05:59:16,560 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 05:59:16,561 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-14 05:59:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 05:59:16,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:16,561 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:16,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 05:59:16,562 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:16,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-14 05:59:16,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:16,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31244904] [2022-07-14 05:59:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:16,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:16,614 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 05:59:16,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:16,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31244904] [2022-07-14 05:59:16,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31244904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:16,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705776411] [2022-07-14 05:59:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:16,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:16,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:16,632 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 05:59:16,657 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 05:59:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:16,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 05:59:16,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:16,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:59:16,779 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 05:59:16,785 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 05:59:16,876 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 05:59:16,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:17,066 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 05:59:17,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705776411] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:17,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:17,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-14 05:59:17,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130187664] [2022-07-14 05:59:17,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:17,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 05:59:17,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 05:59:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-14 05:59:17,068 INFO L87 Difference]: Start difference. First operand 63 states and 75 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 05:59:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:17,274 INFO L93 Difference]: Finished difference Result 146 states and 167 transitions. [2022-07-14 05:59:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 05:59:17,275 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 05:59:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:17,276 INFO L225 Difference]: With dead ends: 146 [2022-07-14 05:59:17,276 INFO L226 Difference]: Without dead ends: 146 [2022-07-14 05:59:17,276 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 05:59:17,277 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 198 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:17,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 252 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-14 05:59:17,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 58. [2022-07-14 05:59:17,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 57 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 05:59:17,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-07-14 05:59:17,292 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 11 [2022-07-14 05:59:17,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:17,292 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-07-14 05:59:17,293 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 05:59:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-07-14 05:59:17,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 05:59:17,293 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:17,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:17,314 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 05:59:17,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:17,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:17,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:17,511 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2022-07-14 05:59:17,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:17,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003176141] [2022-07-14 05:59:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:17,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:17,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:17,550 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 05:59:17,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:17,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003176141] [2022-07-14 05:59:17,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003176141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:17,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:17,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 05:59:17,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471299881] [2022-07-14 05:59:17,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:17,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 05:59:17,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:17,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 05:59:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 05:59:17,552 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:17,598 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-07-14 05:59:17,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 05:59:17,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-14 05:59:17,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:17,599 INFO L225 Difference]: With dead ends: 81 [2022-07-14 05:59:17,599 INFO L226 Difference]: Without dead ends: 81 [2022-07-14 05:59:17,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 05:59:17,600 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 158 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:17,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 63 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:17,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-14 05:59:17,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2022-07-14 05:59:17,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:17,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-07-14 05:59:17,602 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 12 [2022-07-14 05:59:17,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:17,602 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-07-14 05:59:17,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:17,603 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-07-14 05:59:17,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 05:59:17,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:17,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:17,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 05:59:17,604 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-14 05:59:17,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:17,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291712495] [2022-07-14 05:59:17,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:17,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:17,630 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 05:59:17,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:17,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291712495] [2022-07-14 05:59:17,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291712495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:17,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:17,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:59:17,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062163976] [2022-07-14 05:59:17,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:17,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:17,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:17,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:17,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:17,633 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:17,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:17,657 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-07-14 05:59:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:17,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-14 05:59:17,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:17,658 INFO L225 Difference]: With dead ends: 63 [2022-07-14 05:59:17,658 INFO L226 Difference]: Without dead ends: 63 [2022-07-14 05:59:17,659 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 05:59:17,659 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:17,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:17,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-14 05:59:17,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-14 05:59:17,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:17,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-14 05:59:17,663 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 12 [2022-07-14 05:59:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:17,663 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-14 05:59:17,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-14 05:59:17,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 05:59:17,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:17,666 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:17,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 05:59:17,666 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:17,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:17,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-14 05:59:17,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:17,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493203145] [2022-07-14 05:59:17,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:17,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:17,730 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 05:59:17,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493203145] [2022-07-14 05:59:17,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493203145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:17,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989508567] [2022-07-14 05:59:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:17,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:17,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:17,733 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 05:59:17,735 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 05:59:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:17,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 05:59:17,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:17,800 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 05:59:17,800 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 05:59:17,862 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 05:59:17,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:17,983 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 05:59:17,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989508567] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:17,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:17,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-14 05:59:17,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529584621] [2022-07-14 05:59:17,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:17,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 05:59:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 05:59:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-14 05:59:17,985 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:18,109 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-07-14 05:59:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 05:59:18,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 05:59:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:18,110 INFO L225 Difference]: With dead ends: 133 [2022-07-14 05:59:18,110 INFO L226 Difference]: Without dead ends: 133 [2022-07-14 05:59:18,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-14 05:59:18,111 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 232 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:18,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 188 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-07-14 05:59:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 60. [2022-07-14 05:59:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.3846153846153846) 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 05:59:18,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-14 05:59:18,113 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 13 [2022-07-14 05:59:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:18,114 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-14 05:59:18,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-14 05:59:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 05:59:18,114 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:18,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:18,136 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 05:59:18,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-14 05:59:18,324 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:18,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:18,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1432374396, now seen corresponding path program 1 times [2022-07-14 05:59:18,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:18,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583203182] [2022-07-14 05:59:18,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:18,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:18,357 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 05:59:18,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:18,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583203182] [2022-07-14 05:59:18,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583203182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:18,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:18,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:59:18,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441465836] [2022-07-14 05:59:18,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:18,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 05:59:18,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:18,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 05:59:18,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 05:59:18,359 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 05:59:18,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:18,378 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2022-07-14 05:59:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:18,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 05:59:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:18,379 INFO L225 Difference]: With dead ends: 58 [2022-07-14 05:59:18,379 INFO L226 Difference]: Without dead ends: 58 [2022-07-14 05:59:18,379 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 05:59:18,380 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:18,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:18,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-14 05:59:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-14 05:59:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-07-14 05:59:18,383 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 16 [2022-07-14 05:59:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:18,384 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-07-14 05:59:18,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 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 05:59:18,384 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-07-14 05:59:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 05:59:18,385 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:18,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:18,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-14 05:59:18,385 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:18,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1432374395, now seen corresponding path program 1 times [2022-07-14 05:59:18,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:18,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034554284] [2022-07-14 05:59:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:18,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:18,444 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 05:59:18,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034554284] [2022-07-14 05:59:18,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034554284] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:18,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:18,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 05:59:18,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465473704] [2022-07-14 05:59:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:18,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 05:59:18,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:18,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 05:59:18,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 05:59:18,447 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:18,480 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-07-14 05:59:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 05:59:18,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-14 05:59:18,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:18,481 INFO L225 Difference]: With dead ends: 66 [2022-07-14 05:59:18,482 INFO L226 Difference]: Without dead ends: 66 [2022-07-14 05:59:18,482 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 05:59:18,482 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 117 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:18,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 58 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-14 05:59:18,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-07-14 05:59:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-07-14 05:59:18,485 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 16 [2022-07-14 05:59:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:18,485 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-07-14 05:59:18,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-07-14 05:59:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 05:59:18,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:18,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:18,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 05:59:18,487 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1432365322, now seen corresponding path program 1 times [2022-07-14 05:59:18,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:18,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076915066] [2022-07-14 05:59:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:18,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:18,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:18,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076915066] [2022-07-14 05:59:18,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076915066] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:18,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:18,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 05:59:18,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10859587] [2022-07-14 05:59:18,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:18,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 05:59:18,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:18,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 05:59:18,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 05:59:18,508 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 05:59:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:18,512 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-07-14 05:59:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 05:59:18,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 05:59:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:18,513 INFO L225 Difference]: With dead ends: 62 [2022-07-14 05:59:18,513 INFO L226 Difference]: Without dead ends: 62 [2022-07-14 05:59:18,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 05:59:18,515 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:18,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-14 05:59:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-14 05:59:18,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 61 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 05:59:18,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-07-14 05:59:18,517 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 16 [2022-07-14 05:59:18,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:18,517 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-07-14 05:59:18,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 05:59:18,517 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-07-14 05:59:18,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 05:59:18,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:18,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:18,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-14 05:59:18,518 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:18,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1365500555, now seen corresponding path program 1 times [2022-07-14 05:59:18,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:18,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700217916] [2022-07-14 05:59:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:18,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:18,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:18,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700217916] [2022-07-14 05:59:18,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700217916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:18,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:18,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 05:59:18,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403317180] [2022-07-14 05:59:18,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:18,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 05:59:18,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:18,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 05:59:18,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-14 05:59:18,582 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:18,663 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2022-07-14 05:59:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 05:59:18,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-14 05:59:18,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:18,664 INFO L225 Difference]: With dead ends: 85 [2022-07-14 05:59:18,664 INFO L226 Difference]: Without dead ends: 85 [2022-07-14 05:59:18,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-14 05:59:18,664 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:18,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 188 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-14 05:59:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2022-07-14 05:59:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 74 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 05:59:18,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2022-07-14 05:59:18,667 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 19 [2022-07-14 05:59:18,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:18,667 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2022-07-14 05:59:18,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,668 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2022-07-14 05:59:18,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-14 05:59:18,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:18,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:18,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-14 05:59:18,669 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1341118839, now seen corresponding path program 1 times [2022-07-14 05:59:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:18,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689056179] [2022-07-14 05:59:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:18,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:18,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:18,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689056179] [2022-07-14 05:59:18,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689056179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:18,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:18,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 05:59:18,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048639600] [2022-07-14 05:59:18,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:18,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 05:59:18,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:18,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 05:59:18,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-14 05:59:18,777 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:18,933 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2022-07-14 05:59:18,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 05:59:18,934 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-14 05:59:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:18,934 INFO L225 Difference]: With dead ends: 106 [2022-07-14 05:59:18,935 INFO L226 Difference]: Without dead ends: 106 [2022-07-14 05:59:18,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-07-14 05:59:18,935 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 109 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:18,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 199 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-14 05:59:18,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2022-07-14 05:59:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.267605633802817) internal successors, (90), 76 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2022-07-14 05:59:18,937 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 19 [2022-07-14 05:59:18,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:18,938 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2022-07-14 05:59:18,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2022-07-14 05:59:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 05:59:18,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:18,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:18,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-14 05:59:18,939 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:18,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:18,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1756023060, now seen corresponding path program 1 times [2022-07-14 05:59:18,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:18,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111168734] [2022-07-14 05:59:18,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:18,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:19,068 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 05:59:19,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:19,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111168734] [2022-07-14 05:59:19,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111168734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:19,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:19,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-14 05:59:19,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092454340] [2022-07-14 05:59:19,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:19,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 05:59:19,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:19,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 05:59:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-14 05:59:19,070 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:19,280 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2022-07-14 05:59:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 05:59:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-14 05:59:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:19,281 INFO L225 Difference]: With dead ends: 134 [2022-07-14 05:59:19,281 INFO L226 Difference]: Without dead ends: 134 [2022-07-14 05:59:19,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2022-07-14 05:59:19,282 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 150 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:19,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 313 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-14 05:59:19,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2022-07-14 05:59:19,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 94 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 05:59:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2022-07-14 05:59:19,284 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 23 [2022-07-14 05:59:19,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:19,284 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2022-07-14 05:59:19,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2022-07-14 05:59:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 05:59:19,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:19,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:19,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-14 05:59:19,285 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1756082642, now seen corresponding path program 1 times [2022-07-14 05:59:19,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:19,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654301277] [2022-07-14 05:59:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:19,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:19,333 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 05:59:19,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:19,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654301277] [2022-07-14 05:59:19,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654301277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:19,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:19,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 05:59:19,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591878608] [2022-07-14 05:59:19,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:19,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 05:59:19,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:19,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 05:59:19,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 05:59:19,335 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:19,350 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-07-14 05:59:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 05:59:19,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-14 05:59:19,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:19,351 INFO L225 Difference]: With dead ends: 94 [2022-07-14 05:59:19,351 INFO L226 Difference]: Without dead ends: 55 [2022-07-14 05:59:19,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 05:59:19,351 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:19,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 66 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 05:59:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-14 05:59:19,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-07-14 05:59:19,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 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 05:59:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-14 05:59:19,354 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 23 [2022-07-14 05:59:19,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:19,354 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-14 05:59:19,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:19,354 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-14 05:59:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 05:59:19,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:19,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:19,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-14 05:59:19,356 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:19,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:19,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1222026810, now seen corresponding path program 1 times [2022-07-14 05:59:19,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:19,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708506255] [2022-07-14 05:59:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:19,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:19,416 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 05:59:19,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:19,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708506255] [2022-07-14 05:59:19,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708506255] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:19,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274239899] [2022-07-14 05:59:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:19,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:19,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:19,418 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 05:59:19,420 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 05:59:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:19,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 05:59:19,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:19,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 05:59:19,491 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 05:59:19,494 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 05:59:19,572 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 05:59:19,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:19,679 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 05:59:19,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274239899] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:19,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:19,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-07-14 05:59:19,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139301076] [2022-07-14 05:59:19,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:19,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 05:59:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 05:59:19,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-14 05:59:19,681 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 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 05:59:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:19,875 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-07-14 05:59:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 05:59:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 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) Word has length 23 [2022-07-14 05:59:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:19,876 INFO L225 Difference]: With dead ends: 66 [2022-07-14 05:59:19,876 INFO L226 Difference]: Without dead ends: 66 [2022-07-14 05:59:19,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-07-14 05:59:19,877 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:19,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 126 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:19,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-14 05:59:19,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2022-07-14 05:59:19,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:19,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-14 05:59:19,878 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 23 [2022-07-14 05:59:19,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:19,879 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-14 05:59:19,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5) internal successors, (56), 17 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 05:59:19,879 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-14 05:59:19,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 05:59:19,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:19,879 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:19,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-14 05:59:20,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:20,095 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:20,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:20,095 INFO L85 PathProgramCache]: Analyzing trace with hash 340221504, now seen corresponding path program 1 times [2022-07-14 05:59:20,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:20,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835657116] [2022-07-14 05:59:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:20,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:20,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:20,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835657116] [2022-07-14 05:59:20,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835657116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:20,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156879719] [2022-07-14 05:59:20,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:20,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:20,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:20,246 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 05:59:20,247 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 05:59:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:20,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-14 05:59:20,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:20,330 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 05:59:20,471 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 05:59:20,472 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 30 treesize of output 23 [2022-07-14 05:59:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:59:20,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 05:59:20,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156879719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:20,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 05:59:20,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11] total 20 [2022-07-14 05:59:20,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711292215] [2022-07-14 05:59:20,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:20,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 05:59:20,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 05:59:20,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-07-14 05:59:20,492 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:20,653 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-07-14 05:59:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-14 05:59:20,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-14 05:59:20,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:20,654 INFO L225 Difference]: With dead ends: 58 [2022-07-14 05:59:20,654 INFO L226 Difference]: Without dead ends: 40 [2022-07-14 05:59:20,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-07-14 05:59:20,655 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:20,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 128 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 5 Unchecked, 0.0s Time] [2022-07-14 05:59:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-14 05:59:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-07-14 05:59:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-07-14 05:59:20,656 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 27 [2022-07-14 05:59:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:20,656 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-07-14 05:59:20,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:20,656 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-07-14 05:59:20,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-14 05:59:20,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:20,656 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:20,675 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 05:59:20,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:20,857 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:20,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:20,857 INFO L85 PathProgramCache]: Analyzing trace with hash 206207998, now seen corresponding path program 1 times [2022-07-14 05:59:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:20,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186300866] [2022-07-14 05:59:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:20,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:59:20,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:20,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186300866] [2022-07-14 05:59:20,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186300866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 05:59:20,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 05:59:20,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-14 05:59:20,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787801186] [2022-07-14 05:59:20,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 05:59:20,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 05:59:20,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:20,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 05:59:20,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-07-14 05:59:20,984 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:21,189 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-07-14 05:59:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 05:59:21,190 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-14 05:59:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:21,190 INFO L225 Difference]: With dead ends: 54 [2022-07-14 05:59:21,190 INFO L226 Difference]: Without dead ends: 44 [2022-07-14 05:59:21,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-07-14 05:59:21,191 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 91 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:21,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 141 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:21,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-14 05:59:21,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2022-07-14 05:59:21,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states 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 05:59:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-07-14 05:59:21,192 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 27 [2022-07-14 05:59:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:21,193 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-07-14 05:59:21,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-07-14 05:59:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 05:59:21,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:21,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:21,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-14 05:59:21,207 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash 2033318401, now seen corresponding path program 1 times [2022-07-14 05:59:21,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:21,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449226896] [2022-07-14 05:59:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:59:21,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:21,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449226896] [2022-07-14 05:59:21,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449226896] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:21,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358066221] [2022-07-14 05:59:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:21,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:21,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:21,269 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 05:59:21,270 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 05:59:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-14 05:59:21,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:21,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:59:21,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:21,504 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 5 treesize of output 3 [2022-07-14 05:59:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:59:21,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358066221] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:21,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:21,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-07-14 05:59:21,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210938665] [2022-07-14 05:59:21,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:21,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 05:59:21,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:21,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 05:59:21,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-14 05:59:21,521 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 17 states, 16 states have (on average 4.1875) internal successors, (67), 17 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 05:59:21,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:21,675 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2022-07-14 05:59:21,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 05:59:21,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.1875) internal successors, (67), 17 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 31 [2022-07-14 05:59:21,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:21,676 INFO L225 Difference]: With dead ends: 57 [2022-07-14 05:59:21,676 INFO L226 Difference]: Without dead ends: 50 [2022-07-14 05:59:21,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-07-14 05:59:21,677 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 176 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:21,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 121 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-14 05:59:21,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-07-14 05:59:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-07-14 05:59:21,679 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 31 [2022-07-14 05:59:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:21,679 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-07-14 05:59:21,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.1875) internal successors, (67), 17 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 05:59:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-07-14 05:59:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-14 05:59:21,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:21,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:21,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:21,895 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 05:59:21,896 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1630243463, now seen corresponding path program 1 times [2022-07-14 05:59:21,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:21,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279774727] [2022-07-14 05:59:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:21,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:22,003 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:59:22,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:22,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279774727] [2022-07-14 05:59:22,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279774727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:22,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658461953] [2022-07-14 05:59:22,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:22,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:22,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:22,005 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 05:59:22,006 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 05:59:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:22,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-14 05:59:22,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:22,150 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 05:59:22,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:59:22,478 INFO L356 Elim1Store]: treesize reduction 14, result has 54.8 percent of original size [2022-07-14 05:59:22,478 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 33 treesize of output 30 [2022-07-14 05:59:22,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:59:22,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:22,770 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:22,770 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 91 treesize of output 91 [2022-07-14 05:59:22,799 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 36 treesize of output 32 [2022-07-14 05:59:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 05:59:22,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658461953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:22,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:22,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 17] total 38 [2022-07-14 05:59:22,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289675269] [2022-07-14 05:59:22,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:22,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-14 05:59:22,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:22,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-14 05:59:22,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 05:59:22,991 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 05:59:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:23,546 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2022-07-14 05:59:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-14 05:59:23,546 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 34 [2022-07-14 05:59:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:23,547 INFO L225 Difference]: With dead ends: 115 [2022-07-14 05:59:23,547 INFO L226 Difference]: Without dead ends: 59 [2022-07-14 05:59:23,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=365, Invalid=3057, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 05:59:23,548 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 118 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:23,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 384 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 284 Invalid, 0 Unknown, 136 Unchecked, 0.1s Time] [2022-07-14 05:59:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-14 05:59:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2022-07-14 05:59:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 50 states have (on average 1.1) internal successors, (55), 52 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 05:59:23,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-07-14 05:59:23,549 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 34 [2022-07-14 05:59:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:23,550 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-07-14 05:59:23,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 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 05:59:23,550 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-07-14 05:59:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 05:59:23,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:23,550 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:23,568 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 05:59:23,756 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 05:59:23,756 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:23,757 INFO L85 PathProgramCache]: Analyzing trace with hash 143338355, now seen corresponding path program 2 times [2022-07-14 05:59:23,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:23,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547315999] [2022-07-14 05:59:23,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:23,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:59:23,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:23,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547315999] [2022-07-14 05:59:23,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547315999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:23,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285097209] [2022-07-14 05:59:23,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:59:23,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:23,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:23,828 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 05:59:23,829 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 05:59:23,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:59:23,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:23,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 05:59:23,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:59:23,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:24,089 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 05:59:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:59:24,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285097209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:24,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:24,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-07-14 05:59:24,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467332049] [2022-07-14 05:59:24,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:24,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 05:59:24,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:24,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 05:59:24,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-14 05:59:24,116 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:24,278 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2022-07-14 05:59:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 05:59:24,278 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-14 05:59:24,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:24,278 INFO L225 Difference]: With dead ends: 68 [2022-07-14 05:59:24,278 INFO L226 Difference]: Without dead ends: 68 [2022-07-14 05:59:24,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-07-14 05:59:24,279 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 257 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:24,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 208 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-14 05:59:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2022-07-14 05:59:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-07-14 05:59:24,281 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 42 [2022-07-14 05:59:24,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:24,281 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-07-14 05:59:24,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-07-14 05:59:24,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 05:59:24,281 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:24,282 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:24,298 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 05:59:24,491 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 05:59:24,491 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:24,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:24,492 INFO L85 PathProgramCache]: Analyzing trace with hash 794074873, now seen corresponding path program 2 times [2022-07-14 05:59:24,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:24,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787987907] [2022-07-14 05:59:24,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:24,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:59:24,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:24,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787987907] [2022-07-14 05:59:24,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787987907] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:24,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536157963] [2022-07-14 05:59:24,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:59:24,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:24,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:24,569 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 05:59:24,577 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 05:59:24,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:59:24,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:24,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 05:59:24,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:24,745 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:59:24,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:24,859 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 05:59:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:59:24,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536157963] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:24,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:24,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-07-14 05:59:24,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587329622] [2022-07-14 05:59:24,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:24,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 05:59:24,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:24,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 05:59:24,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-07-14 05:59:24,875 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:25,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:25,071 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2022-07-14 05:59:25,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 05:59:25,072 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-14 05:59:25,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:25,072 INFO L225 Difference]: With dead ends: 66 [2022-07-14 05:59:25,072 INFO L226 Difference]: Without dead ends: 62 [2022-07-14 05:59:25,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-07-14 05:59:25,074 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 275 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:25,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 152 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-14 05:59:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2022-07-14 05:59:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 57 states have (on average 1.087719298245614) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-07-14 05:59:25,077 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2022-07-14 05:59:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:25,078 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-07-14 05:59:25,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.684210526315789) internal successors, (89), 20 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:25,084 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-07-14 05:59:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 05:59:25,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:25,085 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:25,111 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 05:59:25,286 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 05:59:25,286 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:25,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:25,287 INFO L85 PathProgramCache]: Analyzing trace with hash -395309695, now seen corresponding path program 3 times [2022-07-14 05:59:25,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:25,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502962735] [2022-07-14 05:59:25,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:25,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:59:25,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:25,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502962735] [2022-07-14 05:59:25,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502962735] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:25,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176729694] [2022-07-14 05:59:25,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:59:25,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:25,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:25,413 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 05:59:25,414 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 05:59:25,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 05:59:25,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:25,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-14 05:59:25,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:25,520 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 05:59:25,520 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 05:59:25,657 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 13 treesize of output 9 [2022-07-14 05:59:26,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 05:59:26,017 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 05:59:26,017 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 32 treesize of output 23 [2022-07-14 05:59:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:59:26,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:26,452 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:26,452 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 87 treesize of output 87 [2022-07-14 05:59:26,461 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 30 treesize of output 28 [2022-07-14 05:59:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 05:59:26,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176729694] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:26,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:26,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 43 [2022-07-14 05:59:26,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922518355] [2022-07-14 05:59:26,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:26,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 05:59:26,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:26,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 05:59:26,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2022-07-14 05:59:26,817 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 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 05:59:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:27,700 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-07-14 05:59:27,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-14 05:59:27,701 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 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) Word has length 49 [2022-07-14 05:59:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:27,701 INFO L225 Difference]: With dead ends: 155 [2022-07-14 05:59:27,701 INFO L226 Difference]: Without dead ends: 74 [2022-07-14 05:59:27,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=494, Invalid=4336, Unknown=0, NotChecked=0, Total=4830 [2022-07-14 05:59:27,703 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 134 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:27,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 411 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 311 Invalid, 0 Unknown, 210 Unchecked, 0.2s Time] [2022-07-14 05:59:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-14 05:59:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2022-07-14 05:59:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 67 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-07-14 05:59:27,706 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 49 [2022-07-14 05:59:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:27,706 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-07-14 05:59:27,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 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 05:59:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-07-14 05:59:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 05:59:27,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:27,707 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:27,731 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 05:59:27,916 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 05:59:27,917 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:27,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2098265017, now seen corresponding path program 4 times [2022-07-14 05:59:27,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:27,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093140047] [2022-07-14 05:59:27,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:27,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:59:28,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093140047] [2022-07-14 05:59:28,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093140047] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:28,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083848154] [2022-07-14 05:59:28,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 05:59:28,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:28,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:28,029 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 05:59:28,031 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 05:59:28,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 05:59:28,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:28,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-14 05:59:28,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:28,103 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 05:59:28,103 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 05:59:28,107 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 05:59:28,314 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 05:59:28,335 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 05:59:28,552 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:28,552 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 05:59:28,718 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:59:28,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:29,032 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_429 (Array Int Int)) (|v_ULTIMATE.start_cstrcmp_~s1#1.offset_37| Int)) (or (not (<= 0 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37|)) (<= (+ |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37|) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_429) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_37|)) 0))) is different from false [2022-07-14 05:59:29,053 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:29,054 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 05:59:29,068 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:29,068 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 05:59:29,072 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 05:59:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 15 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:59:29,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083848154] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:29,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:29,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 38 [2022-07-14 05:59:29,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648386782] [2022-07-14 05:59:29,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:29,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-14 05:59:29,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:29,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-14 05:59:29,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1247, Unknown=1, NotChecked=72, Total=1482 [2022-07-14 05:59:29,780 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 39 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 39 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 05:59:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:30,534 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-07-14 05:59:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 05:59:30,534 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 39 states have internal predecessors, (139), 0 states have call successors, (0), 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 05:59:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:30,535 INFO L225 Difference]: With dead ends: 96 [2022-07-14 05:59:30,535 INFO L226 Difference]: Without dead ends: 96 [2022-07-14 05:59:30,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=367, Invalid=2498, Unknown=1, NotChecked=104, Total=2970 [2022-07-14 05:59:30,536 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 175 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:30,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 434 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 500 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2022-07-14 05:59:30,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-14 05:59:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2022-07-14 05:59:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-07-14 05:59:30,538 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 57 [2022-07-14 05:59:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:30,538 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-07-14 05:59:30,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 39 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 05:59:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-07-14 05:59:30,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-14 05:59:30,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:30,538 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 05:59:30,562 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 05:59:30,738 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 05:59:30,739 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:30,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:30,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1346900531, now seen corresponding path program 3 times [2022-07-14 05:59:30,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:30,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204035853] [2022-07-14 05:59:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:30,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:59:30,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:30,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204035853] [2022-07-14 05:59:30,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204035853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:30,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981546069] [2022-07-14 05:59:30,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:59:30,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:30,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:30,838 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 05:59:30,842 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 05:59:30,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 05:59:30,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:30,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 05:59:30,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:59:31,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:31,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-14 05:59:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:59:31,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981546069] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:31,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:31,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-07-14 05:59:31,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712566730] [2022-07-14 05:59:31,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:31,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 05:59:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:31,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 05:59:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-07-14 05:59:31,276 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 27 states, 26 states have (on average 5.0) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:31,561 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2022-07-14 05:59:31,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 05:59:31,562 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 5.0) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-14 05:59:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:31,562 INFO L225 Difference]: With dead ends: 82 [2022-07-14 05:59:31,562 INFO L226 Difference]: Without dead ends: 78 [2022-07-14 05:59:31,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 05:59:31,563 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 372 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:31,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 200 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 05:59:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-14 05:59:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-14 05:59:31,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states 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 05:59:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-07-14 05:59:31,567 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 61 [2022-07-14 05:59:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:31,567 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-07-14 05:59:31,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 5.0) internal successors, (130), 27 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:31,567 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-07-14 05:59:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-14 05:59:31,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:31,568 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:31,587 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 05:59:31,768 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 05:59:31,769 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:31,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:31,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1797252275, now seen corresponding path program 4 times [2022-07-14 05:59:31,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:31,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782947855] [2022-07-14 05:59:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 40 proven. 37 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 05:59:31,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:31,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782947855] [2022-07-14 05:59:31,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782947855] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:31,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822755660] [2022-07-14 05:59:31,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 05:59:31,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:31,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:31,879 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 05:59:31,880 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 05:59:31,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 05:59:31,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:31,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 05:59:31,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:31,975 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 05:59:31,975 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 05:59:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:32,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 58 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:32,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822755660] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:32,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:32,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 38 [2022-07-14 05:59:32,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851088969] [2022-07-14 05:59:32,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:32,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-14 05:59:32,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-14 05:59:32,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1178, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 05:59:32,874 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 38 states, 38 states have (on average 4.078947368421052) internal successors, (155), 38 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 05:59:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:33,164 INFO L93 Difference]: Finished difference Result 132 states and 136 transitions. [2022-07-14 05:59:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 05:59:33,164 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.078947368421052) internal successors, (155), 38 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-14 05:59:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:33,165 INFO L225 Difference]: With dead ends: 132 [2022-07-14 05:59:33,165 INFO L226 Difference]: Without dead ends: 82 [2022-07-14 05:59:33,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=2183, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 05:59:33,166 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 101 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:33,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 274 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 243 Invalid, 0 Unknown, 185 Unchecked, 0.1s Time] [2022-07-14 05:59:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-14 05:59:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-07-14 05:59:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 81 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 05:59:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-07-14 05:59:33,168 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 68 [2022-07-14 05:59:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:33,168 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-07-14 05:59:33,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.078947368421052) internal successors, (155), 38 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 05:59:33,168 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-07-14 05:59:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-14 05:59:33,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:33,168 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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 05:59:33,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 05:59:33,379 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 05:59:33,379 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:33,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1052266832, now seen corresponding path program 5 times [2022-07-14 05:59:33,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:33,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109151658] [2022-07-14 05:59:33,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:33,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:34,113 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 8 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 05:59:34,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109151658] [2022-07-14 05:59:34,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109151658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:34,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684154690] [2022-07-14 05:59:34,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 05:59:34,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:34,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:34,128 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 05:59:34,191 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 05:59:34,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-14 05:59:34,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:34,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-14 05:59:34,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:34,450 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 05:59:34,922 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-14 05:59:34,923 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 33 treesize of output 30 [2022-07-14 05:59:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 05:59:34,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:35,404 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:35,405 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 91 treesize of output 91 [2022-07-14 05:59:35,457 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 36 treesize of output 32 [2022-07-14 05:59:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 05:59:35,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684154690] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:35,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:35,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 52 [2022-07-14 05:59:35,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314986728] [2022-07-14 05:59:35,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:35,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 05:59:35,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:35,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 05:59:35,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2493, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 05:59:35,609 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 05:59:37,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:37,183 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2022-07-14 05:59:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-14 05:59:37,184 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-14 05:59:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:37,184 INFO L225 Difference]: With dead ends: 182 [2022-07-14 05:59:37,184 INFO L226 Difference]: Without dead ends: 120 [2022-07-14 05:59:37,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 114 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=450, Invalid=6356, Unknown=0, NotChecked=0, Total=6806 [2022-07-14 05:59:37,186 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 140 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 443 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:37,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 839 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 784 Invalid, 0 Unknown, 443 Unchecked, 0.3s Time] [2022-07-14 05:59:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-14 05:59:37,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2022-07-14 05:59:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 85 states have internal predecessors, (88), 0 states have call successors, (0), 0 states 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 05:59:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2022-07-14 05:59:37,188 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 72 [2022-07-14 05:59:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:37,189 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2022-07-14 05:59:37,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.076923076923077) internal successors, (160), 52 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 05:59:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2022-07-14 05:59:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-14 05:59:37,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:37,190 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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 05:59:37,206 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 05:59:37,398 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 05:59:37,399 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:37,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:37,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1296737235, now seen corresponding path program 6 times [2022-07-14 05:59:37,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:37,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422791661] [2022-07-14 05:59:37,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:37,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 05:59:37,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422791661] [2022-07-14 05:59:37,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422791661] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:37,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818783573] [2022-07-14 05:59:37,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 05:59:37,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:37,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:37,536 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 05:59:37,537 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 05:59:37,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-14 05:59:37,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:37,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-14 05:59:37,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 05:59:37,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:38,025 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 05:59:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 05:59:38,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818783573] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:38,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:38,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-07-14 05:59:38,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972419496] [2022-07-14 05:59:38,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:38,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 05:59:38,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:38,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 05:59:38,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-07-14 05:59:38,050 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 32 states, 31 states have (on average 5.129032258064516) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:38,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:38,399 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2022-07-14 05:59:38,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-14 05:59:38,399 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.129032258064516) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2022-07-14 05:59:38,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:38,400 INFO L225 Difference]: With dead ends: 96 [2022-07-14 05:59:38,400 INFO L226 Difference]: Without dead ends: 92 [2022-07-14 05:59:38,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 05:59:38,401 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 424 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:38,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 325 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:59:38,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-14 05:59:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2022-07-14 05:59:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states 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 05:59:38,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-07-14 05:59:38,411 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 76 [2022-07-14 05:59:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:38,411 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-07-14 05:59:38,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.129032258064516) internal successors, (159), 32 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-07-14 05:59:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-14 05:59:38,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:38,412 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:38,438 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 05:59:38,637 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 05:59:38,638 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:38,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:38,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2131874765, now seen corresponding path program 5 times [2022-07-14 05:59:38,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:38,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804887671] [2022-07-14 05:59:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:38,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 05:59:38,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804887671] [2022-07-14 05:59:38,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804887671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701263663] [2022-07-14 05:59:38,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 05:59:38,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:38,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:38,858 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 05:59:38,860 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 05:59:38,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 05:59:38,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:38,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 05:59:38,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:39,083 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 05:59:39,562 INFO L356 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-07-14 05:59:39,562 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 33 treesize of output 26 [2022-07-14 05:59:39,597 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 5 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 05:59:39,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:40,050 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:40,050 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 91 treesize of output 91 [2022-07-14 05:59:40,080 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 36 treesize of output 32 [2022-07-14 05:59:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 5 proven. 98 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 05:59:40,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701263663] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:40,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:40,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 48 [2022-07-14 05:59:40,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265303580] [2022-07-14 05:59:40,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:40,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-14 05:59:40,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:40,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-14 05:59:40,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2123, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 05:59:40,213 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 05:59:41,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:41,412 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2022-07-14 05:59:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-14 05:59:41,412 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 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 05:59:41,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:41,412 INFO L225 Difference]: With dead ends: 235 [2022-07-14 05:59:41,412 INFO L226 Difference]: Without dead ends: 104 [2022-07-14 05:59:41,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 125 SyntacticMatches, 9 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=371, Invalid=5791, Unknown=0, NotChecked=0, Total=6162 [2022-07-14 05:59:41,414 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 81 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 483 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:41,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 967 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 907 Invalid, 0 Unknown, 483 Unchecked, 0.3s Time] [2022-07-14 05:59:41,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-14 05:59:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2022-07-14 05:59:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 97 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2022-07-14 05:59:41,416 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 79 [2022-07-14 05:59:41,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:41,417 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2022-07-14 05:59:41,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5416666666666665) internal successors, (170), 48 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 05:59:41,417 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2022-07-14 05:59:41,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-14 05:59:41,417 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:41,417 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:41,434 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 05:59:41,632 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 05:59:41,632 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:41,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:41,632 INFO L85 PathProgramCache]: Analyzing trace with hash -418354157, now seen corresponding path program 6 times [2022-07-14 05:59:41,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:41,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073240990] [2022-07-14 05:59:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:41,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 05:59:41,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073240990] [2022-07-14 05:59:41,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073240990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:41,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218557432] [2022-07-14 05:59:41,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 05:59:41,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:41,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:41,793 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 05:59:41,794 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 05:59:41,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 05:59:41,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 05:59:41,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 05:59:42,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:42,427 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 05:59:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 05:59:42,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218557432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:42,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:42,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-07-14 05:59:42,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148784953] [2022-07-14 05:59:42,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:42,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-14 05:59:42,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:42,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-14 05:59:42,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 05:59:42,471 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 37 states, 36 states have (on average 4.916666666666667) internal successors, (177), 37 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 05:59:42,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:42,761 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2022-07-14 05:59:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 05:59:42,762 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.916666666666667) internal successors, (177), 37 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-14 05:59:42,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:42,762 INFO L225 Difference]: With dead ends: 113 [2022-07-14 05:59:42,762 INFO L226 Difference]: Without dead ends: 113 [2022-07-14 05:59:42,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 05:59:42,763 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 610 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:42,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 296 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:59:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-14 05:59:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2022-07-14 05:59:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 05:59:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-07-14 05:59:42,765 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 87 [2022-07-14 05:59:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:42,765 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-07-14 05:59:42,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.916666666666667) internal successors, (177), 37 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 05:59:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-07-14 05:59:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-14 05:59:42,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:42,766 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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 05:59:42,784 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 05:59:42,966 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 05:59:42,967 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:42,967 INFO L85 PathProgramCache]: Analyzing trace with hash -771190887, now seen corresponding path program 7 times [2022-07-14 05:59:42,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:42,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554889375] [2022-07-14 05:59:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:42,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 15 proven. 125 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 05:59:43,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:43,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554889375] [2022-07-14 05:59:43,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554889375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:43,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819375946] [2022-07-14 05:59:43,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 05:59:43,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:43,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:43,117 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 05:59:43,118 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 05:59:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:43,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 05:59:43,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 05:59:43,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:43,635 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 05:59:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 05:59:43,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819375946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:43,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:43,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2022-07-14 05:59:43,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693859884] [2022-07-14 05:59:43,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:43,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 05:59:43,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:43,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 05:59:43,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-07-14 05:59:43,663 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 05:59:44,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:44,083 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2022-07-14 05:59:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 05:59:44,083 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-14 05:59:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:44,083 INFO L225 Difference]: With dead ends: 111 [2022-07-14 05:59:44,084 INFO L226 Difference]: Without dead ends: 107 [2022-07-14 05:59:44,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=1529, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 05:59:44,084 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 443 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:44,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 375 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:59:44,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-14 05:59:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-07-14 05:59:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 102 states have (on average 1.0490196078431373) internal successors, (107), 104 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-07-14 05:59:44,086 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 91 [2022-07-14 05:59:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:44,087 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-07-14 05:59:44,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 05:59:44,087 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-07-14 05:59:44,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-14 05:59:44,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:44,087 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:44,106 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 05:59:44,303 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 05:59:44,303 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:44,304 INFO L85 PathProgramCache]: Analyzing trace with hash -767633183, now seen corresponding path program 7 times [2022-07-14 05:59:44,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:44,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466563742] [2022-07-14 05:59:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:44,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 05:59:44,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:44,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466563742] [2022-07-14 05:59:44,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466563742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:44,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928141688] [2022-07-14 05:59:44,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 05:59:44,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:44,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:44,527 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 05:59:44,529 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 05:59:44,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-14 05:59:44,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:44,792 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 05:59:45,360 INFO L356 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-07-14 05:59:45,361 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 33 treesize of output 26 [2022-07-14 05:59:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 05:59:45,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:45,980 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:45,980 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 91 treesize of output 91 [2022-07-14 05:59:46,004 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 36 treesize of output 32 [2022-07-14 05:59:46,151 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 05:59:46,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928141688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:46,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:46,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23, 23] total 53 [2022-07-14 05:59:46,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610133136] [2022-07-14 05:59:46,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:46,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-14 05:59:46,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:46,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-14 05:59:46,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2611, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 05:59:46,153 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 53 states, 53 states have (on average 3.7547169811320753) internal successors, (199), 53 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 05:59:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:47,532 INFO L93 Difference]: Finished difference Result 275 states and 278 transitions. [2022-07-14 05:59:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-14 05:59:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.7547169811320753) internal successors, (199), 53 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 94 [2022-07-14 05:59:47,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:47,534 INFO L225 Difference]: With dead ends: 275 [2022-07-14 05:59:47,534 INFO L226 Difference]: Without dead ends: 119 [2022-07-14 05:59:47,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 152 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=388, Invalid=6922, Unknown=0, NotChecked=0, Total=7310 [2022-07-14 05:59:47,536 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 97 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 498 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:47,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1214 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1038 Invalid, 0 Unknown, 498 Unchecked, 0.3s Time] [2022-07-14 05:59:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-14 05:59:47,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2022-07-14 05:59:47,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:47,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2022-07-14 05:59:47,537 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 94 [2022-07-14 05:59:47,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:47,538 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2022-07-14 05:59:47,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.7547169811320753) internal successors, (199), 53 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 05:59:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2022-07-14 05:59:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-07-14 05:59:47,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:47,539 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:47,555 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 05:59:47,755 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 05:59:47,756 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:47,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash 913329115, now seen corresponding path program 8 times [2022-07-14 05:59:47,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:47,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430073080] [2022-07-14 05:59:47,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:47,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:47,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 28 proven. 149 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 05:59:47,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430073080] [2022-07-14 05:59:47,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430073080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:47,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958319886] [2022-07-14 05:59:47,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:59:47,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:47,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:47,937 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 05:59:47,939 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 05:59:48,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:59:48,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-14 05:59:48,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:48,297 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 05:59:48,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:48,534 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 05:59:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 05:59:48,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958319886] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:48,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:48,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2022-07-14 05:59:48,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888973702] [2022-07-14 05:59:48,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:48,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 05:59:48,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:48,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 05:59:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 05:59:48,587 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 36 states, 35 states have (on average 4.857142857142857) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 05:59:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:48,924 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2022-07-14 05:59:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 05:59:48,924 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.857142857142857) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 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 05:59:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:48,925 INFO L225 Difference]: With dead ends: 128 [2022-07-14 05:59:48,925 INFO L226 Difference]: Without dead ends: 128 [2022-07-14 05:59:48,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1668, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 05:59:48,926 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 563 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:48,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 397 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:59:48,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-14 05:59:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2022-07-14 05:59:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 115 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2022-07-14 05:59:48,928 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 102 [2022-07-14 05:59:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:48,928 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2022-07-14 05:59:48,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.857142857142857) internal successors, (170), 36 states have internal predecessors, (170), 0 states have call successors, (0), 0 states 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 05:59:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2022-07-14 05:59:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-14 05:59:48,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:48,929 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 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 05:59:48,946 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 05:59:49,146 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 05:59:49,146 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:49,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1419555999, now seen corresponding path program 8 times [2022-07-14 05:59:49,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:49,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191807588] [2022-07-14 05:59:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:49,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 28 proven. 173 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 05:59:49,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:49,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191807588] [2022-07-14 05:59:49,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191807588] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:49,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866018578] [2022-07-14 05:59:49,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 05:59:49,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:49,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:49,355 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 05:59:49,357 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 05:59:49,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 05:59:49,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:49,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-14 05:59:49,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:49,736 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 45 proven. 156 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 05:59:49,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:49,981 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 05:59:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 45 proven. 156 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 05:59:50,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866018578] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:50,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:50,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2022-07-14 05:59:50,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854796414] [2022-07-14 05:59:50,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:50,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 05:59:50,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:50,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 05:59:50,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 05:59:50,015 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand has 36 states, 35 states have (on average 5.057142857142857) internal successors, (177), 36 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 05:59:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:50,544 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2022-07-14 05:59:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 05:59:50,544 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.057142857142857) internal successors, (177), 36 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2022-07-14 05:59:50,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:50,545 INFO L225 Difference]: With dead ends: 126 [2022-07-14 05:59:50,545 INFO L226 Difference]: Without dead ends: 122 [2022-07-14 05:59:50,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=463, Invalid=1987, Unknown=0, NotChecked=0, Total=2450 [2022-07-14 05:59:50,546 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 421 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:50,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 473 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 05:59:50,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-14 05:59:50,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2022-07-14 05:59:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 119 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-07-14 05:59:50,547 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 106 [2022-07-14 05:59:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:50,548 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-07-14 05:59:50,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.057142857142857) internal successors, (177), 36 states have internal predecessors, (177), 0 states have call successors, (0), 0 states 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 05:59:50,548 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-07-14 05:59:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-14 05:59:50,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:50,549 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:50,566 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 05:59:50,763 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 05:59:50,763 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:50,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1744754663, now seen corresponding path program 9 times [2022-07-14 05:59:50,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:50,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119968706] [2022-07-14 05:59:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:50,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 05:59:51,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:51,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119968706] [2022-07-14 05:59:51,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119968706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:51,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34246198] [2022-07-14 05:59:51,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 05:59:51,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:51,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:51,068 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 05:59:51,068 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 05:59:51,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-14 05:59:51,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:51,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-14 05:59:51,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:51,530 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 05:59:52,188 INFO L356 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-07-14 05:59:52,188 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 33 treesize of output 26 [2022-07-14 05:59:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 7 proven. 213 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 05:59:52,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:52,939 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:52,939 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 91 treesize of output 91 [2022-07-14 05:59:52,976 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 36 treesize of output 32 [2022-07-14 05:59:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 7 proven. 213 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 05:59:53,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34246198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:53,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:53,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 25] total 58 [2022-07-14 05:59:53,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877044461] [2022-07-14 05:59:53,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:53,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-14 05:59:53,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:53,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-14 05:59:53,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3149, Unknown=0, NotChecked=0, Total=3306 [2022-07-14 05:59:53,177 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 58 states, 58 states have (on average 3.9310344827586206) internal successors, (228), 58 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 05:59:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 05:59:54,954 INFO L93 Difference]: Finished difference Result 315 states and 318 transitions. [2022-07-14 05:59:54,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-14 05:59:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.9310344827586206) internal successors, (228), 58 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-14 05:59:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 05:59:54,955 INFO L225 Difference]: With dead ends: 315 [2022-07-14 05:59:54,955 INFO L226 Difference]: Without dead ends: 134 [2022-07-14 05:59:54,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 177 SyntacticMatches, 13 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=429, Invalid=8501, Unknown=0, NotChecked=0, Total=8930 [2022-07-14 05:59:54,957 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 94 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1536 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 577 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 05:59:54,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1536 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1446 Invalid, 0 Unknown, 577 Unchecked, 0.5s Time] [2022-07-14 05:59:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-14 05:59:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2022-07-14 05:59:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 125 states have (on average 1.04) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 05:59:54,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-07-14 05:59:54,959 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 109 [2022-07-14 05:59:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 05:59:54,960 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-07-14 05:59:54,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.9310344827586206) internal successors, (228), 58 states have internal predecessors, (228), 0 states have call successors, (0), 0 states 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 05:59:54,960 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-07-14 05:59:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-14 05:59:54,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 05:59:54,961 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 05:59:54,984 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 05:59:55,167 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 05:59:55,168 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 05:59:55,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 05:59:55,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1230781985, now seen corresponding path program 10 times [2022-07-14 05:59:55,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 05:59:55,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147150446] [2022-07-14 05:59:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 05:59:55,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 05:59:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 05:59:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 45 proven. 200 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 05:59:55,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 05:59:55,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147150446] [2022-07-14 05:59:55,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147150446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 05:59:55,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783396110] [2022-07-14 05:59:55,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 05:59:55,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 05:59:55,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 05:59:55,424 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 05:59:55,425 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 05:59:55,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 05:59:55,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 05:59:55,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-14 05:59:55,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 05:59:55,580 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 05:59:55,583 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 05:59:56,026 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 05:59:56,065 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 05:59:56,512 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:56,512 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 19 treesize of output 19 [2022-07-14 05:59:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 72 proven. 173 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 05:59:56,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 05:59:57,321 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcmp_~s1#1.offset_133| Int) (v_ArrVal_1122 (Array Int Int))) (or (<= (+ |v_ULTIMATE.start_cstrcmp_~s1#1.offset_133| 8) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1122) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_133|)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcmp_~s1#1.offset_133|) (not (<= 0 |v_ULTIMATE.start_cstrcmp_~s1#1.offset_133|)))) is different from false [2022-07-14 05:59:57,335 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:57,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 05:59:57,342 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 05:59:57,344 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 05:59:57,348 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 05:59:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 91 proven. 154 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 05:59:58,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783396110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 05:59:58,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 05:59:58,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23, 23] total 62 [2022-07-14 05:59:58,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544777880] [2022-07-14 05:59:58,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 05:59:58,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-14 05:59:58,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 05:59:58,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-14 05:59:58,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=3376, Unknown=1, NotChecked=120, Total=3906 [2022-07-14 05:59:58,742 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 63 states, 62 states have (on average 4.370967741935484) internal successors, (271), 63 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 06:00:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:00,183 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2022-07-14 06:00:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:00:00,183 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.370967741935484) internal successors, (271), 63 states have internal predecessors, (271), 0 states have call successors, (0), 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 117 [2022-07-14 06:00:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:00,184 INFO L225 Difference]: With dead ends: 156 [2022-07-14 06:00:00,184 INFO L226 Difference]: Without dead ends: 156 [2022-07-14 06:00:00,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 198 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1125, Invalid=5520, Unknown=1, NotChecked=160, Total=6806 [2022-07-14 06:00:00,185 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1323 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:00,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 863 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1571 Invalid, 0 Unknown, 152 Unchecked, 0.6s Time] [2022-07-14 06:00:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-14 06:00:00,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 138. [2022-07-14 06:00:00,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.0518518518518518) internal successors, (142), 137 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 06:00:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-07-14 06:00:00,187 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 117 [2022-07-14 06:00:00,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:00,187 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-07-14 06:00:00,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.370967741935484) internal successors, (271), 63 states have internal predecessors, (271), 0 states have call successors, (0), 0 states 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 06:00:00,187 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-07-14 06:00:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-14 06:00:00,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:00,188 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 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 06:00:00,205 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-14 06:00:00,399 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 06:00:00,399 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:00,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1495539557, now seen corresponding path program 9 times [2022-07-14 06:00:00,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:00,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670759040] [2022-07-14 06:00:00,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:00,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:00:00,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:00,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670759040] [2022-07-14 06:00:00,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670759040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:00,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218003990] [2022-07-14 06:00:00,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:00:00,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:00,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:00,616 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 06:00:00,616 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 06:00:00,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-14 06:00:00,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:00,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-14 06:00:00,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:00:01,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:01,584 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 06:00:01,623 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:00:01,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218003990] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:01,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:01,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2022-07-14 06:00:01,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760592098] [2022-07-14 06:00:01,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:01,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-14 06:00:01,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:01,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-14 06:00:01,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2022-07-14 06:00:01,625 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 47 states, 46 states have (on average 5.3478260869565215) internal successors, (246), 47 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 06:00:02,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:02,278 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2022-07-14 06:00:02,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:00:02,279 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 5.3478260869565215) internal successors, (246), 47 states have internal predecessors, (246), 0 states have call successors, (0), 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 06:00:02,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:02,279 INFO L225 Difference]: With dead ends: 142 [2022-07-14 06:00:02,280 INFO L226 Difference]: Without dead ends: 138 [2022-07-14 06:00:02,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=746, Invalid=3160, Unknown=0, NotChecked=0, Total=3906 [2022-07-14 06:00:02,281 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 642 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:02,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 482 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:00:02,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-14 06:00:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-07-14 06:00:02,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.037037037037037) internal successors, (140), 137 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 06:00:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2022-07-14 06:00:02,283 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 121 [2022-07-14 06:00:02,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:02,284 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2022-07-14 06:00:02,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 5.3478260869565215) internal successors, (246), 47 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 06:00:02,284 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2022-07-14 06:00:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-14 06:00:02,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:02,285 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:02,311 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 06:00:02,499 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 06:00:02,499 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:02,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1467824155, now seen corresponding path program 10 times [2022-07-14 06:00:02,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:02,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172030772] [2022-07-14 06:00:02,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:02,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:02,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 186 proven. 141 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:00:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:02,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172030772] [2022-07-14 06:00:02,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172030772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:02,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034639703] [2022-07-14 06:00:02,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:00:02,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:02,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:02,719 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 06:00:02,720 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 06:00:02,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:00:02,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:02,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:00:02,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:02,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:00:02,870 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 06:00:02,872 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 06:00:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 236 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:00:03,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 228 proven. 99 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:00:03,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034639703] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:03,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:03,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2022-07-14 06:00:03,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666841839] [2022-07-14 06:00:03,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:03,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 06:00:03,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:03,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 06:00:03,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=1909, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:00:03,779 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 49 states, 49 states have (on average 4.836734693877551) internal successors, (237), 49 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:00:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:04,155 INFO L93 Difference]: Finished difference Result 235 states and 238 transitions. [2022-07-14 06:00:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:00:04,156 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.836734693877551) internal successors, (237), 49 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2022-07-14 06:00:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:04,156 INFO L225 Difference]: With dead ends: 235 [2022-07-14 06:00:04,156 INFO L226 Difference]: Without dead ends: 145 [2022-07-14 06:00:04,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=730, Invalid=2692, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:00:04,157 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 136 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:04,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 413 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:00:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-14 06:00:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2022-07-14 06:00:04,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 139 states have (on average 1.0359712230215827) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 06:00:04,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-07-14 06:00:04,159 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 128 [2022-07-14 06:00:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:04,160 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-07-14 06:00:04,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.836734693877551) internal successors, (237), 49 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:00:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-07-14 06:00:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-14 06:00:04,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:04,161 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 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 06:00:04,179 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 06:00:04,378 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 06:00:04,379 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:04,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:04,379 INFO L85 PathProgramCache]: Analyzing trace with hash -252767432, now seen corresponding path program 11 times [2022-07-14 06:00:04,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:04,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694374618] [2022-07-14 06:00:04,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:04,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:04,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 16 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:00:05,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:05,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694374618] [2022-07-14 06:00:05,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694374618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:05,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851421906] [2022-07-14 06:00:05,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:00:05,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:05,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:05,313 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 06:00:05,314 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 06:00:05,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-14 06:00:05,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:05,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-14 06:00:05,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:06,005 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 06:00:07,046 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-14 06:00:07,047 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 33 treesize of output 30 [2022-07-14 06:00:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 40 proven. 287 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:00:07,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:08,213 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:00:08,214 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 91 treesize of output 91 [2022-07-14 06:00:08,245 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 36 treesize of output 32 [2022-07-14 06:00:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 40 proven. 287 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:00:08,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851421906] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:08,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:08,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 27, 27] total 75 [2022-07-14 06:00:08,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116581896] [2022-07-14 06:00:08,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:08,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-14 06:00:08,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-14 06:00:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=5345, Unknown=0, NotChecked=0, Total=5550 [2022-07-14 06:00:08,530 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 06:00:13,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:13,113 INFO L93 Difference]: Finished difference Result 314 states and 318 transitions. [2022-07-14 06:00:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-07-14 06:00:13,114 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 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 132 [2022-07-14 06:00:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:13,115 INFO L225 Difference]: With dead ends: 314 [2022-07-14 06:00:13,115 INFO L226 Difference]: Without dead ends: 196 [2022-07-14 06:00:13,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 221 SyntacticMatches, 12 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 3345 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=684, Invalid=15828, Unknown=0, NotChecked=0, Total=16512 [2022-07-14 06:00:13,117 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 208 mSDsluCounter, 2293 mSDsCounter, 0 mSdLazyCounter, 2321 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 3236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 823 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:13,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 2342 Invalid, 3236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2321 Invalid, 0 Unknown, 823 Unchecked, 1.0s Time] [2022-07-14 06:00:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-14 06:00:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 146. [2022-07-14 06:00:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 143 states have (on average 1.034965034965035) internal successors, (148), 145 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 06:00:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2022-07-14 06:00:13,121 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 132 [2022-07-14 06:00:13,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:13,121 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2022-07-14 06:00:13,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.8933333333333335) internal successors, (292), 75 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 06:00:13,121 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2022-07-14 06:00:13,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-14 06:00:13,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:13,122 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:13,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-14 06:00:13,340 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 06:00:13,340 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1652436117, now seen corresponding path program 12 times [2022-07-14 06:00:13,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:13,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94899003] [2022-07-14 06:00:13,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:13,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 66 proven. 290 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:00:13,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:13,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94899003] [2022-07-14 06:00:13,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94899003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:13,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012407326] [2022-07-14 06:00:13,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:00:13,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:13,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:13,601 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 06:00:13,602 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 06:00:14,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-14 06:00:14,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:14,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-14 06:00:14,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:14,237 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:00:14,237 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 06:00:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 91 proven. 265 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:00:14,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 120 proven. 236 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:00:15,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012407326] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:15,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:15,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 60 [2022-07-14 06:00:15,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357677636] [2022-07-14 06:00:15,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:15,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-14 06:00:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:15,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-14 06:00:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=3179, Unknown=0, NotChecked=0, Total=3660 [2022-07-14 06:00:15,839 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand has 61 states, 60 states have (on average 5.266666666666667) internal successors, (316), 61 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 06:00:16,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:16,741 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2022-07-14 06:00:16,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-14 06:00:16,742 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 5.266666666666667) internal successors, (316), 61 states have internal predecessors, (316), 0 states have call successors, (0), 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 136 [2022-07-14 06:00:16,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:16,743 INFO L225 Difference]: With dead ends: 156 [2022-07-14 06:00:16,743 INFO L226 Difference]: Without dead ends: 152 [2022-07-14 06:00:16,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1187, Invalid=4975, Unknown=0, NotChecked=0, Total=6162 [2022-07-14 06:00:16,743 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 927 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:16,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [927 Valid, 621 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:00:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-14 06:00:16,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2022-07-14 06:00:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 147 states have (on average 1.034013605442177) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 0 states 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 06:00:16,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2022-07-14 06:00:16,745 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 136 [2022-07-14 06:00:16,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:16,746 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2022-07-14 06:00:16,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 5.266666666666667) internal successors, (316), 61 states have internal predecessors, (316), 0 states have call successors, (0), 0 states 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 06:00:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2022-07-14 06:00:16,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-14 06:00:16,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:16,747 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:16,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-14 06:00:16,967 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 06:00:16,967 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1190770075, now seen corresponding path program 11 times [2022-07-14 06:00:16,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:16,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652058984] [2022-07-14 06:00:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:16,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 41 proven. 340 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:00:17,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:17,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652058984] [2022-07-14 06:00:17,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652058984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:17,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719185695] [2022-07-14 06:00:17,335 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:00:17,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:17,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:17,337 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 06:00:17,338 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 06:00:17,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-14 06:00:17,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:17,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-14 06:00:17,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:18,032 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 06:00:19,003 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-14 06:00:19,004 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 33 treesize of output 30 [2022-07-14 06:00:19,047 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 372 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:00:19,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:20,094 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:00:20,095 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 91 treesize of output 91 [2022-07-14 06:00:20,126 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 36 treesize of output 32 [2022-07-14 06:00:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 372 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:00:20,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719185695] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:20,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:20,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29, 29] total 68 [2022-07-14 06:00:20,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692379729] [2022-07-14 06:00:20,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:20,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-14 06:00:20,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-14 06:00:20,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4375, Unknown=0, NotChecked=0, Total=4556 [2022-07-14 06:00:20,407 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 68 states, 68 states have (on average 4.205882352941177) internal successors, (286), 68 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 06:00:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:23,604 INFO L93 Difference]: Finished difference Result 395 states and 398 transitions. [2022-07-14 06:00:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-14 06:00:23,605 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.205882352941177) internal successors, (286), 68 states have internal predecessors, (286), 0 states have call successors, (0), 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 139 [2022-07-14 06:00:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:23,605 INFO L225 Difference]: With dead ends: 395 [2022-07-14 06:00:23,606 INFO L226 Difference]: Without dead ends: 164 [2022-07-14 06:00:23,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 231 SyntacticMatches, 15 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=508, Invalid=12374, Unknown=0, NotChecked=0, Total=12882 [2022-07-14 06:00:23,607 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 119 mSDsluCounter, 2395 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 2447 SdHoareTripleChecker+Invalid, 3394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1110 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:23,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 2447 Invalid, 3394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2242 Invalid, 0 Unknown, 1110 Unchecked, 0.9s Time] [2022-07-14 06:00:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-14 06:00:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2022-07-14 06:00:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 155 states have (on average 1.032258064516129) internal successors, (160), 157 states have internal predecessors, (160), 0 states have call successors, (0), 0 states 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 06:00:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 160 transitions. [2022-07-14 06:00:23,610 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 160 transitions. Word has length 139 [2022-07-14 06:00:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:23,610 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 160 transitions. [2022-07-14 06:00:23,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.205882352941177) internal successors, (286), 68 states have internal predecessors, (286), 0 states have call successors, (0), 0 states 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 06:00:23,611 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 160 transitions. [2022-07-14 06:00:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-14 06:00:23,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:23,612 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:23,639 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 06:00:23,825 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 06:00:23,826 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2139702699, now seen corresponding path program 12 times [2022-07-14 06:00:23,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:23,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138291272] [2022-07-14 06:00:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:23,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:23,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 91 proven. 323 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:00:24,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:24,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138291272] [2022-07-14 06:00:24,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138291272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:24,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120466646] [2022-07-14 06:00:24,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:00:24,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:24,092 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 06:00:24,093 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 06:00:25,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-14 06:00:25,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:25,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:00:25,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:25,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:00:25,077 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 06:00:25,079 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 06:00:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:00:25,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 153 proven. 261 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:00:26,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120466646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:26,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:26,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2022-07-14 06:00:26,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606417262] [2022-07-14 06:00:26,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:26,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-14 06:00:26,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-14 06:00:26,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=3661, Unknown=0, NotChecked=0, Total=4160 [2022-07-14 06:00:26,790 INFO L87 Difference]: Start difference. First operand 158 states and 160 transitions. Second operand has 65 states, 64 states have (on average 5.265625) internal successors, (337), 65 states have internal predecessors, (337), 0 states have call successors, (0), 0 states 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 06:00:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:27,742 INFO L93 Difference]: Finished difference Result 173 states and 175 transitions. [2022-07-14 06:00:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:00:27,742 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 5.265625) internal successors, (337), 65 states have internal predecessors, (337), 0 states have call successors, (0), 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 147 [2022-07-14 06:00:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:27,743 INFO L225 Difference]: With dead ends: 173 [2022-07-14 06:00:27,743 INFO L226 Difference]: Without dead ends: 173 [2022-07-14 06:00:27,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1311, Invalid=5999, Unknown=0, NotChecked=0, Total=7310 [2022-07-14 06:00:27,744 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1243 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:27,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1243 Valid, 607 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:00:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-14 06:00:27,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2022-07-14 06:00:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 158 states have (on average 1.0316455696202531) internal successors, (163), 160 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:00:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2022-07-14 06:00:27,746 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 147 [2022-07-14 06:00:27,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:27,746 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2022-07-14 06:00:27,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 5.265625) internal successors, (337), 65 states have internal predecessors, (337), 0 states have call successors, (0), 0 states 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 06:00:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2022-07-14 06:00:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-14 06:00:27,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:27,747 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:27,766 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 06:00:27,965 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 06:00:27,966 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:27,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:27,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1758125361, now seen corresponding path program 13 times [2022-07-14 06:00:27,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:27,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312296775] [2022-07-14 06:00:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:27,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 91 proven. 359 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:00:28,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:28,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312296775] [2022-07-14 06:00:28,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312296775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:28,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100326768] [2022-07-14 06:00:28,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:00:28,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:28,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:28,263 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 06:00:28,264 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 06:00:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:28,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-14 06:00:28,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:28,834 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:00:28,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:29,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:00:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 120 proven. 330 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:00:29,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100326768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:29,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:29,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2022-07-14 06:00:29,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75848080] [2022-07-14 06:00:29,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:29,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-14 06:00:29,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:29,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-14 06:00:29,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2021, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 06:00:29,296 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 48 states, 47 states have (on average 5.170212765957447) internal successors, (243), 48 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 06:00:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:30,237 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2022-07-14 06:00:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:00:30,238 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.170212765957447) internal successors, (243), 48 states have internal predecessors, (243), 0 states have call successors, (0), 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 151 [2022-07-14 06:00:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:30,239 INFO L225 Difference]: With dead ends: 171 [2022-07-14 06:00:30,239 INFO L226 Difference]: Without dead ends: 167 [2022-07-14 06:00:30,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 274 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=841, Invalid=3715, Unknown=0, NotChecked=0, Total=4556 [2022-07-14 06:00:30,239 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 939 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:30,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [939 Valid, 847 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:00:30,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-14 06:00:30,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2022-07-14 06:00:30,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 162 states have (on average 1.0308641975308641) internal successors, (167), 164 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 06:00:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2022-07-14 06:00:30,242 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 151 [2022-07-14 06:00:30,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:30,242 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2022-07-14 06:00:30,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.170212765957447) internal successors, (243), 48 states have internal predecessors, (243), 0 states have call successors, (0), 0 states 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 06:00:30,243 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2022-07-14 06:00:30,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-07-14 06:00:30,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:30,244 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:30,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-14 06:00:30,447 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 06:00:30,448 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:30,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:30,448 INFO L85 PathProgramCache]: Analyzing trace with hash -813530039, now seen corresponding path program 13 times [2022-07-14 06:00:30,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:30,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281621391] [2022-07-14 06:00:30,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:30,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 46 proven. 432 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:00:30,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:30,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281621391] [2022-07-14 06:00:30,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281621391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:30,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264052133] [2022-07-14 06:00:30,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:00:30,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:30,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:30,895 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 06:00:30,896 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 06:00:31,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:31,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-14 06:00:31,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:31,333 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 06:00:32,459 INFO L356 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2022-07-14 06:00:32,459 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 33 treesize of output 30 [2022-07-14 06:00:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 10 proven. 468 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:00:32,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:33,535 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:00:33,536 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 91 treesize of output 91 [2022-07-14 06:00:33,559 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 36 treesize of output 32 [2022-07-14 06:00:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 10 proven. 468 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-14 06:00:33,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264052133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:33,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:33,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31, 31] total 73 [2022-07-14 06:00:33,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775745545] [2022-07-14 06:00:33,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:33,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-14 06:00:33,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:33,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-14 06:00:33,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=5063, Unknown=0, NotChecked=0, Total=5256 [2022-07-14 06:00:33,789 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 73 states, 73 states have (on average 4.315068493150685) internal successors, (315), 73 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 06:00:36,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:36,897 INFO L93 Difference]: Finished difference Result 435 states and 438 transitions. [2022-07-14 06:00:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-14 06:00:36,898 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.315068493150685) internal successors, (315), 73 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2022-07-14 06:00:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:36,898 INFO L225 Difference]: With dead ends: 435 [2022-07-14 06:00:36,898 INFO L226 Difference]: Without dead ends: 179 [2022-07-14 06:00:36,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 260 SyntacticMatches, 14 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 11 DeprecatedPredicates, 3064 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=567, Invalid=14933, Unknown=0, NotChecked=0, Total=15500 [2022-07-14 06:00:36,900 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 122 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 2892 SdHoareTripleChecker+Invalid, 4170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1331 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:36,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 2892 Invalid, 4170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2796 Invalid, 0 Unknown, 1331 Unchecked, 0.8s Time] [2022-07-14 06:00:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-14 06:00:36,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 173. [2022-07-14 06:00:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 170 states have (on average 1.0294117647058822) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 0 states 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 06:00:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2022-07-14 06:00:36,902 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 154 [2022-07-14 06:00:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:36,903 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2022-07-14 06:00:36,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.315068493150685) internal successors, (315), 73 states have internal predecessors, (315), 0 states have call successors, (0), 0 states 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 06:00:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2022-07-14 06:00:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-14 06:00:36,904 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:36,904 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:36,926 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 06:00:37,115 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 06:00:37,115 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:37,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:37,116 INFO L85 PathProgramCache]: Analyzing trace with hash -160615357, now seen corresponding path program 14 times [2022-07-14 06:00:37,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:37,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543327455] [2022-07-14 06:00:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:37,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:37,411 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 120 proven. 395 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-14 06:00:37,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:37,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543327455] [2022-07-14 06:00:37,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543327455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:37,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880891584] [2022-07-14 06:00:37,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:00:37,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:37,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:37,412 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 06:00:37,413 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 06:00:37,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:00:37,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:37,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-14 06:00:37,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-14 06:00:38,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:38,466 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 06:00:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-14 06:00:38,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880891584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:38,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:38,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 51 [2022-07-14 06:00:38,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892163247] [2022-07-14 06:00:38,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:38,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 06:00:38,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:38,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 06:00:38,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=2326, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 06:00:38,552 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 52 states, 51 states have (on average 5.0588235294117645) internal successors, (258), 52 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 06:00:39,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:39,335 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2022-07-14 06:00:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:00:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 5.0588235294117645) internal successors, (258), 52 states have internal predecessors, (258), 0 states have call successors, (0), 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 162 [2022-07-14 06:00:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:39,336 INFO L225 Difference]: With dead ends: 188 [2022-07-14 06:00:39,336 INFO L226 Difference]: Without dead ends: 188 [2022-07-14 06:00:39,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=804, Invalid=3486, Unknown=0, NotChecked=0, Total=4290 [2022-07-14 06:00:39,338 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 1405 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1405 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:39,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1405 Valid, 822 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:00:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-14 06:00:39,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 176. [2022-07-14 06:00:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 173 states have (on average 1.0289017341040463) internal successors, (178), 175 states have internal predecessors, (178), 0 states have call successors, (0), 0 states 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 06:00:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2022-07-14 06:00:39,341 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 162 [2022-07-14 06:00:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:39,341 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2022-07-14 06:00:39,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 5.0588235294117645) internal successors, (258), 52 states have internal predecessors, (258), 0 states have call successors, (0), 0 states 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 06:00:39,341 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2022-07-14 06:00:39,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-14 06:00:39,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:39,342 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:39,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-14 06:00:39,555 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 06:00:39,555 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:39,556 INFO L85 PathProgramCache]: Analyzing trace with hash -664420407, now seen corresponding path program 14 times [2022-07-14 06:00:39,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:39,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745954794] [2022-07-14 06:00:39,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:39,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 120 proven. 435 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-14 06:00:39,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:39,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745954794] [2022-07-14 06:00:39,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745954794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:39,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375753525] [2022-07-14 06:00:39,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:00:39,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:39,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:39,879 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 06:00:39,880 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 06:00:40,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:00:40,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:40,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-14 06:00:40,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 153 proven. 402 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-14 06:00:40,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:41,002 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 06:00:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 153 proven. 402 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-14 06:00:41,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375753525] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:41,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:41,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 51 [2022-07-14 06:00:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576992204] [2022-07-14 06:00:41,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:41,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-14 06:00:41,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:41,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-14 06:00:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2380, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 06:00:41,062 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 52 states, 51 states have (on average 5.196078431372549) internal successors, (265), 52 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 06:00:42,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:42,079 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2022-07-14 06:00:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:00:42,079 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 5.196078431372549) internal successors, (265), 52 states have internal predecessors, (265), 0 states have call successors, (0), 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 166 [2022-07-14 06:00:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:42,080 INFO L225 Difference]: With dead ends: 186 [2022-07-14 06:00:42,080 INFO L226 Difference]: Without dead ends: 182 [2022-07-14 06:00:42,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 302 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=993, Invalid=4409, Unknown=0, NotChecked=0, Total=5402 [2022-07-14 06:00:42,081 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1098 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:42,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 856 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:00:42,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-14 06:00:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2022-07-14 06:00:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 179 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:00:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 182 transitions. [2022-07-14 06:00:42,085 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 182 transitions. Word has length 166 [2022-07-14 06:00:42,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:42,085 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 182 transitions. [2022-07-14 06:00:42,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 5.196078431372549) internal successors, (265), 52 states have internal predecessors, (265), 0 states have call successors, (0), 0 states 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 06:00:42,086 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 182 transitions. [2022-07-14 06:00:42,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-14 06:00:42,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:42,086 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:42,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-14 06:00:42,307 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 06:00:42,307 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1755937457, now seen corresponding path program 15 times [2022-07-14 06:00:42,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:42,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276278462] [2022-07-14 06:00:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:42,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:42,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 51 proven. 535 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-14 06:00:42,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:42,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276278462] [2022-07-14 06:00:42,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276278462] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:42,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891026678] [2022-07-14 06:00:42,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:00:42,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:42,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:42,767 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 06:00:42,768 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 06:00:44,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-14 06:00:44,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:44,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 115 conjunts are in the unsatisfiable core [2022-07-14 06:00:44,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:45,041 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 06:00:46,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:00:46,366 INFO L356 Elim1Store]: treesize reduction 15, result has 50.0 percent of original size [2022-07-14 06:00:46,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 28 [2022-07-14 06:00:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 11 proven. 764 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:00:46,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:47,842 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:00:47,843 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 91 treesize of output 91 [2022-07-14 06:00:47,855 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 36 treesize of output 32 [2022-07-14 06:00:48,708 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 11 proven. 575 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-07-14 06:00:48,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891026678] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:48,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:48,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 43, 33] total 99 [2022-07-14 06:00:48,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320749059] [2022-07-14 06:00:48,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:48,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-14 06:00:48,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:48,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-14 06:00:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=9430, Unknown=0, NotChecked=0, Total=9702 [2022-07-14 06:00:48,711 INFO L87 Difference]: Start difference. First operand 180 states and 182 transitions. Second operand has 99 states, 99 states have (on average 4.282828282828283) internal successors, (424), 99 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 06:00:53,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:53,501 INFO L93 Difference]: Finished difference Result 475 states and 478 transitions. [2022-07-14 06:00:53,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-14 06:00:53,502 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.282828282828283) internal successors, (424), 99 states have internal predecessors, (424), 0 states have call successors, (0), 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 169 [2022-07-14 06:00:53,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:53,503 INFO L225 Difference]: With dead ends: 475 [2022-07-14 06:00:53,503 INFO L226 Difference]: Without dead ends: 194 [2022-07-14 06:00:53,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=839, Invalid=26221, Unknown=0, NotChecked=0, Total=27060 [2022-07-14 06:00:53,507 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 190 mSDsluCounter, 3837 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 3899 SdHoareTripleChecker+Invalid, 5685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1779 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:53,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 3899 Invalid, 5685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3833 Invalid, 0 Unknown, 1779 Unchecked, 1.3s Time] [2022-07-14 06:00:53,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-14 06:00:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2022-07-14 06:00:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 185 states have (on average 1.027027027027027) internal successors, (190), 187 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 06:00:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2022-07-14 06:00:53,510 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 169 [2022-07-14 06:00:53,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:53,511 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2022-07-14 06:00:53,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.282828282828283) internal successors, (424), 99 states have internal predecessors, (424), 0 states have call successors, (0), 0 states 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 06:00:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2022-07-14 06:00:53,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-14 06:00:53,512 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:53,513 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:53,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-14 06:00:53,735 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 06:00:53,735 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1772013705, now seen corresponding path program 16 times [2022-07-14 06:00:53,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:53,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401048427] [2022-07-14 06:00:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:53,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:00:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:00:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 153 proven. 474 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-14 06:00:54,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:00:54,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401048427] [2022-07-14 06:00:54,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401048427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:00:54,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904651313] [2022-07-14 06:00:54,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:00:54,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:00:54,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:00:54,101 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 06:00:54,102 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 06:00:54,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:00:54,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:00:54,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-14 06:00:54,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:00:54,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:00:54,356 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 06:00:54,666 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 15 treesize of output 11 [2022-07-14 06:00:54,694 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 18 treesize of output 20 [2022-07-14 06:00:55,174 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:00:55,175 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 19 treesize of output 19 [2022-07-14 06:00:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 325 proven. 71 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-07-14 06:00:55,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:00:57,423 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:00:57,424 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-14 06:00:57,429 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:00:57,429 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 06:00:57,433 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 06:00:58,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:00:58,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:00:58,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:00:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 306 proven. 90 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2022-07-14 06:00:58,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904651313] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:00:58,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:00:58,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 20] total 62 [2022-07-14 06:00:58,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390526908] [2022-07-14 06:00:58,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:00:58,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-14 06:00:58,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:00:58,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-14 06:00:58,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=3423, Unknown=1, NotChecked=0, Total=3906 [2022-07-14 06:00:58,256 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 63 states, 62 states have (on average 5.129032258064516) internal successors, (318), 63 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 06:00:59,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:00:59,768 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2022-07-14 06:00:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-14 06:00:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 5.129032258064516) internal successors, (318), 63 states have internal predecessors, (318), 0 states have call successors, (0), 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 177 [2022-07-14 06:00:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:00:59,769 INFO L225 Difference]: With dead ends: 189 [2022-07-14 06:00:59,769 INFO L226 Difference]: Without dead ends: 189 [2022-07-14 06:00:59,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 316 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1553, Invalid=6636, Unknown=1, NotChecked=0, Total=8190 [2022-07-14 06:00:59,770 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 933 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:00:59,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [933 Valid, 993 Invalid, 1899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1544 Invalid, 0 Unknown, 234 Unchecked, 0.6s Time] [2022-07-14 06:00:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-14 06:00:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2022-07-14 06:00:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.0216216216216216) internal successors, (189), 186 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 06:00:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2022-07-14 06:00:59,773 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 177 [2022-07-14 06:00:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:00:59,773 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2022-07-14 06:00:59,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 5.129032258064516) internal successors, (318), 63 states have internal predecessors, (318), 0 states have call successors, (0), 0 states 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 06:00:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2022-07-14 06:00:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-07-14 06:00:59,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:00:59,774 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:00:59,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:00:59,984 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 06:00:59,985 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:00:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:00:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1954739971, now seen corresponding path program 15 times [2022-07-14 06:00:59,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:00:59,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596093867] [2022-07-14 06:00:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:00:59,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 153 proven. 518 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-14 06:01:00,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:00,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596093867] [2022-07-14 06:01:00,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596093867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:00,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307005192] [2022-07-14 06:01:00,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:01:00,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:00,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:00,376 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 06:01:00,377 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 06:01:02,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-07-14 06:01:02,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-14 06:01:02,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:02,084 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 06:01:02,726 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 06:01:02,774 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 06:01:03,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:03,707 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:01:03,708 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-07-14 06:01:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 22 proven. 649 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-14 06:01:03,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:04,406 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2317 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2317) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 11 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:01:04,414 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:01:04,414 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 06:01:04,419 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:01:04,419 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 06:01:04,422 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 06:01:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 22 proven. 649 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-14 06:01:05,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307005192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:05,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:05,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32, 32] total 85 [2022-07-14 06:01:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758437587] [2022-07-14 06:01:05,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:05,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-14 06:01:05,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-14 06:01:05,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=6724, Unknown=1, NotChecked=164, Total=7140 [2022-07-14 06:01:05,366 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 85 states, 85 states have (on average 4.8352941176470585) internal successors, (411), 85 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:09,366 INFO L93 Difference]: Finished difference Result 337 states and 341 transitions. [2022-07-14 06:01:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-14 06:01:09,366 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 4.8352941176470585) internal successors, (411), 85 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2022-07-14 06:01:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:09,368 INFO L225 Difference]: With dead ends: 337 [2022-07-14 06:01:09,368 INFO L226 Difference]: Without dead ends: 203 [2022-07-14 06:01:09,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3696 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1020, Invalid=21035, Unknown=1, NotChecked=294, Total=22350 [2022-07-14 06:01:09,369 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 112 mSDsluCounter, 3544 mSDsCounter, 0 mSdLazyCounter, 3711 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 3610 SdHoareTripleChecker+Invalid, 4293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 551 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:09,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 3610 Invalid, 4293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3711 Invalid, 0 Unknown, 551 Unchecked, 1.2s Time] [2022-07-14 06:01:09,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-14 06:01:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2022-07-14 06:01:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 197 states have internal predecessors, (200), 0 states have call successors, (0), 0 states 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 06:01:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2022-07-14 06:01:09,372 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 181 [2022-07-14 06:01:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:09,372 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2022-07-14 06:01:09,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 4.8352941176470585) internal successors, (411), 85 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2022-07-14 06:01:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-14 06:01:09,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:09,373 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:09,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-14 06:01:09,579 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 06:01:09,579 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1555997408, now seen corresponding path program 16 times [2022-07-14 06:01:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:09,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041956048] [2022-07-14 06:01:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:09,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:09,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 24 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:01:10,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:10,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041956048] [2022-07-14 06:01:10,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041956048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:10,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009650329] [2022-07-14 06:01:10,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:01:10,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:10,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:10,947 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 06:01:10,948 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 06:01:11,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:01:11,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:11,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-14 06:01:11,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:11,146 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:01:11,146 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 06:01:12,045 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 06:01:13,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:01:13,621 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:01:13,621 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 32 treesize of output 23 [2022-07-14 06:01:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 500 proven. 253 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-14 06:01:13,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:15,695 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:01:15,696 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 87 treesize of output 87 [2022-07-14 06:01:15,703 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 30 treesize of output 28 [2022-07-14 06:01:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 395 proven. 358 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-14 06:01:17,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009650329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:17,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:17,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 36, 36] total 113 [2022-07-14 06:01:17,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729381544] [2022-07-14 06:01:17,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:17,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-07-14 06:01:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:17,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-07-14 06:01:17,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=11814, Unknown=0, NotChecked=0, Total=12656 [2022-07-14 06:01:17,560 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 113 states, 113 states have (on average 4.176991150442478) internal successors, (472), 113 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 06:01:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:24,496 INFO L93 Difference]: Finished difference Result 442 states and 446 transitions. [2022-07-14 06:01:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-07-14 06:01:24,496 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 4.176991150442478) internal successors, (472), 113 states have internal predecessors, (472), 0 states have call successors, (0), 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 192 [2022-07-14 06:01:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:24,498 INFO L225 Difference]: With dead ends: 442 [2022-07-14 06:01:24,498 INFO L226 Difference]: Without dead ends: 268 [2022-07-14 06:01:24,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8027 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2360, Invalid=34696, Unknown=0, NotChecked=0, Total=37056 [2022-07-14 06:01:24,500 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 392 mSDsluCounter, 3722 mSDsCounter, 0 mSdLazyCounter, 4158 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 3789 SdHoareTripleChecker+Invalid, 5037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 729 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:24,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 3789 Invalid, 5037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4158 Invalid, 0 Unknown, 729 Unchecked, 1.6s Time] [2022-07-14 06:01:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-07-14 06:01:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 202. [2022-07-14 06:01:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.02) internal successors, (204), 201 states have internal predecessors, (204), 0 states have call successors, (0), 0 states 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 06:01:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2022-07-14 06:01:24,504 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 192 [2022-07-14 06:01:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:24,504 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2022-07-14 06:01:24,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 4.176991150442478) internal successors, (472), 113 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 06:01:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2022-07-14 06:01:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-14 06:01:24,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:24,506 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:24,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-14 06:01:24,719 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 06:01:24,719 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:24,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:24,720 INFO L85 PathProgramCache]: Analyzing trace with hash 146392317, now seen corresponding path program 17 times [2022-07-14 06:01:24,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:24,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516975599] [2022-07-14 06:01:24,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:24,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 190 proven. 608 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-14 06:01:25,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516975599] [2022-07-14 06:01:25,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516975599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597701135] [2022-07-14 06:01:25,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:01:25,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:25,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:25,189 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 06:01:25,190 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 06:01:26,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2022-07-14 06:01:26,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:26,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 797 conjuncts, 100 conjunts are in the unsatisfiable core [2022-07-14 06:01:26,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:26,263 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:01:26,263 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 06:01:27,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 45 proven. 938 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:01:27,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:29,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 276 proven. 522 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-14 06:01:29,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597701135] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:29,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:29,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 33, 28] total 86 [2022-07-14 06:01:29,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809572272] [2022-07-14 06:01:29,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:29,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-14 06:01:29,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:29,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-14 06:01:29,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=6699, Unknown=0, NotChecked=0, Total=7482 [2022-07-14 06:01:29,107 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand has 87 states, 86 states have (on average 5.3604651162790695) internal successors, (461), 87 states have internal predecessors, (461), 0 states have call successors, (0), 0 states 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 06:01:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:31,021 INFO L93 Difference]: Finished difference Result 215 states and 217 transitions. [2022-07-14 06:01:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-14 06:01:31,022 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 5.3604651162790695) internal successors, (461), 87 states have internal predecessors, (461), 0 states have call successors, (0), 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 196 [2022-07-14 06:01:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:31,026 INFO L225 Difference]: With dead ends: 215 [2022-07-14 06:01:31,026 INFO L226 Difference]: Without dead ends: 211 [2022-07-14 06:01:31,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 333 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3372 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1577, Invalid=10855, Unknown=0, NotChecked=0, Total=12432 [2022-07-14 06:01:31,031 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 675 mSDsluCounter, 2010 mSDsCounter, 0 mSdLazyCounter, 3763 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 2076 SdHoareTripleChecker+Invalid, 3872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 3763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:31,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 2076 Invalid, 3872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 3763 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-14 06:01:31,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-14 06:01:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2022-07-14 06:01:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 208 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:31,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2022-07-14 06:01:31,034 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 196 [2022-07-14 06:01:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:31,034 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2022-07-14 06:01:31,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 5.3604651162790695) internal successors, (461), 87 states have internal predecessors, (461), 0 states have call successors, (0), 0 states 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 06:01:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2022-07-14 06:01:31,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-14 06:01:31,035 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:01:31,035 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:01:31,057 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 06:01:31,251 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 06:01:31,251 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:01:31,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:01:31,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1243179133, now seen corresponding path program 18 times [2022-07-14 06:01:31,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:01:31,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018351686] [2022-07-14 06:01:31,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:01:31,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:01:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:01:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 526 proven. 361 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-14 06:01:31,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:01:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018351686] [2022-07-14 06:01:31,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018351686] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:01:31,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257575102] [2022-07-14 06:01:31,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:01:31,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:01:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:01:31,695 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 06:01:31,701 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 06:01:34,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-14 06:01:34,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:01:34,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-14 06:01:34,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:01:34,069 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:01:34,070 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 06:01:34,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:01:34,520 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-14 06:01:34,520 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 34 treesize of output 51 [2022-07-14 06:01:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 48 proven. 89 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2022-07-14 06:01:34,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:01:36,497 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:01:36,498 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 87 treesize of output 87 [2022-07-14 06:01:36,525 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 30 treesize of output 28 [2022-07-14 06:01:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1163 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2022-07-14 06:01:37,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257575102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:01:37,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:01:37,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11, 11] total 51 [2022-07-14 06:01:37,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463711614] [2022-07-14 06:01:37,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:01:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 06:01:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:01:37,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 06:01:37,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2270, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 06:01:37,094 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 51 states, 51 states have (on average 4.450980392156863) internal successors, (227), 51 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 06:01:43,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:01:43,097 INFO L93 Difference]: Finished difference Result 359 states and 362 transitions. [2022-07-14 06:01:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-07-14 06:01:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.450980392156863) internal successors, (227), 51 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) Word has length 203 [2022-07-14 06:01:43,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:01:43,098 INFO L225 Difference]: With dead ends: 359 [2022-07-14 06:01:43,098 INFO L226 Difference]: Without dead ends: 0 [2022-07-14 06:01:43,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 374 SyntacticMatches, 12 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8076 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3775, Invalid=25637, Unknown=0, NotChecked=0, Total=29412 [2022-07-14 06:01:43,101 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:01:43,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 208 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1272 Invalid, 0 Unknown, 200 Unchecked, 0.5s Time] [2022-07-14 06:01:43,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-14 06:01:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-14 06:01:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:01:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-14 06:01:43,106 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 203 [2022-07-14 06:01:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:01:43,106 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-14 06:01:43,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.450980392156863) internal successors, (227), 51 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 06:01:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-14 06:01:43,106 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-14 06:01:43,109 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 19 remaining) [2022-07-14 06:01:43,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2022-07-14 06:01:43,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2022-07-14 06:01:43,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2022-07-14 06:01:43,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2022-07-14 06:01:43,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 19 remaining) [2022-07-14 06:01:43,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2022-07-14 06:01:43,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2022-07-14 06:01:43,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2022-07-14 06:01:43,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2022-07-14 06:01:43,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 19 remaining) [2022-07-14 06:01:43,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2022-07-14 06:01:43,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 19 remaining) [2022-07-14 06:01:43,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 19 remaining) [2022-07-14 06:01:43,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2022-07-14 06:01:43,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2022-07-14 06:01:43,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2022-07-14 06:01:43,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2022-07-14 06:01:43,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2022-07-14 06:01:43,144 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 06:01:43,313 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 06:01:43,316 INFO L356 BasicCegarLoop]: Path program histogram: [18, 16, 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 06:01:43,318 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-14 06:01:43,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.07 06:01:43 BoogieIcfgContainer [2022-07-14 06:01:43,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-14 06:01:43,321 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-14 06:01:43,321 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-14 06:01:43,321 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-14 06:01:43,321 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 05:59:15" (3/4) ... [2022-07-14 06:01:43,329 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-14 06:01:43,348 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2022-07-14 06:01:43,348 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-07-14 06:01:43,348 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-14 06:01:43,348 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-14 06:01:43,381 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-14 06:01:43,382 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-14 06:01:43,382 INFO L158 Benchmark]: Toolchain (without parser) took 148776.71ms. Allocated memory was 100.7MB in the beginning and 285.2MB in the end (delta: 184.5MB). Free memory was 68.7MB in the beginning and 225.7MB in the end (delta: -157.1MB). Peak memory consumption was 28.5MB. Max. memory is 16.1GB. [2022-07-14 06:01:43,382 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 100.7MB. Free memory was 56.5MB in the beginning and 56.4MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:01:43,382 INFO L158 Benchmark]: CACSL2BoogieTranslator took 298.46ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 68.5MB in the beginning and 105.5MB in the end (delta: -37.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:01:43,383 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.78ms. Allocated memory is still 136.3MB. Free memory was 105.5MB in the beginning and 103.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:01:43,383 INFO L158 Benchmark]: Boogie Preprocessor took 25.17ms. Allocated memory is still 136.3MB. Free memory was 103.4MB in the beginning and 102.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:01:43,383 INFO L158 Benchmark]: RCFGBuilder took 303.31ms. Allocated memory is still 136.3MB. Free memory was 102.2MB in the beginning and 88.4MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-14 06:01:43,383 INFO L158 Benchmark]: TraceAbstraction took 148036.20ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 88.0MB in the beginning and 228.9MB in the end (delta: -140.9MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. [2022-07-14 06:01:43,383 INFO L158 Benchmark]: Witness Printer took 61.10ms. Allocated memory is still 285.2MB. Free memory was 228.9MB in the beginning and 225.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-14 06:01:43,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 100.7MB. Free memory was 56.5MB in the beginning and 56.4MB in the end (delta: 47.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 298.46ms. Allocated memory was 100.7MB in the beginning and 136.3MB in the end (delta: 35.7MB). Free memory was 68.5MB in the beginning and 105.5MB in the end (delta: -37.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.78ms. Allocated memory is still 136.3MB. Free memory was 105.5MB in the beginning and 103.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.17ms. Allocated memory is still 136.3MB. Free memory was 103.4MB in the beginning and 102.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 303.31ms. Allocated memory is still 136.3MB. Free memory was 102.2MB in the beginning and 88.4MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 148036.20ms. Allocated memory was 136.3MB in the beginning and 285.2MB in the end (delta: 148.9MB). Free memory was 88.0MB in the beginning and 228.9MB in the end (delta: -140.9MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. * Witness Printer took 61.10ms. Allocated memory is still 285.2MB. Free memory was 228.9MB in the beginning and 225.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 148.0s, OverallIterations: 56, TraceHistogramMax: 14, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 56.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17149 SdHoareTripleChecker+Valid, 16.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17149 mSDsluCounter, 38884 SdHoareTripleChecker+Invalid, 14.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 9613 IncrementalHoareTripleChecker+Unchecked, 36718 mSDsCounter, 2550 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44901 IncrementalHoareTripleChecker+Invalid, 57064 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2550 mSolverCounterUnsat, 2166 mSDtfsCounter, 44901 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 9753 GetRequests, 6770 SyntacticMatches, 131 SemanticMatches, 2852 ConstructedPredicates, 3 IntricatePredicates, 56 DeprecatedPredicates, 56487 ImplicationChecksByTransitivity, 79.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=209occurred in iteration=55, InterpolantAutomatonStates: 1605, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 56 MinimizatonAttempts, 795 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 10.2s SatisfiabilityAnalysisTime, 69.0s InterpolantComputationTime, 8148 NumberOfCodeBlocks, 8057 NumberOfCodeBlocksAsserted, 219 NumberOfCheckSat, 11939 ConstructedInterpolants, 1303 QuantifiedInterpolants, 139335 SizeOfPredicates, 555 NumberOfNonLiveVariables, 16512 ConjunctsInSsa, 1912 ConjunctsInUnsatCore, 131 InterpolantComputations, 19 PerfectInterpolantSequences, 18417/40875 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-07-14 06:01:43,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE