./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_prepend_equal.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/list-simple/sll2c_prepend_equal.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 f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:56:21,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:56:21,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:56:21,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:56:21,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:56:21,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:56:21,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:56:21,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:56:21,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:56:21,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:56:21,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:56:21,528 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:56:21,528 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:56:21,530 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:56:21,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:56:21,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:56:21,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:56:21,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:56:21,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:56:21,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:56:21,547 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:56:21,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:56:21,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:56:21,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:56:21,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:56:21,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:56:21,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:56:21,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:56:21,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:56:21,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:56:21,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:56:21,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:56:21,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:56:21,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:56:21,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:56:21,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:56:21,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:56:21,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:56:21,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:56:21,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:56:21,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:56:21,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:56:21,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:56:21,598 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:56:21,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:56:21,599 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:56:21,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:56:21,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:56:21,600 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:56:21,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:56:21,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:56:21,601 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:56:21,601 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:56:21,602 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:56:21,602 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:56:21,602 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:56:21,602 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:56:21,602 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:56:21,603 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:56:21,603 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:56:21,603 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:56:21,603 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:56:21,603 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:56:21,604 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:56:21,604 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:56:21,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:56:21,604 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:56:21,604 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:56:21,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:56:21,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:56:21,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:56:21,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:56:21,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:56:21,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 [2022-07-14 06:56:21,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:56:21,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:56:21,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:56:21,859 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:56:21,860 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:56:21,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2022-07-14 06:56:21,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d168dbe/fa3431740a00466e8a2d3bc5f3a05afd/FLAGa567f5c11 [2022-07-14 06:56:22,359 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:56:22,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2022-07-14 06:56:22,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d168dbe/fa3431740a00466e8a2d3bc5f3a05afd/FLAGa567f5c11 [2022-07-14 06:56:22,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89d168dbe/fa3431740a00466e8a2d3bc5f3a05afd [2022-07-14 06:56:22,392 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:56:22,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:56:22,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:56:22,394 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:56:22,397 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:56:22,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@226cac73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22, skipping insertion in model container [2022-07-14 06:56:22,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:56:22,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:56:22,712 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i[24458,24471] [2022-07-14 06:56:22,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:56:22,731 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:56:22,771 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i[24458,24471] [2022-07-14 06:56:22,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:56:22,796 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:56:22,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22 WrapperNode [2022-07-14 06:56:22,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:56:22,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:56:22,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:56:22,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:56:22,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,861 INFO L137 Inliner]: procedures = 127, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 143 [2022-07-14 06:56:22,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:56:22,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:56:22,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:56:22,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:56:22,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:56:22,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:56:22,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:56:22,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:56:22,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (1/1) ... [2022-07-14 06:56:22,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:56:22,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:56:22,961 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:56:22,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:56:23,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:56:23,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:56:23,000 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-14 06:56:23,001 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-14 06:56:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:56:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:56:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:56:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:56:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:56:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:56:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:56:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-14 06:56:23,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:56:23,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:56:23,089 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:56:23,091 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:56:23,462 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:56:23,469 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:56:23,469 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-14 06:56:23,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:56:23 BoogieIcfgContainer [2022-07-14 06:56:23,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:56:23,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:56:23,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:56:23,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:56:23,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:56:22" (1/3) ... [2022-07-14 06:56:23,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5b26aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:56:23, skipping insertion in model container [2022-07-14 06:56:23,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:22" (2/3) ... [2022-07-14 06:56:23,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e5b26aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:56:23, skipping insertion in model container [2022-07-14 06:56:23,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:56:23" (3/3) ... [2022-07-14 06:56:23,490 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_equal.i [2022-07-14 06:56:23,508 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:56:23,508 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2022-07-14 06:56:23,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:56:23,573 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@1c9167c4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@42e70fa7 [2022-07-14 06:56:23,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-07-14 06:56:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:56:23,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:23,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:56:23,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:23,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash 895152213, now seen corresponding path program 1 times [2022-07-14 06:56:23,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:56:23,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722297400] [2022-07-14 06:56:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:23,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:56:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:56:23,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:56:23,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722297400] [2022-07-14 06:56:23,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722297400] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:23,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:56:23,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:56:23,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753093701] [2022-07-14 06:56:23,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:23,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:56:23,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:56:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:56:23,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:56:23,864 INFO L87 Difference]: Start difference. First operand has 119 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:56:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:24,015 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2022-07-14 06:56:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:56:24,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:56:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:24,026 INFO L225 Difference]: With dead ends: 117 [2022-07-14 06:56:24,026 INFO L226 Difference]: Without dead ends: 114 [2022-07-14 06:56:24,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:56:24,034 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:24,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 183 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:56:24,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-14 06:56:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-07-14 06:56:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 109 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2022-07-14 06:56:24,083 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 6 [2022-07-14 06:56:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:24,083 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2022-07-14 06:56:24,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:56:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2022-07-14 06:56:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:56:24,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:24,085 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:56:24,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:56:24,086 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:24,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash 895152214, now seen corresponding path program 1 times [2022-07-14 06:56:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:56:24,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809344520] [2022-07-14 06:56:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:24,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:56:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:56:24,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:56:24,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809344520] [2022-07-14 06:56:24,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809344520] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:24,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:56:24,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:56:24,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441370753] [2022-07-14 06:56:24,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:24,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:56:24,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:56:24,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:56:24,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:56:24,177 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:56:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:24,248 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2022-07-14 06:56:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:56:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:56:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:24,252 INFO L225 Difference]: With dead ends: 112 [2022-07-14 06:56:24,252 INFO L226 Difference]: Without dead ends: 112 [2022-07-14 06:56:24,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:56:24,258 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:24,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:56:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-14 06:56:24,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-14 06:56:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 60 states have (on average 1.9) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-07-14 06:56:24,278 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 6 [2022-07-14 06:56:24,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:24,281 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-07-14 06:56:24,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:56:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-07-14 06:56:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:56:24,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:24,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:24,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:56:24,284 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash 972366423, now seen corresponding path program 1 times [2022-07-14 06:56:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:56:24,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998881672] [2022-07-14 06:56:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:56:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:24,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:56:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:56:24,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:56:24,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998881672] [2022-07-14 06:56:24,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998881672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:24,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:56:24,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:56:24,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238978617] [2022-07-14 06:56:24,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:24,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:56:24,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:56:24,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:56:24,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:56:24,390 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:56:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:24,497 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2022-07-14 06:56:24,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:56:24,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-14 06:56:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:24,499 INFO L225 Difference]: With dead ends: 119 [2022-07-14 06:56:24,499 INFO L226 Difference]: Without dead ends: 119 [2022-07-14 06:56:24,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:56:24,500 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 5 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:24,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 275 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:56:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-14 06:56:24,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2022-07-14 06:56:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 108 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:24,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2022-07-14 06:56:24,508 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 13 [2022-07-14 06:56:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:24,509 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2022-07-14 06:56:24,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:56:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2022-07-14 06:56:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:56:24,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:24,510 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:24,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:56:24,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:24,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1029573860, now seen corresponding path program 1 times [2022-07-14 06:56:24,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:56:24,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098834750] [2022-07-14 06:56:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:24,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:56:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:24,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:56:24,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:24,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-14 06:56:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-14 06:56:24,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:56:24,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098834750] [2022-07-14 06:56:24,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098834750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:24,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:56:24,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:56:24,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538981358] [2022-07-14 06:56:24,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:24,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:56:24,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:56:24,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:56:24,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:56:24,680 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:56:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:24,931 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2022-07-14 06:56:24,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:56:24,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-14 06:56:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:24,934 INFO L225 Difference]: With dead ends: 113 [2022-07-14 06:56:24,934 INFO L226 Difference]: Without dead ends: 113 [2022-07-14 06:56:24,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:56:24,935 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 13 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:24,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 387 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:56:24,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-14 06:56:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-07-14 06:56:24,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 61 states have (on average 1.8688524590163935) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:24,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-07-14 06:56:24,946 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 22 [2022-07-14 06:56:24,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:24,947 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-07-14 06:56:24,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:56:24,947 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-07-14 06:56:24,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:56:24,948 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:24,948 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:24,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:56:24,949 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:24,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1029573859, now seen corresponding path program 1 times [2022-07-14 06:56:24,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:56:24,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563624316] [2022-07-14 06:56:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:24,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:56:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:25,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:56:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:25,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-14 06:56:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:56:25,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:56:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563624316] [2022-07-14 06:56:25,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563624316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:25,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:56:25,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:56:25,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998872934] [2022-07-14 06:56:25,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:25,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:56:25,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:56:25,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:56:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:56:25,081 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:56:25,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:25,283 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2022-07-14 06:56:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:56:25,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-14 06:56:25,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:25,285 INFO L225 Difference]: With dead ends: 112 [2022-07-14 06:56:25,285 INFO L226 Difference]: Without dead ends: 112 [2022-07-14 06:56:25,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:56:25,286 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 11 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:25,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 411 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:56:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-14 06:56:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-07-14 06:56:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.8524590163934427) internal successors, (113), 106 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2022-07-14 06:56:25,291 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 22 [2022-07-14 06:56:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:25,292 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2022-07-14 06:56:25,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:56:25,292 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2022-07-14 06:56:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:56:25,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:25,292 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:25,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:56:25,293 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:25,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:25,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1673413691, now seen corresponding path program 1 times [2022-07-14 06:56:25,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:56:25,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035876842] [2022-07-14 06:56:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:25,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:56:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:25,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:56:25,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:25,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-14 06:56:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 06:56:25,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:56:25,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035876842] [2022-07-14 06:56:25,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035876842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:56:25,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139246500] [2022-07-14 06:56:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:25,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:56:25,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:56:25,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:56:25,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:56:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:25,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-14 06:56:25,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:25,686 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:25,850 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:56:25,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:56:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:56:25,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:56:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:56:26,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139246500] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:56:26,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:56:26,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 18 [2022-07-14 06:56:26,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402439892] [2022-07-14 06:56:26,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:56:26,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-14 06:56:26,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:56:26,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-14 06:56:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-07-14 06:56:26,198 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:56:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:26,478 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2022-07-14 06:56:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:56:26,478 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2022-07-14 06:56:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:26,479 INFO L225 Difference]: With dead ends: 117 [2022-07-14 06:56:26,479 INFO L226 Difference]: Without dead ends: 117 [2022-07-14 06:56:26,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-07-14 06:56:26,480 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 27 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:26,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 839 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 434 Invalid, 0 Unknown, 184 Unchecked, 0.2s Time] [2022-07-14 06:56:26,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-14 06:56:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-14 06:56:26,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 67 states have (on average 1.7611940298507462) internal successors, (118), 111 states have internal predecessors, (118), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2022-07-14 06:56:26,485 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 25 [2022-07-14 06:56:26,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:26,485 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2022-07-14 06:56:26,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-14 06:56:26,486 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2022-07-14 06:56:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:56:26,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:26,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:26,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:56:26,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-14 06:56:26,687 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:26,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1673413690, now seen corresponding path program 1 times [2022-07-14 06:56:26,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:56:26,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54260614] [2022-07-14 06:56:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:26,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:56:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:26,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:56:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:26,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-14 06:56:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:56:26,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:56:26,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54260614] [2022-07-14 06:56:26,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54260614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:56:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710973701] [2022-07-14 06:56:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:26,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:56:26,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:56:26,918 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:56:26,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:56:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:27,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 06:56:27,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:27,028 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:27,262 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:56:27,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-14 06:56:27,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2022-07-14 06:56:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:56:27,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:56:27,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710973701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:56:27,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:56:27,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-14 06:56:27,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755360246] [2022-07-14 06:56:27,440 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:56:27,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:56:27,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:56:27,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:56:27,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:56:27,441 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 06:56:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:28,039 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2022-07-14 06:56:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:56:28,040 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-07-14 06:56:28,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:28,042 INFO L225 Difference]: With dead ends: 118 [2022-07-14 06:56:28,042 INFO L226 Difference]: Without dead ends: 118 [2022-07-14 06:56:28,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:56:28,044 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 210 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:28,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 697 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:56:28,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-14 06:56:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2022-07-14 06:56:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 67 states have (on average 1.7462686567164178) internal successors, (117), 110 states have internal predecessors, (117), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:28,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2022-07-14 06:56:28,059 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 25 [2022-07-14 06:56:28,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:28,059 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2022-07-14 06:56:28,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 16 states have internal predecessors, (37), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-14 06:56:28,061 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2022-07-14 06:56:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 06:56:28,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:28,062 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:28,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:56:28,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-14 06:56:28,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:28,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:28,264 INFO L85 PathProgramCache]: Analyzing trace with hash 512234271, now seen corresponding path program 1 times [2022-07-14 06:56:28,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:56:28,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724364171] [2022-07-14 06:56:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:28,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:56:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:28,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-14 06:56:28,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-14 06:56:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:28,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-14 06:56:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-14 06:56:28,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:56:28,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724364171] [2022-07-14 06:56:28,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724364171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:56:28,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431125394] [2022-07-14 06:56:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:28,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:56:28,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:56:28,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:56:28,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:56:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:28,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-14 06:56:28,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:28,660 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:28,670 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 06:56:28,776 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 06:56:28,911 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-14 06:56:28,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:56:29,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:56:29,113 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 54485 column 46: unknown constant v_#valid_BEFORE_CALL_9 at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.checkOrAddAxiom(DiffWrapperScript.java:161) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.convertApplicationTerm(DiffWrapperScript.java:171) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:109) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertTerm(ManagedScript.java:134) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:824) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-14 06:56:29,116 INFO L158 Benchmark]: Toolchain (without parser) took 6723.40ms. Allocated memory was 92.3MB in the beginning and 136.3MB in the end (delta: 44.0MB). Free memory was 59.4MB in the beginning and 55.2MB in the end (delta: 4.2MB). Peak memory consumption was 49.5MB. Max. memory is 16.1GB. [2022-07-14 06:56:29,116 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 92.3MB. Free memory is still 48.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-14 06:56:29,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 403.69ms. Allocated memory is still 92.3MB. Free memory was 59.2MB in the beginning and 60.0MB in the end (delta: -781.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-14 06:56:29,117 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.77ms. Allocated memory is still 92.3MB. Free memory was 60.0MB in the beginning and 57.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:56:29,117 INFO L158 Benchmark]: Boogie Preprocessor took 56.98ms. Allocated memory is still 92.3MB. Free memory was 57.6MB in the beginning and 55.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-14 06:56:29,117 INFO L158 Benchmark]: RCFGBuilder took 555.84ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 55.8MB in the beginning and 82.6MB in the end (delta: -26.8MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2022-07-14 06:56:29,118 INFO L158 Benchmark]: TraceAbstraction took 5637.57ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 82.1MB in the beginning and 55.2MB in the end (delta: 26.9MB). Peak memory consumption was 50.9MB. Max. memory is 16.1GB. [2022-07-14 06:56:29,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 92.3MB. Free memory is still 48.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 403.69ms. Allocated memory is still 92.3MB. Free memory was 59.2MB in the beginning and 60.0MB in the end (delta: -781.2kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.77ms. Allocated memory is still 92.3MB. Free memory was 60.0MB in the beginning and 57.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.98ms. Allocated memory is still 92.3MB. Free memory was 57.6MB in the beginning and 55.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 555.84ms. Allocated memory was 92.3MB in the beginning and 113.2MB in the end (delta: 21.0MB). Free memory was 55.8MB in the beginning and 82.6MB in the end (delta: -26.8MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. * TraceAbstraction took 5637.57ms. Allocated memory was 113.2MB in the beginning and 136.3MB in the end (delta: 23.1MB). Free memory was 82.1MB in the beginning and 55.2MB in the end (delta: 26.9MB). Peak memory consumption was 50.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 54485 column 46: unknown constant v_#valid_BEFORE_CALL_9 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 54485 column 46: unknown constant v_#valid_BEFORE_CALL_9: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-14 06:56:29,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/list-simple/sll2c_prepend_equal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:56:31,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:56:31,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:56:31,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:56:31,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:56:31,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:56:31,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:56:31,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:56:31,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:56:31,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:56:31,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:56:31,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:56:31,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:56:31,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:56:31,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:56:31,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:56:31,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:56:31,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:56:31,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:56:31,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:56:31,272 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:56:31,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:56:31,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:56:31,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:56:31,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:56:31,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:56:31,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:56:31,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:56:31,285 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:56:31,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:56:31,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:56:31,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:56:31,288 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:56:31,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:56:31,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:56:31,291 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:56:31,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:56:31,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:56:31,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:56:31,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:56:31,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:56:31,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:56:31,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-14 06:56:31,333 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:56:31,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:56:31,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:56:31,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:56:31,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:56:31,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:56:31,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:56:31,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:56:31,336 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:56:31,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:56:31,336 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:56:31,337 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:56:31,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:56:31,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:56:31,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:56:31,337 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:56:31,338 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:56:31,338 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:56:31,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:56:31,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:56:31,338 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-14 06:56:31,338 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-14 06:56:31,339 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:56:31,339 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:56:31,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:56:31,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:56:31,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:56:31,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:56:31,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:56:31,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:56:31,340 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-14 06:56:31,340 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-14 06:56:31,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-14 06:56:31,341 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 [2022-07-14 06:56:31,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:56:31,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:56:31,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:56:31,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:56:31,679 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:56:31,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2022-07-14 06:56:31,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6b32655/33ff735777f34e57a2f2ad433345df56/FLAG666b0e0b4 [2022-07-14 06:56:32,327 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:56:32,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2022-07-14 06:56:32,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6b32655/33ff735777f34e57a2f2ad433345df56/FLAG666b0e0b4 [2022-07-14 06:56:32,728 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f6b32655/33ff735777f34e57a2f2ad433345df56 [2022-07-14 06:56:32,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:56:32,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:56:32,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:56:32,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:56:32,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:56:32,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:56:32" (1/1) ... [2022-07-14 06:56:32,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da29c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:32, skipping insertion in model container [2022-07-14 06:56:32,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:56:32" (1/1) ... [2022-07-14 06:56:32,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:56:32,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:56:33,052 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i[24458,24471] [2022-07-14 06:56:33,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:56:33,070 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:56:33,104 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i[24458,24471] [2022-07-14 06:56:33,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:56:33,132 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:56:33,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33 WrapperNode [2022-07-14 06:56:33,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:56:33,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:56:33,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:56:33,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:56:33,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (1/1) ... [2022-07-14 06:56:33,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (1/1) ... [2022-07-14 06:56:33,183 INFO L137 Inliner]: procedures = 130, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 144 [2022-07-14 06:56:33,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:56:33,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:56:33,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:56:33,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:56:33,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (1/1) ... [2022-07-14 06:56:33,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (1/1) ... [2022-07-14 06:56:33,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (1/1) ... [2022-07-14 06:56:33,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (1/1) ... [2022-07-14 06:56:33,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (1/1) ... [2022-07-14 06:56:33,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (1/1) ... [2022-07-14 06:56:33,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (1/1) ... [2022-07-14 06:56:33,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:56:33,218 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:56:33,218 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:56:33,218 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:56:33,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (1/1) ... [2022-07-14 06:56:33,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:56:33,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:56:33,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:56:33,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:56:33,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-14 06:56:33,296 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-14 06:56:33,296 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-14 06:56:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-14 06:56:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-14 06:56:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:56:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-14 06:56:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-14 06:56:33,297 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:56:33,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-14 06:56:33,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-14 06:56:33,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-14 06:56:33,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:56:33,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:56:33,400 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:56:33,402 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:56:33,979 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:56:33,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:56:33,987 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-14 06:56:33,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:56:33 BoogieIcfgContainer [2022-07-14 06:56:33,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:56:33,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:56:33,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:56:33,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:56:33,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:56:32" (1/3) ... [2022-07-14 06:56:33,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590d3e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:56:33, skipping insertion in model container [2022-07-14 06:56:33,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:56:33" (2/3) ... [2022-07-14 06:56:33,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@590d3e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:56:33, skipping insertion in model container [2022-07-14 06:56:33,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:56:33" (3/3) ... [2022-07-14 06:56:33,998 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_equal.i [2022-07-14 06:56:34,013 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:56:34,013 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2022-07-14 06:56:34,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:56:34,086 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@683df9f6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@40be260e [2022-07-14 06:56:34,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2022-07-14 06:56:34,093 INFO L276 IsEmpty]: Start isEmpty. Operand has 119 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:34,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:56:34,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:34,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:56:34,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:34,110 INFO L85 PathProgramCache]: Analyzing trace with hash 895152213, now seen corresponding path program 1 times [2022-07-14 06:56:34,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:56:34,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [87209002] [2022-07-14 06:56:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:34,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:56:34,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:56:34,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:56:34,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-14 06:56:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:34,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-14 06:56:34,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:34,313 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:56:34,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:56:34,333 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:56:34,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [87209002] [2022-07-14 06:56:34,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [87209002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:34,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:56:34,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:56:34,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046432152] [2022-07-14 06:56:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:34,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:56:34,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:56:34,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:56:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:56:34,374 INFO L87 Difference]: Start difference. First operand has 119 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 114 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:56:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:34,613 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2022-07-14 06:56:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:56:34,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:56:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:34,623 INFO L225 Difference]: With dead ends: 117 [2022-07-14 06:56:34,623 INFO L226 Difference]: Without dead ends: 114 [2022-07-14 06:56:34,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:56:34,628 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:34,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 183 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:56:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-14 06:56:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-07-14 06:56:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 109 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 122 transitions. [2022-07-14 06:56:34,671 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 122 transitions. Word has length 6 [2022-07-14 06:56:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:34,671 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 122 transitions. [2022-07-14 06:56:34,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:56:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 122 transitions. [2022-07-14 06:56:34,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-14 06:56:34,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:34,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-14 06:56:34,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:56:34,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:56:34,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:34,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:34,882 INFO L85 PathProgramCache]: Analyzing trace with hash 895152214, now seen corresponding path program 1 times [2022-07-14 06:56:34,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:56:34,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094558117] [2022-07-14 06:56:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:34,882 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:56:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:56:34,884 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:56:34,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-14 06:56:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:34,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:56:34,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:34,958 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:56:34,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:56:34,974 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:56:34,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094558117] [2022-07-14 06:56:34,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094558117] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:34,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:56:34,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:56:34,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186802142] [2022-07-14 06:56:34,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:34,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:56:34,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:56:34,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:56:34,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:56:34,978 INFO L87 Difference]: Start difference. First operand 114 states and 122 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:56:35,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:35,173 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2022-07-14 06:56:35,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:56:35,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-14 06:56:35,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:35,175 INFO L225 Difference]: With dead ends: 112 [2022-07-14 06:56:35,175 INFO L226 Difference]: Without dead ends: 112 [2022-07-14 06:56:35,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:56:35,177 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:35,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 185 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:56:35,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-14 06:56:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-14 06:56:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 60 states have (on average 1.9) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:35,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-07-14 06:56:35,186 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 6 [2022-07-14 06:56:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:35,186 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-07-14 06:56:35,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:56:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-07-14 06:56:35,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:56:35,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:35,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:35,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:56:35,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:56:35,397 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:35,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:35,397 INFO L85 PathProgramCache]: Analyzing trace with hash 972366423, now seen corresponding path program 1 times [2022-07-14 06:56:35,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:56:35,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980319615] [2022-07-14 06:56:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:35,399 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:56:35,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:56:35,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:56:35,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-14 06:56:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:35,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:56:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:56:35,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:56:35,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:56:35,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980319615] [2022-07-14 06:56:35,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980319615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:35,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:56:35,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:56:35,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97898491] [2022-07-14 06:56:35,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:35,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:56:35,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:56:35,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:56:35,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:56:35,514 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:56:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:35,529 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2022-07-14 06:56:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:56:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-14 06:56:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:35,533 INFO L225 Difference]: With dead ends: 119 [2022-07-14 06:56:35,534 INFO L226 Difference]: Without dead ends: 119 [2022-07-14 06:56:35,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:56:35,535 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 5 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:35,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 233 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:56:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-14 06:56:35,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2022-07-14 06:56:35,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 61 states have (on average 1.8852459016393444) internal successors, (115), 108 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2022-07-14 06:56:35,552 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 13 [2022-07-14 06:56:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:35,553 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2022-07-14 06:56:35,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 06:56:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2022-07-14 06:56:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:56:35,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:35,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:35,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-14 06:56:35,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:56:35,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:35,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1029573860, now seen corresponding path program 1 times [2022-07-14 06:56:35,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:56:35,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455776431] [2022-07-14 06:56:35,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:35,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:56:35,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:56:35,761 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:56:35,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-14 06:56:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:35,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:56:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:35,873 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:56:35,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:56:35,915 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:56:35,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455776431] [2022-07-14 06:56:35,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455776431] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:35,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:56:35,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:56:35,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677051514] [2022-07-14 06:56:35,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:35,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:56:35,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:56:35,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:56:35,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:56:35,921 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:56:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:36,306 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2022-07-14 06:56:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:56:36,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-14 06:56:36,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:36,308 INFO L225 Difference]: With dead ends: 113 [2022-07-14 06:56:36,309 INFO L226 Difference]: Without dead ends: 113 [2022-07-14 06:56:36,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:56:36,310 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 12 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:36,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 349 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:56:36,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-14 06:56:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-07-14 06:56:36,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 61 states have (on average 1.8688524590163935) internal successors, (114), 107 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:36,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-07-14 06:56:36,317 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 22 [2022-07-14 06:56:36,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:36,317 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-07-14 06:56:36,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:56:36,318 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-07-14 06:56:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-14 06:56:36,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:36,318 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:36,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:56:36,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:56:36,528 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1029573859, now seen corresponding path program 1 times [2022-07-14 06:56:36,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:56:36,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720137678] [2022-07-14 06:56:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:36,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:56:36,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:56:36,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:56:36,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-14 06:56:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:36,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:56:36,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:36,651 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:36,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:56:36,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:56:36,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:56:36,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720137678] [2022-07-14 06:56:36,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720137678] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:36,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:56:36,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:56:36,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410530474] [2022-07-14 06:56:36,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:36,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:56:36,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:56:36,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:56:36,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:56:36,726 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:56:37,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:37,105 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2022-07-14 06:56:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:56:37,106 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-14 06:56:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:37,107 INFO L225 Difference]: With dead ends: 112 [2022-07-14 06:56:37,107 INFO L226 Difference]: Without dead ends: 112 [2022-07-14 06:56:37,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:56:37,108 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 11 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:37,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 373 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:56:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-14 06:56:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-07-14 06:56:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.8524590163934427) internal successors, (113), 106 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2022-07-14 06:56:37,114 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 22 [2022-07-14 06:56:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:37,115 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2022-07-14 06:56:37,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 06:56:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2022-07-14 06:56:37,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:56:37,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:37,116 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:37,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:56:37,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:56:37,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:37,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1673413691, now seen corresponding path program 1 times [2022-07-14 06:56:37,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:56:37,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1242650216] [2022-07-14 06:56:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:37,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:56:37,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:56:37,330 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:56:37,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-14 06:56:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:37,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-14 06:56:37,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:37,448 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:37,619 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:56:37,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-14 06:56:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:56:37,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:56:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:56:37,839 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:56:37,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1242650216] [2022-07-14 06:56:37,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1242650216] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:56:37,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:56:37,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-14 06:56:37,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571633300] [2022-07-14 06:56:37,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:56:37,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:56:37,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:56:37,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:56:37,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:56:37,841 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:56:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:38,200 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2022-07-14 06:56:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:56:38,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-07-14 06:56:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:38,202 INFO L225 Difference]: With dead ends: 117 [2022-07-14 06:56:38,202 INFO L226 Difference]: Without dead ends: 117 [2022-07-14 06:56:38,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-14 06:56:38,203 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 6 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:38,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 398 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 63 Unchecked, 0.3s Time] [2022-07-14 06:56:38,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-14 06:56:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-07-14 06:56:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 67 states have (on average 1.7611940298507462) internal successors, (118), 111 states have internal predecessors, (118), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2022-07-14 06:56:38,221 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 25 [2022-07-14 06:56:38,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:38,221 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2022-07-14 06:56:38,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:56:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2022-07-14 06:56:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:56:38,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:38,222 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:38,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:56:38,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:56:38,433 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:38,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1673413690, now seen corresponding path program 1 times [2022-07-14 06:56:38,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:56:38,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771980878] [2022-07-14 06:56:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:38,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:56:38,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:56:38,435 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:56:38,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-14 06:56:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:38,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:56:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:38,557 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:38,562 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:38,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:38,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:56:38,774 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:56:38,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-14 06:56:38,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:56:38,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:56:43,080 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:56:43,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771980878] [2022-07-14 06:56:43,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771980878] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:56:43,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116978237] [2022-07-14 06:56:43,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:43,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:56:43,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:56:43,084 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:56:43,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-07-14 06:56:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:43,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:56:43,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:43,254 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:43,265 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:43,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:43,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:56:43,535 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:56:43,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-14 06:56:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:56:43,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:56:45,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116978237] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:56:45,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:56:45,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-14 06:56:45,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838551184] [2022-07-14 06:56:45,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:56:45,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:56:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:56:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:56:45,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=85, Unknown=2, NotChecked=0, Total=110 [2022-07-14 06:56:45,923 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:56:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:46,789 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2022-07-14 06:56:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:56:46,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-07-14 06:56:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:46,790 INFO L225 Difference]: With dead ends: 127 [2022-07-14 06:56:46,790 INFO L226 Difference]: Without dead ends: 127 [2022-07-14 06:56:46,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=31, Invalid=123, Unknown=2, NotChecked=0, Total=156 [2022-07-14 06:56:46,791 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 4 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:46,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 440 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 74 Unchecked, 0.8s Time] [2022-07-14 06:56:46,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-14 06:56:46,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 123. [2022-07-14 06:56:46,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 72 states have (on average 1.7222222222222223) internal successors, (124), 116 states have internal predecessors, (124), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:56:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 132 transitions. [2022-07-14 06:56:46,801 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 132 transitions. Word has length 25 [2022-07-14 06:56:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:46,801 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 132 transitions. [2022-07-14 06:56:46,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-14 06:56:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 132 transitions. [2022-07-14 06:56:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 06:56:46,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:46,805 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:46,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-07-14 06:56:47,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-14 06:56:47,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:56:47,209 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:47,209 INFO L85 PathProgramCache]: Analyzing trace with hash 512234271, now seen corresponding path program 1 times [2022-07-14 06:56:47,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:56:47,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890686944] [2022-07-14 06:56:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:47,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:56:47,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:56:47,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:56:47,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-14 06:56:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:47,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-14 06:56:47,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:47,401 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:47,441 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 06:56:47,591 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:56:47,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-14 06:56:47,628 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 06:56:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:47,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:56:48,017 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:56:48,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-14 06:56:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:56:48,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:56:48,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:56:48,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890686944] [2022-07-14 06:56:48,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890686944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:56:48,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [543880152] [2022-07-14 06:56:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:48,373 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:56:48,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:56:48,374 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:56:48,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-07-14 06:56:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:48,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-14 06:56:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:48,744 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-14 06:56:48,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-07-14 06:56:48,815 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:56:48,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:56:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:48,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:48,936 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:56:48,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 31 [2022-07-14 06:56:49,059 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:56:49,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-07-14 06:56:49,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:49,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:49,246 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:56:49,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2022-07-14 06:56:49,540 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:56:49,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 18 [2022-07-14 06:56:49,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:49,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:49,687 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-14 06:56:49,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2022-07-14 06:56:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-14 06:56:50,274 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:56:50,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [543880152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:50,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:56:50,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-14 06:56:50,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18224285] [2022-07-14 06:56:50,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:50,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:56:50,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:56:50,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:56:50,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:56:50,276 INFO L87 Difference]: Start difference. First operand 123 states and 132 transitions. Second operand has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:50,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:56:50,850 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2022-07-14 06:56:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-14 06:56:50,851 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2022-07-14 06:56:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:56:50,852 INFO L225 Difference]: With dead ends: 125 [2022-07-14 06:56:50,852 INFO L226 Difference]: Without dead ends: 125 [2022-07-14 06:56:50,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:56:50,853 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 3 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:56:50,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 425 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 219 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2022-07-14 06:56:50,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-14 06:56:50,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2022-07-14 06:56:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 72 states have (on average 1.7083333333333333) internal successors, (123), 115 states have internal predecessors, (123), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:56:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2022-07-14 06:56:50,857 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 37 [2022-07-14 06:56:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:56:50,858 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2022-07-14 06:56:50,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:56:50,858 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2022-07-14 06:56:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 06:56:50,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:56:50,859 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:56:50,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:56:51,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-14 06:56:51,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:56:51,270 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:56:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:56:51,270 INFO L85 PathProgramCache]: Analyzing trace with hash 512234272, now seen corresponding path program 1 times [2022-07-14 06:56:51,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:56:51,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1238317364] [2022-07-14 06:56:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:51,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:56:51,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:56:51,272 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:56:51,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-14 06:56:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:51,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:56:51,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:51,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:51,505 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:51,529 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 06:56:51,536 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 06:56:53,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:53,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:56:53,742 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:56:53,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-14 06:56:53,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:56:55,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:55,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:56:56,286 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:56:56,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:56:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:56:56,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:56:56,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:56:56,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1238317364] [2022-07-14 06:56:56,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1238317364] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:56:56,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [633496306] [2022-07-14 06:56:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:56:56,768 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:56:56,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:56:56,769 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:56:56,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-07-14 06:56:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:56:57,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-14 06:56:57,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:56:57,087 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:56:57,111 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 06:56:57,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:57,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:56:57,332 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 06:56:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:59,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:56:59,697 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 06:56:59,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:56:59,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:56:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-14 06:56:59,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:56:59,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [633496306] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:56:59,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-14 06:56:59,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 15 [2022-07-14 06:56:59,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885250390] [2022-07-14 06:56:59,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:56:59,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:56:59,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:56:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:56:59,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=253, Unknown=3, NotChecked=0, Total=306 [2022-07-14 06:56:59,881 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand has 9 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:00,499 INFO L93 Difference]: Finished difference Result 122 states and 131 transitions. [2022-07-14 06:57:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:57:00,500 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2022-07-14 06:57:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:00,501 INFO L225 Difference]: With dead ends: 122 [2022-07-14 06:57:00,501 INFO L226 Difference]: Without dead ends: 122 [2022-07-14 06:57:00,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=59, Invalid=280, Unknown=3, NotChecked=0, Total=342 [2022-07-14 06:57:00,502 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 12 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:00,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 155 Invalid, 0 Unknown, 103 Unchecked, 0.5s Time] [2022-07-14 06:57:00,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-14 06:57:00,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-07-14 06:57:00,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 72 states have (on average 1.6944444444444444) internal successors, (122), 114 states have internal predecessors, (122), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 06:57:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 130 transitions. [2022-07-14 06:57:00,506 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 130 transitions. Word has length 37 [2022-07-14 06:57:00,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:00,507 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 130 transitions. [2022-07-14 06:57:00,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 130 transitions. [2022-07-14 06:57:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 06:57:00,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:00,508 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:00,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-07-14 06:57:00,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:00,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:00,923 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:00,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:00,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1212309452, now seen corresponding path program 2 times [2022-07-14 06:57:00,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:00,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [266236132] [2022-07-14 06:57:00,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:57:00,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:00,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:00,925 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:00,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-14 06:57:01,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:57:01,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:57:01,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:57:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:57:01,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-14 06:57:01,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:01,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [266236132] [2022-07-14 06:57:01,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [266236132] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:57:01,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:57:01,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-14 06:57:01,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79038400] [2022-07-14 06:57:01,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:57:01,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:57:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:01,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:57:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:57:01,215 INFO L87 Difference]: Start difference. First operand 121 states and 130 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:57:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:01,252 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2022-07-14 06:57:01,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:57:01,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2022-07-14 06:57:01,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:01,253 INFO L225 Difference]: With dead ends: 114 [2022-07-14 06:57:01,253 INFO L226 Difference]: Without dead ends: 114 [2022-07-14 06:57:01,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:57:01,254 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 95 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:01,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 251 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:57:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-14 06:57:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-07-14 06:57:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 108 states have internal predecessors, (114), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2022-07-14 06:57:01,260 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 37 [2022-07-14 06:57:01,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:01,260 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2022-07-14 06:57:01,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-14 06:57:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2022-07-14 06:57:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-14 06:57:01,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:01,263 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:01,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:01,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:01,468 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:01,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1664104416, now seen corresponding path program 1 times [2022-07-14 06:57:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:01,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122289861] [2022-07-14 06:57:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:01,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:01,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:01,471 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:01,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-14 06:57:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:01,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 06:57:01,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:57:01,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:57:01,618 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:01,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122289861] [2022-07-14 06:57:01,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122289861] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:57:01,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:57:01,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:57:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962162772] [2022-07-14 06:57:01,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:57:01,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:57:01,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:57:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:57:01,621 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:57:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:01,801 INFO L93 Difference]: Finished difference Result 127 states and 134 transitions. [2022-07-14 06:57:01,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:57:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-14 06:57:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:01,803 INFO L225 Difference]: With dead ends: 127 [2022-07-14 06:57:01,803 INFO L226 Difference]: Without dead ends: 127 [2022-07-14 06:57:01,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:57:01,804 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 79 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:01,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 98 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:57:01,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-14 06:57:01,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2022-07-14 06:57:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 67 states have (on average 1.626865671641791) internal successors, (109), 103 states have internal predecessors, (109), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2022-07-14 06:57:01,812 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 39 [2022-07-14 06:57:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:01,813 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2022-07-14 06:57:01,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:57:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2022-07-14 06:57:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-14 06:57:01,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:01,816 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:01,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:02,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:02,028 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:02,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1664104415, now seen corresponding path program 1 times [2022-07-14 06:57:02,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:02,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107585576] [2022-07-14 06:57:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:02,029 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:02,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:02,030 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:02,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-14 06:57:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:02,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-14 06:57:02,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:57:02,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:57:02,254 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:02,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107585576] [2022-07-14 06:57:02,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107585576] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:57:02,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:57:02,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:57:02,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816084989] [2022-07-14 06:57:02,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:57:02,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:57:02,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:02,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:57:02,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:57:02,255 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:57:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:02,481 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-07-14 06:57:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:57:02,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-14 06:57:02,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:02,484 INFO L225 Difference]: With dead ends: 104 [2022-07-14 06:57:02,484 INFO L226 Difference]: Without dead ends: 104 [2022-07-14 06:57:02,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:57:02,485 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 160 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:02,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 120 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:57:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-14 06:57:02,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-07-14 06:57:02,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.5522388059701493) internal successors, (104), 98 states have internal predecessors, (104), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2022-07-14 06:57:02,488 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 39 [2022-07-14 06:57:02,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:02,488 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2022-07-14 06:57:02,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:57:02,488 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2022-07-14 06:57:02,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-14 06:57:02,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:02,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:57:02,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:02,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:02,702 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:02,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:02,702 INFO L85 PathProgramCache]: Analyzing trace with hash -47629334, now seen corresponding path program 1 times [2022-07-14 06:57:02,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:02,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906228248] [2022-07-14 06:57:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:02,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:02,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:02,704 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:02,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-14 06:57:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:02,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 06:57:02,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:02,880 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:57:02,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:57:02,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:02,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906228248] [2022-07-14 06:57:02,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906228248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:57:02,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:57:02,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:57:02,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646287353] [2022-07-14 06:57:02,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:57:02,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:57:02,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:57:02,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:57:02,969 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:57:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:03,431 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2022-07-14 06:57:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:57:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-14 06:57:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:03,432 INFO L225 Difference]: With dead ends: 120 [2022-07-14 06:57:03,432 INFO L226 Difference]: Without dead ends: 120 [2022-07-14 06:57:03,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:57:03,433 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 73 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:03,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 240 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:57:03,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-14 06:57:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2022-07-14 06:57:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 96 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2022-07-14 06:57:03,437 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 40 [2022-07-14 06:57:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:03,437 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2022-07-14 06:57:03,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:57:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2022-07-14 06:57:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-14 06:57:03,438 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:03,438 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 06:57:03,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-07-14 06:57:03,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:03,647 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash -47629333, now seen corresponding path program 1 times [2022-07-14 06:57:03,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:03,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [514915573] [2022-07-14 06:57:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:03,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:03,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:03,650 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:03,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-14 06:57:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:03,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-14 06:57:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:03,807 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:57:03,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:57:03,899 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:03,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [514915573] [2022-07-14 06:57:03,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [514915573] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:57:03,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:57:03,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:57:03,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524162803] [2022-07-14 06:57:03,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:57:03,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:57:03,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:03,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:57:03,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:57:03,901 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:57:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:04,379 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2022-07-14 06:57:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:57:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2022-07-14 06:57:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:04,381 INFO L225 Difference]: With dead ends: 100 [2022-07-14 06:57:04,381 INFO L226 Difference]: Without dead ends: 100 [2022-07-14 06:57:04,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:57:04,382 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 75 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:04,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 251 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:57:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-14 06:57:04,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-07-14 06:57:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.492537313432836) internal successors, (100), 94 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:04,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2022-07-14 06:57:04,385 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 40 [2022-07-14 06:57:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:04,385 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2022-07-14 06:57:04,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:57:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2022-07-14 06:57:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:57:04,387 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:04,387 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:04,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:04,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:04,591 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:04,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1476263067, now seen corresponding path program 1 times [2022-07-14 06:57:04,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:04,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430128337] [2022-07-14 06:57:04,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:04,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:04,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:04,594 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:04,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-14 06:57:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:04,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-14 06:57:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:04,858 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:05,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:05,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-07-14 06:57:05,431 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-14 06:57:05,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2022-07-14 06:57:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:05,448 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 27 treesize of output 27 [2022-07-14 06:57:05,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-14 06:57:05,716 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:57:05,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:05,992 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:05,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430128337] [2022-07-14 06:57:05,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430128337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:05,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [959282806] [2022-07-14 06:57:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:05,992 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:57:05,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:57:05,994 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:57:05,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-14 06:57:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:06,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 06:57:06,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:06,348 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:06,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-07-14 06:57:07,116 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-14 06:57:07,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2022-07-14 06:57:07,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:07,133 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 28 treesize of output 28 [2022-07-14 06:57:07,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-14 06:57:07,360 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:57:07,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:07,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [959282806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:07,537 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:57:07,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2022-07-14 06:57:07,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084489973] [2022-07-14 06:57:07,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:57:07,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-14 06:57:07,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-14 06:57:07,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=703, Unknown=6, NotChecked=0, Total=812 [2022-07-14 06:57:07,539 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 27 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:57:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:08,349 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2022-07-14 06:57:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:57:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2022-07-14 06:57:08,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:08,351 INFO L225 Difference]: With dead ends: 160 [2022-07-14 06:57:08,352 INFO L226 Difference]: Without dead ends: 160 [2022-07-14 06:57:08,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 10 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=163, Invalid=1087, Unknown=10, NotChecked=0, Total=1260 [2022-07-14 06:57:08,353 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 84 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:08,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 579 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 367 Unchecked, 0.4s Time] [2022-07-14 06:57:08,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-14 06:57:08,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 109. [2022-07-14 06:57:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.486842105263158) internal successors, (113), 103 states have internal predecessors, (113), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2022-07-14 06:57:08,356 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 41 [2022-07-14 06:57:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:08,357 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2022-07-14 06:57:08,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:57:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2022-07-14 06:57:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 06:57:08,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:08,358 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:08,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-07-14 06:57:08,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:08,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:08,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1476263066, now seen corresponding path program 1 times [2022-07-14 06:57:08,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:08,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582024625] [2022-07-14 06:57:08,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:08,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:08,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:08,765 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:08,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-14 06:57:08,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:08,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-14 06:57:08,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:09,015 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:09,024 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:09,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:09,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-07-14 06:57:09,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:57:10,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:10,084 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 14 treesize of output 16 [2022-07-14 06:57:10,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:10,101 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 28 treesize of output 28 [2022-07-14 06:57:10,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:10,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:57:10,142 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:57:10,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:57:10,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:57:10,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-14 06:57:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:57:10,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:11,215 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:11,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582024625] [2022-07-14 06:57:11,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582024625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:11,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1748302814] [2022-07-14 06:57:11,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:11,216 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:57:11,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:57:11,217 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:57:11,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-07-14 06:57:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:11,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-14 06:57:11,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:11,649 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:11,658 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:12,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-07-14 06:57:12,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:57:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:12,781 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 14 treesize of output 16 [2022-07-14 06:57:12,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:12,798 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 28 treesize of output 28 [2022-07-14 06:57:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:12,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:57:12,835 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:57:12,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:57:13,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-14 06:57:13,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:57:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:57:13,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:13,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1748302814] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:13,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:57:13,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2022-07-14 06:57:13,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788473634] [2022-07-14 06:57:13,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:57:13,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-14 06:57:13,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:13,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-14 06:57:13,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=753, Unknown=12, NotChecked=0, Total=870 [2022-07-14 06:57:13,603 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:57:15,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:15,309 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2022-07-14 06:57:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:57:15,310 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2022-07-14 06:57:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:15,311 INFO L225 Difference]: With dead ends: 159 [2022-07-14 06:57:15,311 INFO L226 Difference]: Without dead ends: 159 [2022-07-14 06:57:15,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 58 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=166, Invalid=1150, Unknown=16, NotChecked=0, Total=1332 [2022-07-14 06:57:15,312 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 87 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:15,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 998 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 588 Invalid, 0 Unknown, 181 Unchecked, 1.1s Time] [2022-07-14 06:57:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-14 06:57:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 109. [2022-07-14 06:57:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.4473684210526316) internal successors, (110), 103 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2022-07-14 06:57:15,316 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 41 [2022-07-14 06:57:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:15,317 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2022-07-14 06:57:15,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:57:15,317 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2022-07-14 06:57:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:57:15,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:15,318 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:15,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:15,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:15,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:15,723 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:15,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:15,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1472852043, now seen corresponding path program 1 times [2022-07-14 06:57:15,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:15,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311560142] [2022-07-14 06:57:15,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:15,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:15,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:15,725 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:15,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-14 06:57:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:15,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-14 06:57:15,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:15,904 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:57:15,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:57:15,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:15,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311560142] [2022-07-14 06:57:15,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311560142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:57:15,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:57:15,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:57:15,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364080035] [2022-07-14 06:57:15,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:57:15,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:57:15,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:15,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:57:15,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:57:15,906 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:57:16,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:16,071 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2022-07-14 06:57:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:57:16,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-07-14 06:57:16,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:16,072 INFO L225 Difference]: With dead ends: 124 [2022-07-14 06:57:16,072 INFO L226 Difference]: Without dead ends: 124 [2022-07-14 06:57:16,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:57:16,073 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 151 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:16,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 109 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:57:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-14 06:57:16,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2022-07-14 06:57:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.4078947368421053) internal successors, (107), 100 states have internal predecessors, (107), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:16,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2022-07-14 06:57:16,076 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 42 [2022-07-14 06:57:16,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:16,077 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2022-07-14 06:57:16,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:57:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2022-07-14 06:57:16,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:57:16,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:16,078 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:16,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:16,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:16,288 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:16,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:16,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1472852044, now seen corresponding path program 1 times [2022-07-14 06:57:16,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:16,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55448208] [2022-07-14 06:57:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:16,289 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:16,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:16,291 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:16,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-14 06:57:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:16,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 06:57:16,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:57:16,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:57:16,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:16,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55448208] [2022-07-14 06:57:16,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55448208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:57:16,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:57:16,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:57:16,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439445234] [2022-07-14 06:57:16,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:57:16,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:57:16,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:16,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:57:16,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:57:16,546 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:57:16,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:16,745 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2022-07-14 06:57:16,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:57:16,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-07-14 06:57:16,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:16,747 INFO L225 Difference]: With dead ends: 103 [2022-07-14 06:57:16,747 INFO L226 Difference]: Without dead ends: 103 [2022-07-14 06:57:16,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:57:16,748 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 138 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:16,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 99 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:57:16,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-14 06:57:16,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-07-14 06:57:16,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 76 states have (on average 1.368421052631579) internal successors, (104), 97 states have internal predecessors, (104), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2022-07-14 06:57:16,751 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 42 [2022-07-14 06:57:16,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:16,751 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2022-07-14 06:57:16,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-14 06:57:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2022-07-14 06:57:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:57:16,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:16,752 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:16,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-07-14 06:57:16,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:16,959 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1928392465, now seen corresponding path program 1 times [2022-07-14 06:57:16,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:16,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606186325] [2022-07-14 06:57:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:16,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:16,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:16,961 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:16,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-14 06:57:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:17,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-14 06:57:17,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:17,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:17,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:17,549 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:57:17,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 21 [2022-07-14 06:57:17,558 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 6 treesize of output 4 [2022-07-14 06:57:17,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-07-14 06:57:17,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:17,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:57:17,951 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:57:17,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:18,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-07-14 06:57:18,526 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 17 treesize of output 15 [2022-07-14 06:57:18,557 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_58| (_ BitVec 32)) (v_ArrVal_1254 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_58| v_ArrVal_1254) |c_ULTIMATE.start_sll_circular_prepend_~head#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~head#1.offset|) (_ bv0 32))) (and (= |c_ULTIMATE.start_main_~#s~0#1.base| |v_node_create_~temp~0#1.base_58|) (= |c_ULTIMATE.start_main_~#s~0#1.offset| (_ bv0 32))))) is different from false [2022-07-14 06:57:18,559 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606186325] [2022-07-14 06:57:18,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606186325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:18,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1362519889] [2022-07-14 06:57:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:18,560 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:57:18,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:57:18,568 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:57:18,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-07-14 06:57:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:18,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:57:18,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:19,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-07-14 06:57:19,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:19,991 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 15 treesize of output 17 [2022-07-14 06:57:20,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-14 06:57:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:57:20,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:20,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1362519889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:20,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:57:20,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 36 [2022-07-14 06:57:20,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785712547] [2022-07-14 06:57:20,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:57:20,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 06:57:20,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:20,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 06:57:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1628, Unknown=32, NotChecked=82, Total=1892 [2022-07-14 06:57:20,376 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 36 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:57:22,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:22,145 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2022-07-14 06:57:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:57:22,145 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2022-07-14 06:57:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:22,146 INFO L225 Difference]: With dead ends: 102 [2022-07-14 06:57:22,146 INFO L226 Difference]: Without dead ends: 102 [2022-07-14 06:57:22,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=250, Invalid=2579, Unknown=37, NotChecked=104, Total=2970 [2022-07-14 06:57:22,147 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 82 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:22,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 1387 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 558 Invalid, 0 Unknown, 152 Unchecked, 1.0s Time] [2022-07-14 06:57:22,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-14 06:57:22,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-07-14 06:57:22,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 94 states have internal predecessors, (100), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2022-07-14 06:57:22,151 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 44 [2022-07-14 06:57:22,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:22,151 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2022-07-14 06:57:22,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 31 states have internal predecessors, (75), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-14 06:57:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2022-07-14 06:57:22,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:57:22,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:22,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:22,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:22,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-07-14 06:57:22,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:57:22,564 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:22,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:22,564 INFO L85 PathProgramCache]: Analyzing trace with hash -710984888, now seen corresponding path program 1 times [2022-07-14 06:57:22,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:22,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [79848622] [2022-07-14 06:57:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:22,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:22,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:22,565 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:22,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-14 06:57:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:22,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-14 06:57:22,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:22,873 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:23,141 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:57:23,141 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-14 06:57:23,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:23,426 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:57:23,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-07-14 06:57:23,633 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-07-14 06:57:23,633 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 35 [2022-07-14 06:57:23,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:57:23,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:57:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:24,131 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:57:24,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 55 [2022-07-14 06:57:24,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:24,150 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 48 treesize of output 48 [2022-07-14 06:57:24,214 INFO L356 Elim1Store]: treesize reduction 78, result has 42.2 percent of original size [2022-07-14 06:57:24,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 76 [2022-07-14 06:57:24,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-07-14 06:57:25,041 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:57:25,041 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 42 [2022-07-14 06:57:25,421 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:57:25,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:25,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [79848622] [2022-07-14 06:57:25,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [79848622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:25,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1397393229] [2022-07-14 06:57:25,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:25,958 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:57:25,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:57:25,959 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:57:25,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-07-14 06:57:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:26,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:57:26,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:26,402 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:27,068 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:57:27,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-14 06:57:27,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:27,780 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:57:27,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2022-07-14 06:57:28,298 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:57:28,299 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 26 [2022-07-14 06:57:28,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:57:28,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:57:28,747 INFO L356 Elim1Store]: treesize reduction 78, result has 42.2 percent of original size [2022-07-14 06:57:28,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 76 [2022-07-14 06:57:28,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:28,797 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:57:28,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 74 [2022-07-14 06:57:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:28,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2022-07-14 06:57:29,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 53 [2022-07-14 06:57:29,866 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:57:29,866 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2022-07-14 06:57:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:57:30,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:30,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1397393229] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:30,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:57:30,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 41 [2022-07-14 06:57:30,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719513409] [2022-07-14 06:57:30,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:57:30,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:57:30,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:57:30,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2056, Unknown=6, NotChecked=0, Total=2256 [2022-07-14 06:57:30,356 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:57:31,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:31,729 INFO L93 Difference]: Finished difference Result 102 states and 109 transitions. [2022-07-14 06:57:31,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:57:31,729 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2022-07-14 06:57:31,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:31,730 INFO L225 Difference]: With dead ends: 102 [2022-07-14 06:57:31,730 INFO L226 Difference]: Without dead ends: 102 [2022-07-14 06:57:31,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1102 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=271, Invalid=2690, Unknown=9, NotChecked=0, Total=2970 [2022-07-14 06:57:31,732 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 25 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:31,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 556 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 250 Invalid, 0 Unknown, 271 Unchecked, 0.5s Time] [2022-07-14 06:57:31,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-14 06:57:31,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-07-14 06:57:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.355263157894737) internal successors, (103), 96 states have internal predecessors, (103), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:31,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2022-07-14 06:57:31,735 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 46 [2022-07-14 06:57:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:31,735 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2022-07-14 06:57:31,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.7567567567567568) internal successors, (65), 35 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:57:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2022-07-14 06:57:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:57:31,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:31,736 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:31,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-07-14 06:57:31,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-07-14 06:57:32,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:32,141 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:32,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:32,141 INFO L85 PathProgramCache]: Analyzing trace with hash -710984887, now seen corresponding path program 1 times [2022-07-14 06:57:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:32,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763512840] [2022-07-14 06:57:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:32,142 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:32,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:32,143 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:32,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-14 06:57:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-14 06:57:32,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:32,444 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:32,450 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:32,835 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:57:32,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-14 06:57:32,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:57:33,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:33,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:33,300 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:57:33,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2022-07-14 06:57:33,307 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 06:57:33,659 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-07-14 06:57:33,659 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 52 [2022-07-14 06:57:33,676 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:57:33,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 16 [2022-07-14 06:57:33,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:57:33,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:57:34,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:34,218 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:57:34,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 80 [2022-07-14 06:57:34,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:34,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:34,242 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:57:34,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 77 [2022-07-14 06:57:34,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:34,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-07-14 06:57:34,309 INFO L356 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-07-14 06:57:34,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 40 [2022-07-14 06:57:34,960 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-07-14 06:57:34,960 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 59 [2022-07-14 06:57:34,973 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:57:34,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2022-07-14 06:57:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:57:35,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:36,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:36,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763512840] [2022-07-14 06:57:36,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763512840] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:36,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1359453915] [2022-07-14 06:57:36,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:36,368 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:57:36,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:57:36,369 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:57:36,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-07-14 06:57:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:36,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-14 06:57:36,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:36,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:36,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:37,725 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:57:37,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:57:37,761 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:57:37,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-14 06:57:38,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:38,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:38,822 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:57:38,823 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 54 [2022-07-14 06:57:38,831 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 06:57:39,495 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:57:39,495 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 44 [2022-07-14 06:57:39,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 10 [2022-07-14 06:57:39,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-14 06:57:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:39,999 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:57:39,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 81 [2022-07-14 06:57:40,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:40,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:40,023 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:57:40,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 82 [2022-07-14 06:57:40,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:40,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-07-14 06:57:40,073 INFO L356 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-07-14 06:57:40,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 41 [2022-07-14 06:57:41,360 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:57:41,360 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 50 [2022-07-14 06:57:41,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 13 [2022-07-14 06:57:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:57:41,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:42,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1359453915] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:42,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:57:42,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 42 [2022-07-14 06:57:42,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882293386] [2022-07-14 06:57:42,034 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:57:42,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 06:57:42,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:42,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 06:57:42,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2146, Unknown=9, NotChecked=0, Total=2352 [2022-07-14 06:57:42,036 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 43 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 36 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:57:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:43,426 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2022-07-14 06:57:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:57:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 36 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2022-07-14 06:57:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:43,427 INFO L225 Difference]: With dead ends: 155 [2022-07-14 06:57:43,427 INFO L226 Difference]: Without dead ends: 155 [2022-07-14 06:57:43,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=250, Invalid=2705, Unknown=15, NotChecked=0, Total=2970 [2022-07-14 06:57:43,429 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 76 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:43,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 734 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 190 Invalid, 0 Unknown, 354 Unchecked, 0.4s Time] [2022-07-14 06:57:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-14 06:57:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 110. [2022-07-14 06:57:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 104 states have internal predecessors, (113), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:43,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2022-07-14 06:57:43,433 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 46 [2022-07-14 06:57:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:43,433 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2022-07-14 06:57:43,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 36 states have internal predecessors, (65), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:57:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2022-07-14 06:57:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-14 06:57:43,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:43,434 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:57:43,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:43,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-07-14 06:57:43,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:43,835 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:43,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:43,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1827931507, now seen corresponding path program 1 times [2022-07-14 06:57:43,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:43,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212252427] [2022-07-14 06:57:43,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:57:43,836 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:43,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:43,837 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:43,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-14 06:57:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:57:44,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-14 06:57:44,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-14 06:57:44,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-14 06:57:44,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:44,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212252427] [2022-07-14 06:57:44,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212252427] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:57:44,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:57:44,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:57:44,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223684034] [2022-07-14 06:57:44,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:57:44,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:57:44,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:57:44,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:57:44,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:57:44,060 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:57:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:57:44,238 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2022-07-14 06:57:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:57:44,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-07-14 06:57:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:57:44,240 INFO L225 Difference]: With dead ends: 126 [2022-07-14 06:57:44,240 INFO L226 Difference]: Without dead ends: 126 [2022-07-14 06:57:44,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:57:44,241 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 50 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:57:44,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 94 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:57:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-14 06:57:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 103. [2022-07-14 06:57:44,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 79 states have (on average 1.3164556962025316) internal successors, (104), 97 states have internal predecessors, (104), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:57:44,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2022-07-14 06:57:44,244 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 49 [2022-07-14 06:57:44,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:57:44,244 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2022-07-14 06:57:44,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-14 06:57:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2022-07-14 06:57:44,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 06:57:44,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:57:44,245 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-07-14 06:57:44,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-14 06:57:44,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:57:44,451 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:57:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:57:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 555333, now seen corresponding path program 2 times [2022-07-14 06:57:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:57:44,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751559841] [2022-07-14 06:57:44,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:57:44,452 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:57:44,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:57:44,454 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:57:44,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-14 06:57:44,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:57:44,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:57:44,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-14 06:57:44,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:44,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:44,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:57:44,917 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:57:44,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-14 06:57:45,371 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-14 06:57:45,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 42 [2022-07-14 06:57:45,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:45,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:45,907 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-14 06:57:45,908 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 52 [2022-07-14 06:57:45,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-07-14 06:57:46,367 INFO L356 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2022-07-14 06:57:46,367 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 80 [2022-07-14 06:57:46,389 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-14 06:57:46,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 22 [2022-07-14 06:57:46,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-07-14 06:57:46,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:47,004 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-07-14 06:57:47,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 130 [2022-07-14 06:57:47,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:47,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:47,062 INFO L356 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2022-07-14 06:57:47,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 139 treesize of output 128 [2022-07-14 06:57:47,148 INFO L356 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2022-07-14 06:57:47,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 49 [2022-07-14 06:57:48,847 INFO L356 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2022-07-14 06:57:48,848 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 94 [2022-07-14 06:57:48,867 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-07-14 06:57:48,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 28 [2022-07-14 06:57:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:57:49,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:57:50,045 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:57:50,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751559841] [2022-07-14 06:57:50,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751559841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:57:50,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1044123727] [2022-07-14 06:57:50,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:57:50,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:57:50,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:57:50,047 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:57:50,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-07-14 06:57:50,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:57:50,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:57:50,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-14 06:57:50,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:57:50,577 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:57:51,516 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:57:51,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-14 06:57:51,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:51,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:57:52,456 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-14 06:57:52,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 41 [2022-07-14 06:57:52,462 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 06:57:53,141 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-07-14 06:57:53,142 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 44 [2022-07-14 06:57:53,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 10 [2022-07-14 06:57:53,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:57:53,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:53,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:53,928 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:57:53,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 88 [2022-07-14 06:57:53,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:57:53,976 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-07-14 06:57:53,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 90 [2022-07-14 06:57:54,038 INFO L356 Elim1Store]: treesize reduction 78, result has 42.2 percent of original size [2022-07-14 06:57:54,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 77 [2022-07-14 06:57:55,326 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-14 06:57:55,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 86 [2022-07-14 06:57:56,211 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-07-14 06:57:56,211 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 44 [2022-07-14 06:58:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:58:02,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:58:04,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1044123727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:58:04,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:58:04,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 56 [2022-07-14 06:58:04,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191824076] [2022-07-14 06:58:04,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:58:04,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-14 06:58:04,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:58:04,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-14 06:58:04,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4810, Unknown=38, NotChecked=0, Total=5112 [2022-07-14 06:58:04,688 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand has 56 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 47 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:58:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:58:22,604 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-07-14 06:58:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:58:22,605 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 47 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2022-07-14 06:58:22,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:58:22,605 INFO L225 Difference]: With dead ends: 89 [2022-07-14 06:58:22,605 INFO L226 Difference]: Without dead ends: 89 [2022-07-14 06:58:22,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=485, Invalid=8210, Unknown=47, NotChecked=0, Total=8742 [2022-07-14 06:58:22,613 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 24 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:58:22,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1195 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 506 Invalid, 0 Unknown, 386 Unchecked, 1.1s Time] [2022-07-14 06:58:22,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-14 06:58:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-07-14 06:58:22,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 82 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:58:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-07-14 06:58:22,618 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 51 [2022-07-14 06:58:22,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:58:22,618 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-07-14 06:58:22,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 1.7307692307692308) internal successors, (90), 47 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:58:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-07-14 06:58:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:58:22,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:58:22,619 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:58:22,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2022-07-14 06:58:22,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-07-14 06:58:23,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:58:23,024 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:58:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:58:23,024 INFO L85 PathProgramCache]: Analyzing trace with hash 430095050, now seen corresponding path program 1 times [2022-07-14 06:58:23,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:58:23,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610675999] [2022-07-14 06:58:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:58:23,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:58:23,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:58:23,026 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:58:23,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-14 06:58:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:58:23,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-14 06:58:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:58:23,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:58:23,779 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 6 treesize of output 5 [2022-07-14 06:58:24,089 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:58:24,090 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:58:24,095 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 06:58:24,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:58:24,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:58:24,877 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-14 06:58:24,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 30 [2022-07-14 06:58:24,996 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-14 06:58:24,997 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 46 treesize of output 22 [2022-07-14 06:58:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:58:25,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:58:27,319 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_sll_circular_prepend_~last~1#1.base| (_ BitVec 32))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_prepend_~last~1#1.base| (store (select |c_#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_prepend_~last~1#1.base|) |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.offset| |c_ULTIMATE.start_sll_circular_prepend_~new_head~1#1.base|)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (_ bv1 1))) is different from false [2022-07-14 06:58:27,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2022-07-14 06:58:28,077 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 17 treesize of output 15 [2022-07-14 06:58:28,099 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 17 treesize of output 15 [2022-07-14 06:58:28,206 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:58:28,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610675999] [2022-07-14 06:58:28,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610675999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:58:28,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1564338113] [2022-07-14 06:58:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:58:28,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:58:28,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:58:28,207 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:58:28,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-07-14 06:58:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:58:28,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-14 06:58:28,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:58:28,726 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:58:29,514 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:58:29,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-14 06:58:30,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:58:30,405 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:58:30,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2022-07-14 06:58:30,954 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:58:30,955 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 28 [2022-07-14 06:58:30,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-14 06:58:30,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:58:31,892 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-07-14 06:58:31,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 61 [2022-07-14 06:58:31,921 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:58:31,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 50 [2022-07-14 06:58:31,956 INFO L356 Elim1Store]: treesize reduction 8, result has 70.4 percent of original size [2022-07-14 06:58:31,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 35 [2022-07-14 06:58:31,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-07-14 06:58:32,026 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 38 treesize of output 32 [2022-07-14 06:58:32,080 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 26 treesize of output 20 [2022-07-14 06:58:32,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2022-07-14 06:58:33,490 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:58:33,490 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 26 [2022-07-14 06:58:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:58:33,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:58:34,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1564338113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:58:34,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:58:34,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28] total 50 [2022-07-14 06:58:34,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346879396] [2022-07-14 06:58:34,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:58:34,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-14 06:58:34,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:58:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-14 06:58:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3421, Unknown=7, NotChecked=118, Total=3782 [2022-07-14 06:58:34,574 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 50 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 41 states have internal predecessors, (92), 5 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 06:58:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:58:38,125 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-07-14 06:58:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:58:38,125 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 41 states have internal predecessors, (92), 5 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2022-07-14 06:58:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:58:38,126 INFO L225 Difference]: With dead ends: 104 [2022-07-14 06:58:38,126 INFO L226 Difference]: Without dead ends: 104 [2022-07-14 06:58:38,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=406, Invalid=5908, Unknown=10, NotChecked=156, Total=6480 [2022-07-14 06:58:38,128 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 27 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:58:38,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1212 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 231 Invalid, 0 Unknown, 448 Unchecked, 0.5s Time] [2022-07-14 06:58:38,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-14 06:58:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2022-07-14 06:58:38,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.2647058823529411) internal successors, (86), 82 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:58:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-07-14 06:58:38,131 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 52 [2022-07-14 06:58:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:58:38,131 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-07-14 06:58:38,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.9574468085106382) internal successors, (92), 41 states have internal predecessors, (92), 5 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-14 06:58:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-07-14 06:58:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:58:38,132 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:58:38,132 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:58:38,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-07-14 06:58:38,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:58:38,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 06:58:38,544 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:58:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:58:38,544 INFO L85 PathProgramCache]: Analyzing trace with hash 888325895, now seen corresponding path program 1 times [2022-07-14 06:58:38,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:58:38,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432951622] [2022-07-14 06:58:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:58:38,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:58:38,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:58:38,546 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:58:38,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-14 06:58:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:58:38,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-14 06:58:38,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:58:38,929 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:58:38,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:58:38,966 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 06:58:38,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:58:41,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:58:41,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:58:41,124 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:58:41,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 12 [2022-07-14 06:58:41,180 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:58:43,385 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:58:43,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:58:43,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:58:43,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:58:43,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:58:43,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:58:43,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-14 06:58:45,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:58:46,425 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:58:46,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:58:46,434 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 06:58:46,486 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:58:46,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-07-14 06:58:46,512 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:58:46,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-07-14 06:58:46,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-14 06:58:47,499 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:58:47,500 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 2 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 06:58:47,839 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:58:47,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2022-07-14 06:58:48,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:58:48,607 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-14 06:58:48,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2022-07-14 06:58:48,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-07-14 06:58:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:58:49,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:58:49,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2022-07-14 06:58:52,773 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 17 treesize of output 15 [2022-07-14 06:58:53,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 06:58:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432951622] [2022-07-14 06:58:53,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432951622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:58:53,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [670727803] [2022-07-14 06:58:53,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:58:53,465 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 06:58:53,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 06:58:53,466 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 06:58:53,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-07-14 06:58:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:58:53,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-14 06:58:53,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:58:54,237 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:58:54,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-14 06:58:55,628 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 06:58:55,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-14 06:58:56,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:58:56,985 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 06:58:56,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-14 06:58:57,961 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:58:57,962 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 31 [2022-07-14 06:58:57,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-14 06:58:57,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:58:59,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:58:59,306 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 06:58:59,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 66 [2022-07-14 06:58:59,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:58:59,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 65 [2022-07-14 06:58:59,398 INFO L356 Elim1Store]: treesize reduction 78, result has 42.2 percent of original size [2022-07-14 06:58:59,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 78 [2022-07-14 06:59:00,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 63 [2022-07-14 06:59:01,861 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-14 06:59:01,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 50 [2022-07-14 06:59:03,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:59:03,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:59:03,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2022-07-14 06:59:04,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-07-14 06:59:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:59:05,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:59:05,419 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:59:05,419 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 20 treesize of output 21 [2022-07-14 06:59:05,435 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:59:05,436 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 34 treesize of output 37 [2022-07-14 06:59:05,441 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 9 [2022-07-14 06:59:15,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [670727803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:59:15,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 06:59:15,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 58 [2022-07-14 06:59:15,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481733712] [2022-07-14 06:59:15,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 06:59:15,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-14 06:59:15,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 06:59:15,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-14 06:59:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=5764, Unknown=26, NotChecked=0, Total=6162 [2022-07-14 06:59:15,166 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 59 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 48 states have internal predecessors, (101), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:59:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:59:29,286 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-07-14 06:59:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:59:29,287 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 48 states have internal predecessors, (101), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2022-07-14 06:59:29,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:59:29,288 INFO L225 Difference]: With dead ends: 90 [2022-07-14 06:59:29,288 INFO L226 Difference]: Without dead ends: 90 [2022-07-14 06:59:29,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2736 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=612, Invalid=10061, Unknown=39, NotChecked=0, Total=10712 [2022-07-14 06:59:29,291 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 14 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 631 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:59:29,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1130 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 631 Unchecked, 0.3s Time] [2022-07-14 06:59:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-14 06:59:29,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-07-14 06:59:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 83 states have internal predecessors, (88), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 06:59:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-07-14 06:59:29,294 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 57 [2022-07-14 06:59:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:59:29,295 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-07-14 06:59:29,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 48 states have internal predecessors, (101), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 06:59:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-07-14 06:59:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:59:29,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:59:29,296 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:59:29,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:59:29,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-07-14 06:59:29,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-14 06:59:29,704 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 06:59:29,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:59:29,704 INFO L85 PathProgramCache]: Analyzing trace with hash 888325896, now seen corresponding path program 1 times [2022-07-14 06:59:29,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 06:59:29,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1692984766] [2022-07-14 06:59:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:59:29,705 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 06:59:29,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 06:59:29,706 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 06:59:29,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-14 06:59:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:59:30,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-14 06:59:30,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:59:30,127 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:59:30,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:59:30,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-07-14 06:59:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:59:30,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:59:30,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:59:30,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:59:30,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-14 06:59:30,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:59:30,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:59:30,418 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:59:30,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-07-14 06:59:30,556 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 06:59:32,861 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:59:32,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-14 06:59:33,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 06:59:33,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:59:33,604 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:59:33,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-07-14 06:59:36,550 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:59:36,550 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 1 case distinctions, treesize of input 20 treesize of output 26 [2022-07-14 06:59:36,581 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:59:36,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 18 treesize of output 24 [2022-07-14 06:59:36,705 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:59:36,706 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-14 06:59:36,714 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 06:59:37,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-07-14 06:59:38,318 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:59:38,319 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 2 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 06:59:39,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:59:39,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:59:40,264 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-14 06:59:40,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2022-07-14 06:59:40,314 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-14 06:59:40,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 06:59:40,819 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:59:40,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 19 [2022-07-14 06:59:40,846 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-14 06:59:40,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2022-07-14 06:59:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:59:44,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:59:45,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2022-07-14 06:59:45,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 194 [2022-07-14 06:59:45,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 398 treesize of output 382 [2022-07-14 07:00:01,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-14 07:00:01,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1692984766] [2022-07-14 07:00:01,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1692984766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:01,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [731582249] [2022-07-14 07:00:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:01,521 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-14 07:00:01,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-14 07:00:01,522 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-14 07:00:01,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-07-14 07:00:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:02,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-14 07:00:02,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:02,480 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 07:00:03,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-07-14 07:00:04,270 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 07:00:04,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2022-07-14 07:00:05,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 07:00:05,883 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 07:00:05,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-14 07:00:07,146 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 07:00:07,146 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 31 [2022-07-14 07:00:07,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-07-14 07:00:07,166 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 07:00:07,445 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 07:00:08,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:08,876 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 07:00:08,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 66 [2022-07-14 07:00:08,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:08,894 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 69 treesize of output 65 [2022-07-14 07:00:08,937 INFO L356 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-07-14 07:00:08,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 41 [2022-07-14 07:00:10,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 46 [2022-07-14 07:00:11,244 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-14 07:00:11,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 32 [2022-07-14 07:00:12,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 07:00:12,248 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 07:00:12,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:12,636 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 31 treesize of output 29 [2022-07-14 07:00:12,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:12,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 07:00:13,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2022-07-14 07:00:13,167 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 07:00:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 07:00:13,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 07:00:13,954 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2428 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2429 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_2429) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_2428) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_2429 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_prepend_~last~1#1.base| v_ArrVal_2429) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0))))) is different from false [2022-07-14 07:00:13,970 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:13,971 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 37 treesize of output 30 [2022-07-14 07:00:13,995 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:13,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2022-07-14 07:00:14,004 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 15 treesize of output 11 [2022-07-14 07:00:14,074 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:14,074 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 37 treesize of output 38 [2022-07-14 07:00:14,089 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 07:00:14,089 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 29 treesize of output 30 [2022-07-14 07:00:14,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:14,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-07-14 07:00:14,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 07:00:14,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-07-14 07:00:19,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [731582249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 07:00:19,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-14 07:00:19,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 59 [2022-07-14 07:00:19,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668087018] [2022-07-14 07:00:19,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-14 07:00:19,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-14 07:00:19,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-14 07:00:19,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-14 07:00:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=5781, Unknown=22, NotChecked=154, Total=6320 [2022-07-14 07:00:19,316 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 60 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 49 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 07:00:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 07:00:34,198 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-07-14 07:00:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-14 07:00:34,200 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 49 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2022-07-14 07:00:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 07:00:34,200 INFO L225 Difference]: With dead ends: 96 [2022-07-14 07:00:34,200 INFO L226 Difference]: Without dead ends: 96 [2022-07-14 07:00:34,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2971 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=647, Invalid=11098, Unknown=31, NotChecked=214, Total=11990 [2022-07-14 07:00:34,201 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 14 mSDsluCounter, 1735 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 601 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 07:00:34,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1790 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 258 Invalid, 0 Unknown, 601 Unchecked, 0.5s Time] [2022-07-14 07:00:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-14 07:00:34,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-07-14 07:00:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 75 states have (on average 1.24) internal successors, (93), 89 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 07:00:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2022-07-14 07:00:34,204 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 57 [2022-07-14 07:00:34,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 07:00:34,205 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2022-07-14 07:00:34,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 55 states have (on average 1.8545454545454545) internal successors, (102), 49 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-14 07:00:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2022-07-14 07:00:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-14 07:00:34,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 07:00:34,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 07:00:34,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:34,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-07-14 07:00:34,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-14 07:00:34,619 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2022-07-14 07:00:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 07:00:34,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1017304566, now seen corresponding path program 1 times [2022-07-14 07:00:34,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-14 07:00:34,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722597231] [2022-07-14 07:00:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 07:00:34,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-14 07:00:34,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-14 07:00:34,621 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-14 07:00:34,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-07-14 07:00:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 07:00:35,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-14 07:00:35,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 07:00:35,047 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-14 07:00:35,071 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 07:00:35,278 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-14 07:00:35,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2022-07-14 07:00:35,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 07:00:35,566 INFO L356 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2022-07-14 07:00:35,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 42 [2022-07-14 07:00:35,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 07:00:36,054 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-14 07:00:36,055 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-07-14 07:00:36,440 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-14 07:00:36,440 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 31 [2022-07-14 07:00:36,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2022-07-14 07:00:36,735 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 07:00:37,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:37,026 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-14 07:00:37,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 72 [2022-07-14 07:00:37,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:37,035 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 62 treesize of output 60 [2022-07-14 07:00:37,088 INFO L356 Elim1Store]: treesize reduction 12, result has 70.7 percent of original size [2022-07-14 07:00:37,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 50 [2022-07-14 07:00:37,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 44 [2022-07-14 07:00:38,591 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-14 07:00:38,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 33 [2022-07-14 07:00:39,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-07-14 07:00:39,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 07:00:39,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 07:00:39,234 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 07:00:39,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 07:00:39,452 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 33 treesize of output 31 [2022-07-14 07:00:39,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 07:00:39,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-14 07:00:39,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-14 07:00:39,667 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 07:00:39,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 07:00:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 07:00:40,071 INFO L328 TraceCheckSpWp]: Computing backward predicates...