./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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_remove_all_reverse.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 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:35:31,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:35:31,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:35:31,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:35:31,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:35:31,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:35:31,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:35:31,589 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:35:31,594 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:35:31,595 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:35:31,596 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:35:31,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:35:31,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:35:31,600 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:35:31,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:35:31,603 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:35:31,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:35:31,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:35:31,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:35:31,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:35:31,612 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:35:31,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:35:31,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:35:31,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:35:31,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:35:31,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:35:31,625 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:35:31,625 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:35:31,626 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:35:31,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:35:31,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:35:31,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:35:31,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:35:31,629 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:35:31,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:35:31,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:35:31,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:35:31,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:35:31,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:35:31,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:35:31,632 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:35:31,633 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:35:31,635 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 06:35:31,653 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:35:31,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:35:31,653 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:35:31,654 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:35:31,654 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:35:31,654 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:35:31,655 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:35:31,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:35:31,655 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:35:31,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:35:31,655 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:35:31,655 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:35:31,656 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:35:31,656 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:35:31,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:35:31,656 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:35:31,656 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:35:31,656 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:35:31,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:35:31,657 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:35:31,657 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:35:31,657 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:35:31,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:35:31,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:35:31,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:35:31,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:35:31,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:35:31,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:35:31,658 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 06:35:31,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 06:35:31,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 [2022-07-23 06:35:31,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:35:31,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:35:31,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:35:31,915 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:35:31,916 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:35:31,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2022-07-23 06:35:31,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db73da98e/0eb3da406c0344f786fa368629de7624/FLAGb2d3360b3 [2022-07-23 06:35:32,359 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:35:32,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2022-07-23 06:35:32,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db73da98e/0eb3da406c0344f786fa368629de7624/FLAGb2d3360b3 [2022-07-23 06:35:32,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db73da98e/0eb3da406c0344f786fa368629de7624 [2022-07-23 06:35:32,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:35:32,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:35:32,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:35:32,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:35:32,388 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:35:32,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d45574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32, skipping insertion in model container [2022-07-23 06:35:32,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:35:32,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:35:32,663 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_remove_all_reverse.i[24151,24164] [2022-07-23 06:35:32,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:35:32,674 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:35:32,708 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_remove_all_reverse.i[24151,24164] [2022-07-23 06:35:32,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:35:32,729 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:35:32,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32 WrapperNode [2022-07-23 06:35:32,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:35:32,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:35:32,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:35:32,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:35:32,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,760 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,781 INFO L137 Inliner]: procedures = 126, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 125 [2022-07-23 06:35:32,782 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:35:32,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:35:32,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:35:32,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:35:32,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,814 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:35:32,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:35:32,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:35:32,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:35:32,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (1/1) ... [2022-07-23 06:35:32,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:35:32,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:35:32,860 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) [2022-07-23 06:35:32,886 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 [2022-07-23 06:35:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 06:35:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-23 06:35:32,900 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-23 06:35:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:35:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:35:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 06:35:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:35:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:35:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:35:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:35:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 06:35:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:35:32,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:35:32,968 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:35:32,970 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:35:33,239 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:35:33,244 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:35:33,244 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 06:35:33,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:35:33 BoogieIcfgContainer [2022-07-23 06:35:33,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:35:33,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:35:33,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:35:33,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:35:33,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:35:32" (1/3) ... [2022-07-23 06:35:33,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467d706a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:35:33, skipping insertion in model container [2022-07-23 06:35:33,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:32" (2/3) ... [2022-07-23 06:35:33,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467d706a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:35:33, skipping insertion in model container [2022-07-23 06:35:33,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:35:33" (3/3) ... [2022-07-23 06:35:33,253 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2022-07-23 06:35:33,262 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:35:33,262 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-07-23 06:35:33,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:35:33,301 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@6dc52474, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5fb39347 [2022-07-23 06:35:33,301 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-07-23 06:35:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 93 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:33,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 06:35:33,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:33,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 06:35:33,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:33,326 INFO L85 PathProgramCache]: Analyzing trace with hash 894197909, now seen corresponding path program 1 times [2022-07-23 06:35:33,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:35:33,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292224780] [2022-07-23 06:35:33,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:33,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:35:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:35:33,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:35:33,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292224780] [2022-07-23 06:35:33,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292224780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:33,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:35:33,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:35:33,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62141594] [2022-07-23 06:35:33,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:33,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:35:33,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:35:33,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:35:33,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:35:33,520 INFO L87 Difference]: Start difference. First operand has 97 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 93 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-07-23 06:35:33,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:33,617 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2022-07-23 06:35:33,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:35:33,618 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 [2022-07-23 06:35:33,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:33,627 INFO L225 Difference]: With dead ends: 95 [2022-07-23 06:35:33,628 INFO L226 Difference]: Without dead ends: 92 [2022-07-23 06:35:33,629 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 [2022-07-23 06:35:33,632 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:33,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:35:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-23 06:35:33,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-23 06:35:33,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 88 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-07-23 06:35:33,666 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 6 [2022-07-23 06:35:33,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:33,666 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-07-23 06:35:33,666 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) [2022-07-23 06:35:33,667 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-07-23 06:35:33,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 06:35:33,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:33,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 06:35:33,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 06:35:33,668 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:33,669 INFO L85 PathProgramCache]: Analyzing trace with hash 894197910, now seen corresponding path program 1 times [2022-07-23 06:35:33,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:35:33,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344650959] [2022-07-23 06:35:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:33,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:35:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:35:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:35:33,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344650959] [2022-07-23 06:35:33,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344650959] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:33,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:35:33,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:35:33,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268348011] [2022-07-23 06:35:33,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:33,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:35:33,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:35:33,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:35:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:35:33,750 INFO L87 Difference]: Start difference. First operand 92 states and 97 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) [2022-07-23 06:35:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:33,801 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-07-23 06:35:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:35:33,802 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 [2022-07-23 06:35:33,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:33,803 INFO L225 Difference]: With dead ends: 90 [2022-07-23 06:35:33,803 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 06:35:33,803 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 [2022-07-23 06:35:33,804 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 4 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:33,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 146 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:35:33,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 06:35:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-23 06:35:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-07-23 06:35:33,810 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 6 [2022-07-23 06:35:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:33,810 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-07-23 06:35:33,810 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) [2022-07-23 06:35:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-07-23 06:35:33,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 06:35:33,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:33,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:33,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 06:35:33,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:33,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1984336343, now seen corresponding path program 1 times [2022-07-23 06:35:33,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:35:33,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740013287] [2022-07-23 06:35:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:33,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:35:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:33,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:35:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:33,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:35:33,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:35:33,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740013287] [2022-07-23 06:35:33,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740013287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:33,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:35:33,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:35:33,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317451732] [2022-07-23 06:35:33,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:33,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:35:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:35:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:35:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:35:33,864 INFO L87 Difference]: Start difference. First operand 90 states and 95 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) [2022-07-23 06:35:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:33,932 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2022-07-23 06:35:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:35:33,933 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 [2022-07-23 06:35:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:33,934 INFO L225 Difference]: With dead ends: 97 [2022-07-23 06:35:33,934 INFO L226 Difference]: Without dead ends: 97 [2022-07-23 06:35:33,934 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 [2022-07-23 06:35:33,935 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 5 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:33,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 216 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:35:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-23 06:35:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2022-07-23 06:35:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.84) internal successors, (92), 87 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-07-23 06:35:33,941 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 13 [2022-07-23 06:35:33,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:33,941 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-07-23 06:35:33,941 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) [2022-07-23 06:35:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-07-23 06:35:33,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 06:35:33,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:33,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:33,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 06:35:33,943 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:33,943 INFO L85 PathProgramCache]: Analyzing trace with hash 305697820, now seen corresponding path program 1 times [2022-07-23 06:35:33,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:35:33,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302496931] [2022-07-23 06:35:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:33,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:35:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:33,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:35:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:33,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 06:35:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 06:35:34,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:35:34,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302496931] [2022-07-23 06:35:34,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302496931] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:34,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:35:34,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:35:34,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545587487] [2022-07-23 06:35:34,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:34,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:35:34,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:35:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:35:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:35:34,017 INFO L87 Difference]: Start difference. First operand 91 states and 96 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) [2022-07-23 06:35:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:34,178 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2022-07-23 06:35:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:35:34,178 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 [2022-07-23 06:35:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:34,182 INFO L225 Difference]: With dead ends: 144 [2022-07-23 06:35:34,182 INFO L226 Difference]: Without dead ends: 144 [2022-07-23 06:35:34,182 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 [2022-07-23 06:35:34,191 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 67 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:34,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 277 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:35:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-23 06:35:34,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2022-07-23 06:35:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 50 states have (on average 1.82) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:34,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-07-23 06:35:34,202 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 22 [2022-07-23 06:35:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:34,203 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-07-23 06:35:34,203 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) [2022-07-23 06:35:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-07-23 06:35:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 06:35:34,204 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:34,204 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:34,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 06:35:34,204 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:34,205 INFO L85 PathProgramCache]: Analyzing trace with hash 305697821, now seen corresponding path program 1 times [2022-07-23 06:35:34,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:35:34,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445327505] [2022-07-23 06:35:34,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:34,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:35:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:34,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:35:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:34,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 06:35:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:35:34,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:35:34,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445327505] [2022-07-23 06:35:34,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445327505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:34,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:35:34,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 06:35:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292930036] [2022-07-23 06:35:34,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:34,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 06:35:34,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:35:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 06:35:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:35:34,339 INFO L87 Difference]: Start difference. First operand 90 states and 95 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) [2022-07-23 06:35:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:34,481 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-07-23 06:35:34,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:35:34,482 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 [2022-07-23 06:35:34,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:34,483 INFO L225 Difference]: With dead ends: 90 [2022-07-23 06:35:34,483 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 06:35:34,483 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 [2022-07-23 06:35:34,484 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 81 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:34,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 256 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:35:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 06:35:34,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-07-23 06:35:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 50 states have (on average 1.8) internal successors, (90), 85 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:34,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-07-23 06:35:34,493 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 22 [2022-07-23 06:35:34,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:34,493 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-07-23 06:35:34,493 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) [2022-07-23 06:35:34,493 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-07-23 06:35:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 06:35:34,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:34,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:34,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 06:35:34,495 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:34,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:34,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1713076933, now seen corresponding path program 1 times [2022-07-23 06:35:34,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:35:34,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494934487] [2022-07-23 06:35:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:34,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:35:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:34,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:35:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:34,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 06:35:34,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:35:34,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:35:34,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494934487] [2022-07-23 06:35:34,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494934487] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:35:34,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800299933] [2022-07-23 06:35:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:34,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:35:34,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:35:34,611 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) [2022-07-23 06:35:34,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 06:35:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:34,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 06:35:34,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:34,775 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 [2022-07-23 06:35:34,947 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 06:35:34,947 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 17 treesize of output 21 [2022-07-23 06:35:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:35:34,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:35:34,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800299933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:35:34,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:35:34,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-07-23 06:35:34,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184722093] [2022-07-23 06:35:34,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:35:34,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 06:35:34,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:35:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 06:35:34,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:35:34,996 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:35:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:35,150 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2022-07-23 06:35:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 06:35:35,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-07-23 06:35:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:35,151 INFO L225 Difference]: With dead ends: 141 [2022-07-23 06:35:35,151 INFO L226 Difference]: Without dead ends: 141 [2022-07-23 06:35:35,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-23 06:35:35,152 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 65 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:35,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 353 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 271 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-07-23 06:35:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-23 06:35:35,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 88. [2022-07-23 06:35:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 50 states have (on average 1.78) internal successors, (89), 84 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-07-23 06:35:35,155 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 25 [2022-07-23 06:35:35,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:35,156 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-07-23 06:35:35,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-23 06:35:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-07-23 06:35:35,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 06:35:35,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:35,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:35,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 06:35:35,376 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 [2022-07-23 06:35:35,377 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1713076934, now seen corresponding path program 1 times [2022-07-23 06:35:35,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:35:35,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37556984] [2022-07-23 06:35:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:35,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:35:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:35,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:35:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:35,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 06:35:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:35:35,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:35:35,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37556984] [2022-07-23 06:35:35,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37556984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:35:35,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002413537] [2022-07-23 06:35:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:35,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:35:35,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:35:35,532 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) [2022-07-23 06:35:35,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 06:35:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:35,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-23 06:35:35,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:35,628 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 [2022-07-23 06:35:35,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:35:35,833 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 14 treesize of output 16 [2022-07-23 06:35:35,839 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:35:35,840 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 [2022-07-23 06:35:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:35:35,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:35:40,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002413537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:35:40,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:35:40,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2022-07-23 06:35:40,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408468998] [2022-07-23 06:35:40,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:35:40,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 06:35:40,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:35:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 06:35:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:35:40,040 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 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) [2022-07-23 06:35:40,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:40,391 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2022-07-23 06:35:40,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:35:40,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 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 [2022-07-23 06:35:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:40,393 INFO L225 Difference]: With dead ends: 141 [2022-07-23 06:35:40,393 INFO L226 Difference]: Without dead ends: 141 [2022-07-23 06:35:40,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-07-23 06:35:40,394 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 140 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:40,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 441 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 673 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-23 06:35:40,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-07-23 06:35:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2022-07-23 06:35:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 50 states have (on average 1.76) internal successors, (88), 83 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2022-07-23 06:35:40,397 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 25 [2022-07-23 06:35:40,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:40,397 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2022-07-23 06:35:40,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 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) [2022-07-23 06:35:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2022-07-23 06:35:40,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:35:40,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:40,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:40,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 06:35:40,607 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 [2022-07-23 06:35:40,607 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:40,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:40,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1566263260, now seen corresponding path program 1 times [2022-07-23 06:35:40,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:35:40,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750534040] [2022-07-23 06:35:40,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:40,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:35:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:40,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:35:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:40,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 06:35:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:35:40,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:35:40,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750534040] [2022-07-23 06:35:40,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750534040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:35:40,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332553567] [2022-07-23 06:35:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:40,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:35:40,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:35:40,667 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) [2022-07-23 06:35:40,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 06:35:40,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:40,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:35:40,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:35:40,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:35:40,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332553567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:40,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 06:35:40,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-07-23 06:35:40,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678996104] [2022-07-23 06:35:40,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:40,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:35:40,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:35:40,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:35:40,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:35:40,770 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:35:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:40,780 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2022-07-23 06:35:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:35:40,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-23 06:35:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:40,781 INFO L225 Difference]: With dead ends: 146 [2022-07-23 06:35:40,781 INFO L226 Difference]: Without dead ends: 146 [2022-07-23 06:35:40,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:35:40,782 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 132 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:40,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 181 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:35:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-23 06:35:40,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2022-07-23 06:35:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 84 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2022-07-23 06:35:40,785 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 29 [2022-07-23 06:35:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:40,785 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2022-07-23 06:35:40,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:35:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2022-07-23 06:35:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:35:40,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:40,786 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:40,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 06:35:41,003 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 [2022-07-23 06:35:41,003 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:41,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1566263288, now seen corresponding path program 1 times [2022-07-23 06:35:41,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:35:41,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335689032] [2022-07-23 06:35:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:41,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:35:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:41,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:35:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:41,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 06:35:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 06:35:41,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:35:41,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335689032] [2022-07-23 06:35:41,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335689032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:35:41,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877797906] [2022-07-23 06:35:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:41,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:35:41,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:35:41,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 06:35:41,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 06:35:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:41,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 06:35:41,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:41,245 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 [2022-07-23 06:35:41,259 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 [2022-07-23 06:35:41,328 INFO L356 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-07-23 06:35:41,329 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 19 treesize of output 16 [2022-07-23 06:35:41,352 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 [2022-07-23 06:35:41,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:35:41,417 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 [2022-07-23 06:35:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:35:41,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:35:41,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877797906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:35:41,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:35:41,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2022-07-23 06:35:41,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140065445] [2022-07-23 06:35:41,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:35:41,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:35:41,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 06:35:41,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:35:41,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-07-23 06:35:41,474 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:35:41,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:41,666 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2022-07-23 06:35:41,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:35:41,666 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (4), 2 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 29 [2022-07-23 06:35:41,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:41,667 INFO L225 Difference]: With dead ends: 132 [2022-07-23 06:35:41,667 INFO L226 Difference]: Without dead ends: 132 [2022-07-23 06:35:41,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:35:41,668 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 244 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:41,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 298 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 285 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-07-23 06:35:41,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-23 06:35:41,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 85. [2022-07-23 06:35:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 81 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2022-07-23 06:35:41,670 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 29 [2022-07-23 06:35:41,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:41,671 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2022-07-23 06:35:41,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 06:35:41,671 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2022-07-23 06:35:41,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:35:41,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:41,671 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:41,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 06:35:41,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:35:41,879 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:41,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1566263287, now seen corresponding path program 1 times [2022-07-23 06:35:41,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 06:35:41,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150510534] [2022-07-23 06:35:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:41,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 06:35:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 06:35:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:41,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 06:35:42,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:35:42,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 06:35:42,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150510534] [2022-07-23 06:35:42,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150510534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:35:42,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7640431] [2022-07-23 06:35:42,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:42,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 06:35:42,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:35:42,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 06:35:42,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 06:35:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:42,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 06:35:42,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:42,156 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 [2022-07-23 06:35:42,172 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 [2022-07-23 06:35:42,252 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-23 06:35:42,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 06:35:42,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-23 06:35:42,471 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 55283 column 46: unknown constant v_#length_BEFORE_CALL_4 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) [2022-07-23 06:35:42,475 INFO L158 Benchmark]: Toolchain (without parser) took 10089.85ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 139.3MB in the beginning and 98.6MB in the end (delta: 40.7MB). Peak memory consumption was 77.0MB. Max. memory is 16.1GB. [2022-07-23 06:35:42,475 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 90.2MB. Free memory was 47.2MB in the beginning and 47.2MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:35:42,475 INFO L158 Benchmark]: CACSL2BoogieTranslator took 345.44ms. Allocated memory is still 172.0MB. Free memory was 139.3MB in the beginning and 138.8MB in the end (delta: 571.6kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-23 06:35:42,476 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.93ms. Allocated memory is still 172.0MB. Free memory was 138.8MB in the beginning and 136.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-23 06:35:42,476 INFO L158 Benchmark]: Boogie Preprocessor took 38.01ms. Allocated memory is still 172.0MB. Free memory was 136.7MB in the beginning and 135.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 06:35:42,476 INFO L158 Benchmark]: RCFGBuilder took 425.24ms. Allocated memory is still 172.0MB. Free memory was 135.2MB in the beginning and 117.3MB in the end (delta: 17.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-23 06:35:42,476 INFO L158 Benchmark]: TraceAbstraction took 9227.06ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 116.7MB in the beginning and 98.6MB in the end (delta: 18.1MB). Peak memory consumption was 56.5MB. Max. memory is 16.1GB. [2022-07-23 06:35:42,477 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 90.2MB. Free memory was 47.2MB in the beginning and 47.2MB in the end (delta: 40.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 345.44ms. Allocated memory is still 172.0MB. Free memory was 139.3MB in the beginning and 138.8MB in the end (delta: 571.6kB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.93ms. Allocated memory is still 172.0MB. Free memory was 138.8MB in the beginning and 136.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.01ms. Allocated memory is still 172.0MB. Free memory was 136.7MB in the beginning and 135.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 425.24ms. Allocated memory is still 172.0MB. Free memory was 135.2MB in the beginning and 117.3MB in the end (delta: 17.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 9227.06ms. Allocated memory was 172.0MB in the beginning and 207.6MB in the end (delta: 35.7MB). Free memory was 116.7MB in the beginning and 98.6MB in the end (delta: 18.1MB). Peak memory consumption was 56.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 55283 column 46: unknown constant v_#length_BEFORE_CALL_4 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 55283 column 46: unknown constant v_#length_BEFORE_CALL_4: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-23 06:35:42,495 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_remove_all_reverse.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 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 06:35:44,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 06:35:44,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 06:35:44,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 06:35:44,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 06:35:44,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 06:35:44,409 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 06:35:44,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 06:35:44,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 06:35:44,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 06:35:44,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 06:35:44,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 06:35:44,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 06:35:44,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 06:35:44,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 06:35:44,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 06:35:44,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 06:35:44,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 06:35:44,427 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 06:35:44,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 06:35:44,432 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 06:35:44,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 06:35:44,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 06:35:44,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 06:35:44,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 06:35:44,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 06:35:44,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 06:35:44,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 06:35:44,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 06:35:44,442 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 06:35:44,443 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 06:35:44,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 06:35:44,444 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 06:35:44,445 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 06:35:44,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 06:35:44,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 06:35:44,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 06:35:44,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 06:35:44,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 06:35:44,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 06:35:44,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 06:35:44,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 06:35:44,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-23 06:35:44,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 06:35:44,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 06:35:44,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 06:35:44,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 06:35:44,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 06:35:44,476 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 06:35:44,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 06:35:44,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 06:35:44,477 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 06:35:44,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 06:35:44,478 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 06:35:44,478 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 06:35:44,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 06:35:44,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 06:35:44,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 06:35:44,479 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 06:35:44,479 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 06:35:44,479 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 06:35:44,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 06:35:44,480 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 06:35:44,480 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-23 06:35:44,480 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-23 06:35:44,480 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 06:35:44,481 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 06:35:44,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 06:35:44,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 06:35:44,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 06:35:44,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:35:44,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 06:35:44,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 06:35:44,482 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-23 06:35:44,482 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-23 06:35:44,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-23 06:35:44,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3340815bef7e21ae2d4803d7059577c1761bb3b7b4bb24b2b34d5d0d0054fd10 [2022-07-23 06:35:44,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 06:35:44,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 06:35:44,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 06:35:44,755 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 06:35:44,756 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 06:35:44,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2022-07-23 06:35:44,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4614b6424/2625055a56d3476a990434e243c4ea04/FLAG278ed4da8 [2022-07-23 06:35:45,238 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 06:35:45,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2022-07-23 06:35:45,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4614b6424/2625055a56d3476a990434e243c4ea04/FLAG278ed4da8 [2022-07-23 06:35:45,620 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4614b6424/2625055a56d3476a990434e243c4ea04 [2022-07-23 06:35:45,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 06:35:45,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 06:35:45,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 06:35:45,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 06:35:45,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 06:35:45,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:45,628 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc7cd86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45, skipping insertion in model container [2022-07-23 06:35:45,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:45,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 06:35:45,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 06:35:45,891 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_remove_all_reverse.i[24151,24164] [2022-07-23 06:35:45,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:35:45,908 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 06:35:45,954 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_remove_all_reverse.i[24151,24164] [2022-07-23 06:35:45,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 06:35:45,990 INFO L208 MainTranslator]: Completed translation [2022-07-23 06:35:45,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45 WrapperNode [2022-07-23 06:35:45,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 06:35:45,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 06:35:45,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 06:35:45,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 06:35:45,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:46,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:46,047 INFO L137 Inliner]: procedures = 129, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 126 [2022-07-23 06:35:46,048 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 06:35:46,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 06:35:46,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 06:35:46,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 06:35:46,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:46,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:46,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:46,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:46,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:46,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:46,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:46,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 06:35:46,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 06:35:46,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 06:35:46,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 06:35:46,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (1/1) ... [2022-07-23 06:35:46,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 06:35:46,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 06:35:46,107 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) [2022-07-23 06:35:46,117 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 [2022-07-23 06:35:46,144 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-23 06:35:46,144 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-23 06:35:46,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 06:35:46,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 06:35:46,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 06:35:46,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 06:35:46,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 06:35:46,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 06:35:46,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-23 06:35:46,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 06:35:46,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-23 06:35:46,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 06:35:46,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 06:35:46,292 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 06:35:46,296 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 06:35:46,686 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 06:35:46,695 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 06:35:46,695 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 06:35:46,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:35:46 BoogieIcfgContainer [2022-07-23 06:35:46,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 06:35:46,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 06:35:46,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 06:35:46,701 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 06:35:46,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 06:35:45" (1/3) ... [2022-07-23 06:35:46,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc7e005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:35:46, skipping insertion in model container [2022-07-23 06:35:46,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 06:35:45" (2/3) ... [2022-07-23 06:35:46,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dc7e005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 06:35:46, skipping insertion in model container [2022-07-23 06:35:46,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 06:35:46" (3/3) ... [2022-07-23 06:35:46,704 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2022-07-23 06:35:46,715 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 06:35:46,715 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-07-23 06:35:46,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 06:35:46,754 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@3d5e34aa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@62be61e4 [2022-07-23 06:35:46,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-07-23 06:35:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 93 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 06:35:46,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:46,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 06:35:46,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:46,766 INFO L85 PathProgramCache]: Analyzing trace with hash 894197909, now seen corresponding path program 1 times [2022-07-23 06:35:46,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:35:46,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1357609053] [2022-07-23 06:35:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:46,775 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:35:46,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:35:46,778 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) [2022-07-23 06:35:46,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-23 06:35:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:46,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:35:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:46,907 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 [2022-07-23 06:35:46,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:35:46,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:35:46,918 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:35:46,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1357609053] [2022-07-23 06:35:46,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1357609053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:46,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:35:46,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:35:46,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377718365] [2022-07-23 06:35:46,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:46,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:35:46,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:35:46,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:35:46,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:35:46,945 INFO L87 Difference]: Start difference. First operand has 97 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 93 states have internal predecessors, (104), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) 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) [2022-07-23 06:35:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:47,055 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2022-07-23 06:35:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:35:47,057 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 [2022-07-23 06:35:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:47,062 INFO L225 Difference]: With dead ends: 95 [2022-07-23 06:35:47,062 INFO L226 Difference]: Without dead ends: 92 [2022-07-23 06:35:47,063 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 [2022-07-23 06:35:47,065 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:47,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:35:47,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-23 06:35:47,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-07-23 06:35:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 88 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:47,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2022-07-23 06:35:47,090 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 6 [2022-07-23 06:35:47,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:47,091 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2022-07-23 06:35:47,091 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) [2022-07-23 06:35:47,091 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2022-07-23 06:35:47,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 06:35:47,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:47,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 06:35:47,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-23 06:35:47,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:35:47,300 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:47,301 INFO L85 PathProgramCache]: Analyzing trace with hash 894197910, now seen corresponding path program 1 times [2022-07-23 06:35:47,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:35:47,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628875634] [2022-07-23 06:35:47,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:47,302 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:35:47,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:35:47,304 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) [2022-07-23 06:35:47,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-23 06:35:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:47,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:35:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:47,358 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 [2022-07-23 06:35:47,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:35:47,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:35:47,368 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:35:47,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628875634] [2022-07-23 06:35:47,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628875634] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:47,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:35:47,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 06:35:47,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493783258] [2022-07-23 06:35:47,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:47,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:35:47,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:35:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:35:47,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:35:47,371 INFO L87 Difference]: Start difference. First operand 92 states and 97 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) [2022-07-23 06:35:47,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:47,472 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-07-23 06:35:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:35:47,473 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 [2022-07-23 06:35:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:47,474 INFO L225 Difference]: With dead ends: 90 [2022-07-23 06:35:47,474 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 06:35:47,474 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 [2022-07-23 06:35:47,475 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 4 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:47,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 146 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:35:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 06:35:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-07-23 06:35:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-07-23 06:35:47,480 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 6 [2022-07-23 06:35:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:47,480 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-07-23 06:35:47,480 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) [2022-07-23 06:35:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-07-23 06:35:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 06:35:47,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:47,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:47,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-23 06:35:47,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:35:47,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1984336343, now seen corresponding path program 1 times [2022-07-23 06:35:47,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:35:47,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010105891] [2022-07-23 06:35:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:47,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:35:47,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:35:47,694 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) [2022-07-23 06:35:47,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-23 06:35:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:47,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 06:35:47,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:35:47,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:35:47,774 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:35:47,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010105891] [2022-07-23 06:35:47,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010105891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:47,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:35:47,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 06:35:47,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728882792] [2022-07-23 06:35:47,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:47,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 06:35:47,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:35:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 06:35:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 06:35:47,776 INFO L87 Difference]: Start difference. First operand 90 states and 95 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) [2022-07-23 06:35:47,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:47,786 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2022-07-23 06:35:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 06:35:47,787 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 [2022-07-23 06:35:47,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:47,788 INFO L225 Difference]: With dead ends: 97 [2022-07-23 06:35:47,788 INFO L226 Difference]: Without dead ends: 97 [2022-07-23 06:35:47,788 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 [2022-07-23 06:35:47,789 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 183 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 [2022-07-23 06:35:47,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 183 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:35:47,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-23 06:35:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2022-07-23 06:35:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.84) internal successors, (92), 87 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-07-23 06:35:47,797 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 13 [2022-07-23 06:35:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:47,797 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-07-23 06:35:47,797 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) [2022-07-23 06:35:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-07-23 06:35:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 06:35:47,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:47,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:47,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-23 06:35:48,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:35:48,010 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:48,011 INFO L85 PathProgramCache]: Analyzing trace with hash 305697820, now seen corresponding path program 1 times [2022-07-23 06:35:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:35:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [952437301] [2022-07-23 06:35:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:48,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:35:48,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:35:48,018 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) [2022-07-23 06:35:48,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-23 06:35:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 06:35:48,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:48,107 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 [2022-07-23 06:35:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:35:48,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:35:48,133 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:35:48,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [952437301] [2022-07-23 06:35:48,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [952437301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:48,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:35:48,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:35:48,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600825587] [2022-07-23 06:35:48,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:48,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:35:48,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:35:48,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:35:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:35:48,135 INFO L87 Difference]: Start difference. First operand 91 states and 96 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) [2022-07-23 06:35:48,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:48,387 INFO L93 Difference]: Finished difference Result 144 states and 154 transitions. [2022-07-23 06:35:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:35:48,388 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 [2022-07-23 06:35:48,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:48,390 INFO L225 Difference]: With dead ends: 144 [2022-07-23 06:35:48,390 INFO L226 Difference]: Without dead ends: 144 [2022-07-23 06:35:48,390 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 [2022-07-23 06:35:48,391 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 66 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:48,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 247 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:35:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-23 06:35:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2022-07-23 06:35:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 50 states have (on average 1.82) internal successors, (91), 86 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2022-07-23 06:35:48,396 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 22 [2022-07-23 06:35:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:48,396 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2022-07-23 06:35:48,397 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) [2022-07-23 06:35:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2022-07-23 06:35:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 06:35:48,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:48,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:48,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-23 06:35:48,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:35:48,607 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:48,607 INFO L85 PathProgramCache]: Analyzing trace with hash 305697821, now seen corresponding path program 1 times [2022-07-23 06:35:48,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:35:48,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232562627] [2022-07-23 06:35:48,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:48,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:35:48,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:35:48,609 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) [2022-07-23 06:35:48,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-23 06:35:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:48,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 06:35:48,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:48,703 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 [2022-07-23 06:35:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:35:48,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:35:48,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:35:48,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232562627] [2022-07-23 06:35:48,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232562627] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:35:48,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:35:48,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 06:35:48,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101376449] [2022-07-23 06:35:48,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:35:48,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:35:48,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:35:48,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:35:48,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:35:48,764 INFO L87 Difference]: Start difference. First operand 90 states and 95 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) [2022-07-23 06:35:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:48,984 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-07-23 06:35:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:35:48,984 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 [2022-07-23 06:35:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:48,985 INFO L225 Difference]: With dead ends: 90 [2022-07-23 06:35:48,985 INFO L226 Difference]: Without dead ends: 90 [2022-07-23 06:35:48,985 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 [2022-07-23 06:35:48,986 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 81 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:48,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 226 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 06:35:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-23 06:35:49,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-07-23 06:35:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 50 states have (on average 1.8) internal successors, (90), 85 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-23 06:35:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2022-07-23 06:35:49,005 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 22 [2022-07-23 06:35:49,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:49,007 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2022-07-23 06:35:49,007 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) [2022-07-23 06:35:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2022-07-23 06:35:49,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 06:35:49,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:49,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:49,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-23 06:35:49,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:35:49,209 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:49,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1713076933, now seen corresponding path program 1 times [2022-07-23 06:35:49,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:35:49,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429568468] [2022-07-23 06:35:49,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:49,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:35:49,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:35:49,213 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) [2022-07-23 06:35:49,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-23 06:35:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:49,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 06:35:49,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:49,306 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 [2022-07-23 06:35:49,403 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:35:49,403 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 17 treesize of output 24 [2022-07-23 06:35:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:35:49,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:35:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:35:49,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:35:49,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429568468] [2022-07-23 06:35:49,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429568468] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:35:49,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:35:49,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-23 06:35:49,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731150699] [2022-07-23 06:35:49,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:35:49,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:35:49,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:35:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:35:49,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-23 06:35:49,553 INFO L87 Difference]: Start difference. First operand 89 states and 94 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) [2022-07-23 06:35:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:35:49,784 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2022-07-23 06:35:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 06:35:49,785 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 [2022-07-23 06:35:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:35:49,785 INFO L225 Difference]: With dead ends: 148 [2022-07-23 06:35:49,785 INFO L226 Difference]: Without dead ends: 148 [2022-07-23 06:35:49,786 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 [2022-07-23 06:35:49,786 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 60 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:35:49,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 328 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 207 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-07-23 06:35:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-23 06:35:49,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 95. [2022-07-23 06:35:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 90 states have internal predecessors, (95), 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) [2022-07-23 06:35:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-07-23 06:35:49,790 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 25 [2022-07-23 06:35:49,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:35:49,791 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-07-23 06:35:49,791 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) [2022-07-23 06:35:49,791 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-07-23 06:35:49,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-23 06:35:49,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:35:49,792 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:35:49,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-23 06:35:49,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:35:50,000 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:35:50,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:35:50,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1713076934, now seen corresponding path program 1 times [2022-07-23 06:35:50,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:35:50,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [124114834] [2022-07-23 06:35:50,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:50,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:35:50,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:35:50,002 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) [2022-07-23 06:35:50,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-23 06:35:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:50,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:35:50,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:50,111 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 [2022-07-23 06:35:50,118 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 [2022-07-23 06:35:52,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:35:52,274 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 [2022-07-23 06:35:52,292 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:35:52,292 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 [2022-07-23 06:35:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:35:52,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:35:56,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:35:56,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [124114834] [2022-07-23 06:35:56,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [124114834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:35:56,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [440713632] [2022-07-23 06:35:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:35:56,572 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:35:56,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:35:56,578 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) [2022-07-23 06:35:56,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-07-23 06:35:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:35:56,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:35:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:35:56,728 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 [2022-07-23 06:35:56,733 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 [2022-07-23 06:35:58,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:35:58,839 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 [2022-07-23 06:35:58,846 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:35:58,846 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 [2022-07-23 06:35:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:35:58,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:36:01,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [440713632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:36:01,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:36:01,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-23 06:36:01,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472176552] [2022-07-23 06:36:01,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:36:01,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 06:36:01,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:36:01,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 06:36:01,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=85, Unknown=2, NotChecked=0, Total=110 [2022-07-23 06:36:01,027 INFO L87 Difference]: Start difference. First operand 95 states and 99 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) [2022-07-23 06:36:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:36:01,611 INFO L93 Difference]: Finished difference Result 224 states and 238 transitions. [2022-07-23 06:36:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 06:36:01,612 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 [2022-07-23 06:36:01,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:36:01,613 INFO L225 Difference]: With dead ends: 224 [2022-07-23 06:36:01,613 INFO L226 Difference]: Without dead ends: 224 [2022-07-23 06:36:01,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=31, Invalid=123, Unknown=2, NotChecked=0, Total=156 [2022-07-23 06:36:01,614 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 128 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:36:01,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 308 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 340 Invalid, 0 Unknown, 116 Unchecked, 0.5s Time] [2022-07-23 06:36:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-07-23 06:36:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 101. [2022-07-23 06:36:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 61 states have (on average 1.6557377049180328) internal successors, (101), 95 states have internal predecessors, (101), 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) [2022-07-23 06:36:01,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2022-07-23 06:36:01,624 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 25 [2022-07-23 06:36:01,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:36:01,625 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2022-07-23 06:36:01,625 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) [2022-07-23 06:36:01,625 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2022-07-23 06:36:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:36:01,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:36:01,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:36:01,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-07-23 06:36:01,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-23 06:36:02,036 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 [2022-07-23 06:36:02,037 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:36:02,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:36:02,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1566263260, now seen corresponding path program 1 times [2022-07-23 06:36:02,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:36:02,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985895729] [2022-07-23 06:36:02,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:36:02,037 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:36:02,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:36:02,039 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) [2022-07-23 06:36:02,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-23 06:36:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:36:02,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 06:36:02,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:36:02,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:36:02,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:36:02,153 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:36:02,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985895729] [2022-07-23 06:36:02,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985895729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:36:02,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:36:02,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:36:02,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635939502] [2022-07-23 06:36:02,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:36:02,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 06:36:02,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:36:02,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 06:36:02,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:36:02,155 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:36:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:36:02,175 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2022-07-23 06:36:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:36:02,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-07-23 06:36:02,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:36:02,178 INFO L225 Difference]: With dead ends: 160 [2022-07-23 06:36:02,178 INFO L226 Difference]: Without dead ends: 160 [2022-07-23 06:36:02,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 06:36:02,179 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 133 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:36:02,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 183 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:36:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-23 06:36:02,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 102. [2022-07-23 06:36:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 62 states have (on average 1.6451612903225807) 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) [2022-07-23 06:36:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2022-07-23 06:36:02,193 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 29 [2022-07-23 06:36:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:36:02,193 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2022-07-23 06:36:02,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:36:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2022-07-23 06:36:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:36:02,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:36:02,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:36:02,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-23 06:36:02,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:36:02,417 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:36:02,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:36:02,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1566263288, now seen corresponding path program 1 times [2022-07-23 06:36:02,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:36:02,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1680769406] [2022-07-23 06:36:02,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:36:02,418 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:36:02,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:36:02,419 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:36:02,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-23 06:36:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:36:02,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 06:36:02,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:36:02,541 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 [2022-07-23 06:36:02,612 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 06:36:02,613 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 21 [2022-07-23 06:36:02,702 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-23 06:36:02,702 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 27 [2022-07-23 06:36:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:36:02,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:36:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:36:03,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:36:03,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1680769406] [2022-07-23 06:36:03,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1680769406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:36:03,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:36:03,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-07-23 06:36:03,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10774336] [2022-07-23 06:36:03,191 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:36:03,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 06:36:03,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:36:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 06:36:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-23 06:36:03,192 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:36:03,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:36:03,520 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2022-07-23 06:36:03,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 06:36:03,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-23 06:36:03,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:36:03,521 INFO L225 Difference]: With dead ends: 139 [2022-07-23 06:36:03,521 INFO L226 Difference]: Without dead ends: 139 [2022-07-23 06:36:03,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:36:03,521 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 235 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:36:03,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 395 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 163 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-07-23 06:36:03,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-23 06:36:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2022-07-23 06:36:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.5873015873015872) internal successors, (100), 93 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) [2022-07-23 06:36:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2022-07-23 06:36:03,524 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 29 [2022-07-23 06:36:03,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:36:03,524 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2022-07-23 06:36:03,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 06:36:03,525 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2022-07-23 06:36:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 06:36:03,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:36:03,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:36:03,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-23 06:36:03,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:36:03,739 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:36:03,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:36:03,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1566263287, now seen corresponding path program 1 times [2022-07-23 06:36:03,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:36:03,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516320086] [2022-07-23 06:36:03,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:36:03,740 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:36:03,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:36:03,742 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) [2022-07-23 06:36:03,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-23 06:36:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:36:03,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 06:36:03,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:36:03,884 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 [2022-07-23 06:36:03,888 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 [2022-07-23 06:36:03,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:36:03,963 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 [2022-07-23 06:36:03,970 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:36:03,970 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 [2022-07-23 06:36:04,042 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 06:36:04,043 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 [2022-07-23 06:36:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:36:04,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:36:04,480 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:36:04,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516320086] [2022-07-23 06:36:04,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516320086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:36:04,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412618552] [2022-07-23 06:36:04,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:36:04,481 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:36:04,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:36:04,482 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) [2022-07-23 06:36:04,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-07-23 06:36:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:36:04,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 06:36:04,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:36:04,671 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 [2022-07-23 06:36:04,705 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 [2022-07-23 06:36:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:36:04,821 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 [2022-07-23 06:36:04,890 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 [2022-07-23 06:36:05,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:36:05,019 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 [2022-07-23 06:36:05,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 06:36:05,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:36:07,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412618552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:36:07,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:36:07,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2022-07-23 06:36:07,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996885664] [2022-07-23 06:36:07,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:36:07,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 06:36:07,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:36:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 06:36:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-07-23 06:36:07,024 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 17 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:36:09,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:36:09,408 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2022-07-23 06:36:09,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:36:09,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-07-23 06:36:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:36:09,409 INFO L225 Difference]: With dead ends: 128 [2022-07-23 06:36:09,409 INFO L226 Difference]: Without dead ends: 128 [2022-07-23 06:36:09,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=105, Invalid=596, Unknown=1, NotChecked=0, Total=702 [2022-07-23 06:36:09,410 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 11 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 06:36:09,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 510 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 229 Unchecked, 0.2s Time] [2022-07-23 06:36:09,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-23 06:36:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-07-23 06:36:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 114 states have internal predecessors, (123), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:36:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2022-07-23 06:36:09,419 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 29 [2022-07-23 06:36:09,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:36:09,421 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2022-07-23 06:36:09,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:36:09,421 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2022-07-23 06:36:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 06:36:09,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:36:09,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:36:09,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-07-23 06:36:09,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-23 06:36:09,839 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 [2022-07-23 06:36:09,840 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:36:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:36:09,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1940465843, now seen corresponding path program 1 times [2022-07-23 06:36:09,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:36:09,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635584861] [2022-07-23 06:36:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:36:09,841 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:36:09,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:36:09,842 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) [2022-07-23 06:36:09,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-23 06:36:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:36:09,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-23 06:36:09,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:36:09,961 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 [2022-07-23 06:36:10,053 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 17 treesize of output 9 [2022-07-23 06:36:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:36:10,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:36:10,079 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:36:10,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635584861] [2022-07-23 06:36:10,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635584861] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:36:10,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:36:10,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 06:36:10,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598666955] [2022-07-23 06:36:10,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:36:10,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 06:36:10,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:36:10,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 06:36:10,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:36:10,081 INFO L87 Difference]: Start difference. First operand 123 states and 131 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2022-07-23 06:36:10,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:36:10,765 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2022-07-23 06:36:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:36:10,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 31 [2022-07-23 06:36:10,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:36:10,766 INFO L225 Difference]: With dead ends: 161 [2022-07-23 06:36:10,766 INFO L226 Difference]: Without dead ends: 161 [2022-07-23 06:36:10,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-23 06:36:10,767 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 291 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 06:36:10,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 373 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 06:36:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-23 06:36:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2022-07-23 06:36:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 86 states have (on average 1.441860465116279) internal successors, (124), 114 states have internal predecessors, (124), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:36:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 132 transitions. [2022-07-23 06:36:10,770 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 132 transitions. Word has length 31 [2022-07-23 06:36:10,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:36:10,770 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 132 transitions. [2022-07-23 06:36:10,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2022-07-23 06:36:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 132 transitions. [2022-07-23 06:36:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 06:36:10,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:36:10,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:36:10,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-07-23 06:36:10,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:36:10,971 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:36:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:36:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1940465842, now seen corresponding path program 1 times [2022-07-23 06:36:10,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:36:10,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310786160] [2022-07-23 06:36:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:36:10,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:36:10,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:36:10,974 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) [2022-07-23 06:36:10,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-23 06:36:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:36:11,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-23 06:36:11,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:36:11,097 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 [2022-07-23 06:36:11,237 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 17 treesize of output 9 [2022-07-23 06:36:11,241 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 [2022-07-23 06:36:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:36:11,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:36:11,287 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:36:11,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310786160] [2022-07-23 06:36:11,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310786160] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:36:11,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:36:11,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 06:36:11,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6808146] [2022-07-23 06:36:11,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:36:11,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 06:36:11,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:36:11,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 06:36:11,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-07-23 06:36:11,288 INFO L87 Difference]: Start difference. First operand 123 states and 132 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2022-07-23 06:36:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:36:12,317 INFO L93 Difference]: Finished difference Result 221 states and 234 transitions. [2022-07-23 06:36:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:36:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 31 [2022-07-23 06:36:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:36:12,319 INFO L225 Difference]: With dead ends: 221 [2022-07-23 06:36:12,319 INFO L226 Difference]: Without dead ends: 221 [2022-07-23 06:36:12,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-07-23 06:36:12,319 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 745 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:36:12,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 303 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-23 06:36:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-23 06:36:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 135. [2022-07-23 06:36:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 98 states have (on average 1.4795918367346939) internal successors, (145), 126 states have internal predecessors, (145), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:36:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2022-07-23 06:36:12,328 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 31 [2022-07-23 06:36:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:36:12,328 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2022-07-23 06:36:12,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2022-07-23 06:36:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2022-07-23 06:36:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 06:36:12,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:36:12,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:36:12,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-23 06:36:12,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:36:12,537 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:36:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:36:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash -24898970, now seen corresponding path program 1 times [2022-07-23 06:36:12,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:36:12,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057399240] [2022-07-23 06:36:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:36:12,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:36:12,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:36:12,540 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) [2022-07-23 06:36:12,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-23 06:36:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:36:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:36:12,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:36:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 06:36:12,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:36:12,688 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:36:12,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057399240] [2022-07-23 06:36:12,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057399240] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:36:12,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:36:12,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 06:36:12,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341879082] [2022-07-23 06:36:12,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:36:12,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 06:36:12,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:36:12,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 06:36:12,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 06:36:12,689 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:36:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:36:12,761 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-07-23 06:36:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 06:36:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2022-07-23 06:36:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:36:12,762 INFO L225 Difference]: With dead ends: 129 [2022-07-23 06:36:12,762 INFO L226 Difference]: Without dead ends: 129 [2022-07-23 06:36:12,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-23 06:36:12,763 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 166 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 06:36:12,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 87 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 06:36:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-23 06:36:12,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-23 06:36:12,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 98 states have (on average 1.3877551020408163) internal successors, (136), 120 states have internal predecessors, (136), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:36:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 144 transitions. [2022-07-23 06:36:12,765 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 144 transitions. Word has length 32 [2022-07-23 06:36:12,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:36:12,765 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 144 transitions. [2022-07-23 06:36:12,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-23 06:36:12,766 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 144 transitions. [2022-07-23 06:36:12,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 06:36:12,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:36:12,766 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:36:12,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-07-23 06:36:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:36:12,976 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:36:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:36:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash 533076568, now seen corresponding path program 1 times [2022-07-23 06:36:12,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:36:12,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831558481] [2022-07-23 06:36:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:36:12,977 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:36:12,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:36:12,979 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) [2022-07-23 06:36:12,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-23 06:36:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:36:13,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-23 06:36:13,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:36:13,153 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 [2022-07-23 06:36:13,246 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:36:13,246 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 [2022-07-23 06:36:13,286 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 [2022-07-23 06:36:13,341 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:36:13,341 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 28 treesize of output 29 [2022-07-23 06:36:13,451 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 45 treesize of output 33 [2022-07-23 06:36:13,575 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-23 06:36:13,576 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 41 treesize of output 25 [2022-07-23 06:36:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:36:13,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:36:13,799 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 18 [2022-07-23 06:36:13,920 INFO L356 Elim1Store]: treesize reduction 5, result has 77.3 percent of original size [2022-07-23 06:36:13,921 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 26 treesize of output 25 [2022-07-23 06:36:13,930 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_574))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse0)) (= (select (select .cse1 .cse0) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|))))) is different from false [2022-07-23 06:36:13,944 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_574 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_574))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse1 .cse0) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)))))) is different from false [2022-07-23 06:36:13,951 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:36:13,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2022-07-23 06:36:14,027 INFO L356 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-07-23 06:36:14,028 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 6 case distinctions, treesize of input 104 treesize of output 120 [2022-07-23 06:36:14,043 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:36:14,044 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 93 treesize of output 87 [2022-07-23 06:36:14,322 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:36:14,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831558481] [2022-07-23 06:36:14,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831558481] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:36:14,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1666133537] [2022-07-23 06:36:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:36:14,323 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:36:14,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:36:14,324 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-23 06:36:14,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-07-23 06:36:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:36:14,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-23 06:36:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:36:14,563 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 [2022-07-23 06:36:14,785 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-23 06:36:14,786 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 17 treesize of output 24 [2022-07-23 06:36:14,929 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 [2022-07-23 06:36:15,072 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:36:15,072 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 [2022-07-23 06:36:15,331 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 55 treesize of output 39 [2022-07-23 06:36:15,515 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:36:15,516 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 [2022-07-23 06:36:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:36:15,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:36:15,678 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 18 [2022-07-23 06:36:15,885 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_621 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_621))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (select |c_#valid| (select (select .cse0 .cse1) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (_ bv1 1)) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse1)))))) is different from false [2022-07-23 06:36:15,902 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_621 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_621))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= (select |c_#valid| (select (select .cse0 .cse1) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (_ bv1 1)) (not (= .cse1 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)))))) is different from false [2022-07-23 06:36:15,910 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:36:15,910 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 55 treesize of output 39 [2022-07-23 06:36:15,992 INFO L356 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-07-23 06:36:15,992 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 6 case distinctions, treesize of input 112 treesize of output 128 [2022-07-23 06:36:16,010 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:36:16,010 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 101 treesize of output 95 [2022-07-23 06:36:27,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1666133537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:36:27,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:36:27,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 37 [2022-07-23 06:36:27,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708239385] [2022-07-23 06:36:27,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:36:27,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-23 06:36:27,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:36:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-23 06:36:27,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2287, Unknown=7, NotChecked=396, Total=2862 [2022-07-23 06:36:27,357 INFO L87 Difference]: Start difference. First operand 129 states and 144 transitions. Second operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 33 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:36:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:36:28,864 INFO L93 Difference]: Finished difference Result 142 states and 158 transitions. [2022-07-23 06:36:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 06:36:28,865 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 33 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-07-23 06:36:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:36:28,865 INFO L225 Difference]: With dead ends: 142 [2022-07-23 06:36:28,865 INFO L226 Difference]: Without dead ends: 142 [2022-07-23 06:36:28,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=301, Invalid=2900, Unknown=7, NotChecked=452, Total=3660 [2022-07-23 06:36:28,866 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 61 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 06:36:28,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 1096 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 801 Invalid, 0 Unknown, 201 Unchecked, 0.9s Time] [2022-07-23 06:36:28,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-23 06:36:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2022-07-23 06:36:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 109 states have (on average 1.3669724770642202) internal successors, (149), 131 states have internal predecessors, (149), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:36:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 157 transitions. [2022-07-23 06:36:28,869 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 157 transitions. Word has length 36 [2022-07-23 06:36:28,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:36:28,869 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 157 transitions. [2022-07-23 06:36:28,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 33 states have internal predecessors, (57), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:36:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 157 transitions. [2022-07-23 06:36:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 06:36:28,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:36:28,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:36:28,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-23 06:36:29,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-07-23 06:36:29,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-23 06:36:29,271 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:36:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:36:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash 533076569, now seen corresponding path program 1 times [2022-07-23 06:36:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:36:29,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561723114] [2022-07-23 06:36:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:36:29,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:36:29,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:36:29,273 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) [2022-07-23 06:36:29,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-23 06:36:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:36:29,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-23 06:36:29,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:36:29,422 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 [2022-07-23 06:36:29,426 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 [2022-07-23 06:36:29,582 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:36:29,583 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 [2022-07-23 06:36:29,589 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 [2022-07-23 06:36:29,646 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 [2022-07-23 06:36:29,655 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-23 06:36:29,744 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:36:29,744 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 [2022-07-23 06:36:29,748 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 [2022-07-23 06:36:30,158 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-07-23 06:36:30,158 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 83 treesize of output 51 [2022-07-23 06:36:30,166 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-23 06:36:30,167 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 36 treesize of output 19 [2022-07-23 06:36:30,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:36:30,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:36:32,523 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_672 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_672)) (.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_673))) (let ((.cse1 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse0 (select (select .cse2 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse1)) (bvule (bvadd (_ bv4 32) (select (select .cse2 .cse1) .cse0)) (select |c_#length| (select (select .cse3 .cse1) .cse0))))))) (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_672 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse6 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_672))) (let ((.cse4 (select (select .cse6 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse7 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_673) |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse4 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (let ((.cse5 (select (select .cse6 .cse7) .cse4))) (bvule .cse5 (bvadd (_ bv4 32) .cse5))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse7))))))) is different from false [2022-07-23 06:36:32,599 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_672 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_672))) (let ((.cse3 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_673) |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (let ((.cse0 (select (select .cse1 .cse2) .cse3))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))) (not (= .cse3 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (not (= .cse2 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)))))) (forall ((v_ArrVal_673 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~#s~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_672 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_673)) (.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_672))) (let ((.cse4 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (select (select .cse7 |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse4 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (bvule (bvadd (_ bv4 32) (select (select .cse5 .cse6) .cse4)) (select |c_#length| (select (select .cse7 .cse6) .cse4))) (not (= .cse6 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|))))))) is different from false [2022-07-23 06:36:32,626 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:36:32,626 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 117 treesize of output 93 [2022-07-23 06:36:32,636 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:36:32,636 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 93 treesize of output 69 [2022-07-23 06:36:32,749 INFO L356 Elim1Store]: treesize reduction 28, result has 67.1 percent of original size [2022-07-23 06:36:32,750 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 6 case distinctions, treesize of input 249 treesize of output 250 [2022-07-23 06:36:33,380 INFO L356 Elim1Store]: treesize reduction 140, result has 43.8 percent of original size [2022-07-23 06:36:33,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 546 treesize of output 540 [2022-07-23 06:36:33,473 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:36:33,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 458 treesize of output 442 [2022-07-23 06:36:33,557 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:36:33,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 426 treesize of output 400 [2022-07-23 06:37:38,753 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:37:38,754 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 115 treesize of output 99 [2022-07-23 06:37:38,765 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:37:38,765 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 99 treesize of output 67 [2022-07-23 06:37:38,909 INFO L356 Elim1Store]: treesize reduction 61, result has 45.0 percent of original size [2022-07-23 06:37:38,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 218 treesize of output 189 [2022-07-23 06:37:38,997 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:37:38,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 222 treesize of output 222 [2022-07-23 06:37:39,006 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 170 treesize of output 158 [2022-07-23 06:37:39,056 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:37:39,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 181 [2022-07-23 06:37:47,552 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:37:47,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561723114] [2022-07-23 06:37:47,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561723114] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:37:47,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933584582] [2022-07-23 06:37:47,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:37:47,557 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-23 06:37:47,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-23 06:37:47,559 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) [2022-07-23 06:37:47,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-07-23 06:37:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:37:47,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-23 06:37:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:37:47,890 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 [2022-07-23 06:37:47,894 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 [2022-07-23 06:37:48,299 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:37:48,299 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 [2022-07-23 06:37:48,309 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 [2022-07-23 06:37:48,492 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 [2022-07-23 06:37:48,496 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 [2022-07-23 06:37:48,718 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:37:48,718 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 [2022-07-23 06:37:48,722 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 [2022-07-23 06:37:49,401 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:37:49,401 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 83 treesize of output 42 [2022-07-23 06:37:49,404 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 30 treesize of output 13 [2022-07-23 06:37:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:37:49,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:37:51,057 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_726 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_727 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_726)) (.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_727))) (let ((.cse1 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse0 (select (select .cse2 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (not (= .cse1 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)) (bvule (bvadd (_ bv4 32) (select (select .cse2 .cse1) .cse0)) (select |c_#length| (select (select .cse3 .cse1) .cse0))))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_726 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_727 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_726))) (let ((.cse7 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_727) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (let ((.cse4 (select (select .cse5 .cse6) .cse7))) (bvule .cse4 (bvadd (_ bv4 32) .cse4))) (not (= .cse7 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (not (= .cse6 |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|))))))) is different from false [2022-07-23 06:37:51,147 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_726 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_727 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_726)) (.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_727))) (let ((.cse0 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse2 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) (bvule (bvadd (_ bv4 32) (select (select .cse1 .cse0) .cse2)) (select |c_#length| (select (select .cse3 .cse0) .cse2))) (not (= .cse2 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| (_ BitVec 32)) (v_ArrVal_726 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_727 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_726))) (let ((.cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_727) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse7 (select (select .cse5 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (let ((.cse4 (select (select .cse5 .cse6) .cse7))) (bvule .cse4 (bvadd (_ bv4 32) .cse4))) (not (= .cse6 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) (not (= .cse7 |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|))))))) is different from false [2022-07-23 06:37:51,171 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:37:51,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 93 [2022-07-23 06:37:51,181 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:37:51,182 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 93 treesize of output 69 [2022-07-23 06:37:51,331 INFO L356 Elim1Store]: treesize reduction 21, result has 73.1 percent of original size [2022-07-23 06:37:51,331 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 6 case distinctions, treesize of input 242 treesize of output 250 [2022-07-23 06:37:51,779 INFO L356 Elim1Store]: treesize reduction 67, result has 64.0 percent of original size [2022-07-23 06:37:51,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 546 treesize of output 556 [2022-07-23 06:37:51,848 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:37:51,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 493 treesize of output 473 [2022-07-23 06:37:51,930 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:37:51,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 439 treesize of output 411 [2022-07-23 06:38:03,536 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:38:03,536 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 115 treesize of output 99 [2022-07-23 06:38:03,569 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:38:03,570 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 99 treesize of output 67 [2022-07-23 06:38:03,611 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:38:03,611 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 120 treesize of output 115 [2022-07-23 06:38:04,184 INFO L356 Elim1Store]: treesize reduction 67, result has 64.0 percent of original size [2022-07-23 06:38:04,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 254 treesize of output 288 [2022-07-23 06:38:04,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 138 [2022-07-23 06:38:04,314 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:38:04,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 213 treesize of output 205 [2022-07-23 06:38:15,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1933584582] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 06:38:15,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:38:15,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 35 [2022-07-23 06:38:15,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827192828] [2022-07-23 06:38:15,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:38:15,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-23 06:38:15,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:38:15,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-23 06:38:15,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2205, Unknown=4, NotChecked=388, Total=2756 [2022-07-23 06:38:15,969 INFO L87 Difference]: Start difference. First operand 140 states and 157 transitions. Second operand has 36 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 31 states have internal predecessors, (55), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:38:18,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:38:18,636 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2022-07-23 06:38:18,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 06:38:18,636 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 31 states have internal predecessors, (55), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-07-23 06:38:18,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:38:18,637 INFO L225 Difference]: With dead ends: 187 [2022-07-23 06:38:18,637 INFO L226 Difference]: Without dead ends: 187 [2022-07-23 06:38:18,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=276, Invalid=2928, Unknown=4, NotChecked=452, Total=3660 [2022-07-23 06:38:18,638 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 73 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1554 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 373 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-23 06:38:18,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1554 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1240 Invalid, 0 Unknown, 373 Unchecked, 1.7s Time] [2022-07-23 06:38:18,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-23 06:38:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2022-07-23 06:38:18,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 130 states have internal predecessors, (147), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:38:18,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 155 transitions. [2022-07-23 06:38:18,642 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 155 transitions. Word has length 36 [2022-07-23 06:38:18,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:38:18,643 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 155 transitions. [2022-07-23 06:38:18,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 31 states have internal predecessors, (55), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 06:38:18,643 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 155 transitions. [2022-07-23 06:38:18,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 06:38:18,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:38:18,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:38:18,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-07-23 06:38:18,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-23 06:38:19,047 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 [2022-07-23 06:38:19,047 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:38:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:38:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1281069388, now seen corresponding path program 2 times [2022-07-23 06:38:19,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:38:19,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588275744] [2022-07-23 06:38:19,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:38:19,048 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:38:19,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:38:19,049 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) [2022-07-23 06:38:19,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-23 06:38:19,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:38:19,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:38:19,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 06:38:19,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:38:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 06:38:19,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:38:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-23 06:38:19,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:38:19,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588275744] [2022-07-23 06:38:19,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588275744] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:38:19,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:38:19,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-23 06:38:19,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521103952] [2022-07-23 06:38:19,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:38:19,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 06:38:19,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:38:19,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 06:38:19,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-23 06:38:19,246 INFO L87 Difference]: Start difference. First operand 139 states and 155 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) [2022-07-23 06:38:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:38:19,261 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2022-07-23 06:38:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 06:38:19,261 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 [2022-07-23 06:38:19,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:38:19,262 INFO L225 Difference]: With dead ends: 103 [2022-07-23 06:38:19,262 INFO L226 Difference]: Without dead ends: 103 [2022-07-23 06:38:19,262 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 [2022-07-23 06:38:19,262 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 62 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:38:19,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 170 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 06:38:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-23 06:38:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-07-23 06:38:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 77 states have (on average 1.4285714285714286) internal successors, (110), 98 states have internal predecessors, (110), 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) [2022-07-23 06:38:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2022-07-23 06:38:19,264 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 37 [2022-07-23 06:38:19,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:38:19,264 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2022-07-23 06:38:19,265 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) [2022-07-23 06:38:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2022-07-23 06:38:19,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-23 06:38:19,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:38:19,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:38:19,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-23 06:38:19,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:38:19,482 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:38:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:38:19,483 INFO L85 PathProgramCache]: Analyzing trace with hash -656124647, now seen corresponding path program 1 times [2022-07-23 06:38:19,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:38:19,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777247972] [2022-07-23 06:38:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:38:19,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:38:19,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:38:19,484 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:38:19,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-23 06:38:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:38:19,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 06:38:19,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:38:19,698 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 [2022-07-23 06:38:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:38:19,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:38:19,709 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:38:19,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777247972] [2022-07-23 06:38:19,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777247972] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:38:19,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:38:19,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 06:38:19,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077273020] [2022-07-23 06:38:19,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:38:19,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 06:38:19,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:38:19,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 06:38:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:38:19,710 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2022-07-23 06:38:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:38:20,208 INFO L93 Difference]: Finished difference Result 165 states and 180 transitions. [2022-07-23 06:38:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:38:20,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 37 [2022-07-23 06:38:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:38:20,209 INFO L225 Difference]: With dead ends: 165 [2022-07-23 06:38:20,209 INFO L226 Difference]: Without dead ends: 165 [2022-07-23 06:38:20,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-07-23 06:38:20,209 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 456 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 06:38:20,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 357 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 06:38:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-23 06:38:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 120. [2022-07-23 06:38:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.4680851063829787) internal successors, (138), 115 states have internal predecessors, (138), 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) [2022-07-23 06:38:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2022-07-23 06:38:20,212 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 37 [2022-07-23 06:38:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:38:20,212 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2022-07-23 06:38:20,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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) [2022-07-23 06:38:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2022-07-23 06:38:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-23 06:38:20,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:38:20,212 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:38:20,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-23 06:38:20,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:38:20,413 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:38:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:38:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1135403477, now seen corresponding path program 1 times [2022-07-23 06:38:20,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:38:20,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518859930] [2022-07-23 06:38:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:38:20,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:38:20,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:38:20,415 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) [2022-07-23 06:38:20,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-23 06:38:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:38:20,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 06:38:20,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:38:20,690 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 10 [2022-07-23 06:38:20,693 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 [2022-07-23 06:38:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:38:20,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:38:20,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:38:20,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518859930] [2022-07-23 06:38:20,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518859930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:38:20,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:38:20,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-23 06:38:20,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008937426] [2022-07-23 06:38:20,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:38:20,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 06:38:20,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:38:20,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 06:38:20,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:38:20,734 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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) [2022-07-23 06:38:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:38:21,474 INFO L93 Difference]: Finished difference Result 185 states and 201 transitions. [2022-07-23 06:38:21,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 06:38:21,475 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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 38 [2022-07-23 06:38:21,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:38:21,475 INFO L225 Difference]: With dead ends: 185 [2022-07-23 06:38:21,475 INFO L226 Difference]: Without dead ends: 185 [2022-07-23 06:38:21,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-07-23 06:38:21,476 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 534 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:38:21,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 399 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 06:38:21,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-23 06:38:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 125. [2022-07-23 06:38:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.4747474747474747) internal successors, (146), 120 states have internal predecessors, (146), 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) [2022-07-23 06:38:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2022-07-23 06:38:21,479 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 38 [2022-07-23 06:38:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:38:21,479 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2022-07-23 06:38:21,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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) [2022-07-23 06:38:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2022-07-23 06:38:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-23 06:38:21,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:38:21,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:38:21,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-07-23 06:38:21,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:38:21,693 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:38:21,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:38:21,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1134972528, now seen corresponding path program 1 times [2022-07-23 06:38:21,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:38:21,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897973931] [2022-07-23 06:38:21,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:38:21,694 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:38:21,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:38:21,696 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) [2022-07-23 06:38:21,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-23 06:38:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:38:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-23 06:38:21,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:38:22,367 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 [2022-07-23 06:38:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:38:22,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:38:22,422 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:38:22,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897973931] [2022-07-23 06:38:22,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897973931] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:38:22,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:38:22,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 06:38:22,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790123853] [2022-07-23 06:38:22,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:38:22,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 06:38:22,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:38:22,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 06:38:22,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:38:22,423 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 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) [2022-07-23 06:38:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:38:22,430 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2022-07-23 06:38:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 06:38:22,431 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 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 38 [2022-07-23 06:38:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:38:22,431 INFO L225 Difference]: With dead ends: 130 [2022-07-23 06:38:22,431 INFO L226 Difference]: Without dead ends: 130 [2022-07-23 06:38:22,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-07-23 06:38:22,432 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 13 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 06:38:22,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 261 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 53 Unchecked, 0.0s Time] [2022-07-23 06:38:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-23 06:38:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-23 06:38:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 104 states have (on average 1.4519230769230769) internal successors, (151), 125 states have internal predecessors, (151), 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) [2022-07-23 06:38:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2022-07-23 06:38:22,434 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 38 [2022-07-23 06:38:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:38:22,435 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2022-07-23 06:38:22,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 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) [2022-07-23 06:38:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2022-07-23 06:38:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 06:38:22,435 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:38:22,435 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:38:22,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-23 06:38:22,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:38:22,636 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:38:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:38:22,636 INFO L85 PathProgramCache]: Analyzing trace with hash 824410107, now seen corresponding path program 1 times [2022-07-23 06:38:22,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:38:22,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47886018] [2022-07-23 06:38:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:38:22,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:38:22,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:38:22,638 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) [2022-07-23 06:38:22,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-23 06:38:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:38:22,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-23 06:38:22,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:38:22,775 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 [2022-07-23 06:38:22,858 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 17 treesize of output 9 [2022-07-23 06:38:22,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:38:22,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 06:38:22,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:38:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47886018] [2022-07-23 06:38:22,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47886018] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 06:38:22,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 06:38:22,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 06:38:22,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426100180] [2022-07-23 06:38:22,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 06:38:22,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 06:38:22,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:38:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 06:38:22,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-07-23 06:38:22,874 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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) [2022-07-23 06:38:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:38:23,523 INFO L93 Difference]: Finished difference Result 160 states and 188 transitions. [2022-07-23 06:38:23,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 06:38:23,524 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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 39 [2022-07-23 06:38:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:38:23,524 INFO L225 Difference]: With dead ends: 160 [2022-07-23 06:38:23,524 INFO L226 Difference]: Without dead ends: 160 [2022-07-23 06:38:23,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-07-23 06:38:23,525 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 173 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 06:38:23,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 373 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 06:38:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-23 06:38:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2022-07-23 06:38:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 115 states have (on average 1.4608695652173913) internal successors, (168), 136 states have internal predecessors, (168), 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) [2022-07-23 06:38:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 172 transitions. [2022-07-23 06:38:23,528 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 172 transitions. Word has length 39 [2022-07-23 06:38:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:38:23,528 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 172 transitions. [2022-07-23 06:38:23,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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) [2022-07-23 06:38:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 172 transitions. [2022-07-23 06:38:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 06:38:23,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:38:23,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:38:23,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-23 06:38:23,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:38:23,737 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:38:23,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:38:23,737 INFO L85 PathProgramCache]: Analyzing trace with hash -213090349, now seen corresponding path program 1 times [2022-07-23 06:38:23,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:38:23,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882938060] [2022-07-23 06:38:23,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 06:38:23,738 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:38:23,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:38:23,739 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-23 06:38:23,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-23 06:38:23,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 06:38:23,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 06:38:23,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:38:23,893 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 [2022-07-23 06:38:23,967 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 06:38:23,968 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 [2022-07-23 06:38:24,002 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 [2022-07-23 06:38:24,057 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 06:38:24,057 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 19 treesize of output 22 [2022-07-23 06:38:24,147 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 20 [2022-07-23 06:38:24,602 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-23 06:38:24,603 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 35 treesize of output 23 [2022-07-23 06:38:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 06:38:24,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:38:24,759 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 21 [2022-07-23 06:38:24,799 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1002) |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))) is different from false [2022-07-23 06:38:24,805 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1002 (Array (_ BitVec 32) (_ BitVec 32)))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1002) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~new_head~0#1.base|))) is different from false [2022-07-23 06:38:24,815 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 06:38:24,816 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 19 treesize of output 20 [2022-07-23 06:38:24,817 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 33 treesize of output 25 [2022-07-23 06:38:24,820 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 [2022-07-23 06:38:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-23 06:38:25,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-23 06:38:25,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882938060] [2022-07-23 06:38:25,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882938060] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 06:38:25,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 06:38:25,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2022-07-23 06:38:25,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3222390] [2022-07-23 06:38:25,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 06:38:25,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 06:38:25,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-23 06:38:25,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 06:38:25,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=697, Unknown=2, NotChecked=106, Total=870 [2022-07-23 06:38:25,053 INFO L87 Difference]: Start difference. First operand 141 states and 172 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 25 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:38:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 06:38:26,423 INFO L93 Difference]: Finished difference Result 136 states and 166 transitions. [2022-07-23 06:38:26,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 06:38:26,424 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 25 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2022-07-23 06:38:26,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 06:38:26,425 INFO L225 Difference]: With dead ends: 136 [2022-07-23 06:38:26,425 INFO L226 Difference]: Without dead ends: 136 [2022-07-23 06:38:26,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=158, Invalid=1254, Unknown=2, NotChecked=146, Total=1560 [2022-07-23 06:38:26,426 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 33 mSDsluCounter, 1092 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 06:38:26,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1152 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 594 Invalid, 0 Unknown, 145 Unchecked, 0.8s Time] [2022-07-23 06:38:26,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-23 06:38:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-07-23 06:38:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 110 states have (on average 1.4727272727272727) internal successors, (162), 131 states have internal predecessors, (162), 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) [2022-07-23 06:38:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 166 transitions. [2022-07-23 06:38:26,429 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 166 transitions. Word has length 40 [2022-07-23 06:38:26,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 06:38:26,429 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 166 transitions. [2022-07-23 06:38:26,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 25 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 06:38:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 166 transitions. [2022-07-23 06:38:26,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-23 06:38:26,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 06:38:26,430 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 06:38:26,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-07-23 06:38:26,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-23 06:38:26,638 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-07-23 06:38:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 06:38:26,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1053948371, now seen corresponding path program 2 times [2022-07-23 06:38:26,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-23 06:38:26,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909353174] [2022-07-23 06:38:26,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 06:38:26,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-23 06:38:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-23 06:38:26,641 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) [2022-07-23 06:38:26,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-23 06:38:26,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 06:38:26,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 06:38:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 06:38:26,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 06:38:26,888 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 [2022-07-23 06:38:26,999 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 [2022-07-23 06:38:27,004 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 [2022-07-23 06:38:27,095 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-23 06:38:27,095 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 39 treesize of output 29 [2022-07-23 06:38:27,109 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-23 06:38:27,109 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 27 treesize of output 22 [2022-07-23 06:38:27,546 INFO L356 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-07-23 06:38:27,546 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 99 treesize of output 57 [2022-07-23 06:38:27,710 INFO L356 Elim1Store]: treesize reduction 21, result has 36.4 percent of original size [2022-07-23 06:38:27,711 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 44 treesize of output 30 [2022-07-23 06:38:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 06:38:27,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 06:39:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 06:39:19,298 INFO L356 Elim1Store]: treesize reduction 1896, result has 44.4 percent of original size [2022-07-23 06:39:19,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 32476 treesize of output 28054 [2022-07-23 06:39:21,740 INFO L356 Elim1Store]: treesize reduction 198, result has 55.2 percent of original size [2022-07-23 06:39:21,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 117382 treesize of output 105233