./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash bec73cbd355af8995620266d1bb50e13212a1740ed8bd583620b6985b8fd569c --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:28:39,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:28:39,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:28:39,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:28:39,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:28:39,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:28:39,717 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:28:39,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:28:39,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:28:39,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:28:39,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:28:39,721 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:28:39,721 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:28:39,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:28:39,722 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:28:39,723 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:28:39,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:28:39,724 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:28:39,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:28:39,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:28:39,727 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:28:39,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:28:39,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:28:39,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:28:39,729 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:28:39,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:28:39,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:28:39,737 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:28:39,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:28:39,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:28:39,738 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:28:39,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:28:39,739 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:28:39,740 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:28:39,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:28:39,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:28:39,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:28:39,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:28:39,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:28:39,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:28:39,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:28:39,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:28:39,747 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:28:39,761 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:28:39,764 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:28:39,764 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:28:39,764 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:28:39,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:28:39,765 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:28:39,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:28:39,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:28:39,766 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:28:39,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:28:39,767 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:28:39,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:28:39,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:28:39,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:28:39,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:28:39,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:28:39,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:28:39,768 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:28:39,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:28:39,768 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:28:39,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:28:39,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:28:39,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:28:39,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:28:39,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:28:39,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:28:39,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:28:39,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:28:39,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:28:39,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:28:39,770 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:28:39,770 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:28:39,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:28:39,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bec73cbd355af8995620266d1bb50e13212a1740ed8bd583620b6985b8fd569c [2022-07-20 22:28:39,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:28:40,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:28:40,005 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:28:40,006 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:28:40,007 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:28:40,008 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2022-07-20 22:28:40,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435f56539/4f1a4e6159b24e04bab7883f01cd44ba/FLAG1149f8953 [2022-07-20 22:28:40,399 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:28:40,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2022-07-20 22:28:40,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435f56539/4f1a4e6159b24e04bab7883f01cd44ba/FLAG1149f8953 [2022-07-20 22:28:40,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435f56539/4f1a4e6159b24e04bab7883f01cd44ba [2022-07-20 22:28:40,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:28:40,430 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:28:40,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:28:40,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:28:40,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:28:40,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28e57f9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40, skipping insertion in model container [2022-07-20 22:28:40,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:28:40,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:28:40,598 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/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c[387,400] [2022-07-20 22:28:40,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:28:40,620 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:28:40,630 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/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c[387,400] [2022-07-20 22:28:40,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:28:40,654 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:28:40,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40 WrapperNode [2022-07-20 22:28:40,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:28:40,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:28:40,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:28:40,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:28:40,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,684 INFO L137 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-07-20 22:28:40,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:28:40,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:28:40,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:28:40,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:28:40,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:28:40,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:28:40,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:28:40,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:28:40,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (1/1) ... [2022-07-20 22:28:40,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:28:40,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:28:40,744 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) [2022-07-20 22:28:40,752 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 [2022-07-20 22:28:40,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:28:40,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:28:40,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 22:28:40,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:28:40,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:28:40,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:28:40,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:28:40,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 22:28:40,817 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:28:40,818 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:28:40,896 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:28:40,900 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:28:40,900 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 22:28:40,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:28:40 BoogieIcfgContainer [2022-07-20 22:28:40,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:28:40,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:28:40,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:28:40,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:28:40,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:28:40" (1/3) ... [2022-07-20 22:28:40,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5775af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:28:40, skipping insertion in model container [2022-07-20 22:28:40,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:28:40" (2/3) ... [2022-07-20 22:28:40,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5775af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:28:40, skipping insertion in model container [2022-07-20 22:28:40,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:28:40" (3/3) ... [2022-07-20 22:28:40,908 INFO L111 eAbstractionObserver]: Analyzing ICFG verisec_sendmail_tTflag_arr_one_loop.c [2022-07-20 22:28:40,918 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:28:40,919 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:28:40,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:28:40,968 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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@432b2aad, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3679d70e [2022-07-20 22:28:40,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:28:40,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 22:28:40,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:40,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:40,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:40,980 INFO L85 PathProgramCache]: Analyzing trace with hash 212076531, now seen corresponding path program 1 times [2022-07-20 22:28:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:28:40,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79347946] [2022-07-20 22:28:40,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:40,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:28:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:41,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:28:41,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:28:41,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79347946] [2022-07-20 22:28:41,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79347946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:28:41,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:28:41,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:28:41,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221038218] [2022-07-20 22:28:41,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:28:41,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:28:41,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:28:41,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:28:41,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:28:41,145 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:41,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:41,182 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2022-07-20 22:28:41,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:28:41,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 22:28:41,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:41,195 INFO L225 Difference]: With dead ends: 35 [2022-07-20 22:28:41,195 INFO L226 Difference]: Without dead ends: 17 [2022-07-20 22:28:41,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:28:41,211 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 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 [2022-07-20 22:28:41,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:28:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-20 22:28:41,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 11. [2022-07-20 22:28:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:41,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-07-20 22:28:41,231 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-07-20 22:28:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:41,232 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-07-20 22:28:41,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-07-20 22:28:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 22:28:41,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:41,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:41,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:28:41,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:41,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:41,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1435974389, now seen corresponding path program 1 times [2022-07-20 22:28:41,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:28:41,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863320478] [2022-07-20 22:28:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:41,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:28:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:28:41,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:28:41,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863320478] [2022-07-20 22:28:41,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863320478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:28:41,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707489628] [2022-07-20 22:28:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:41,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:28:41,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:28:41,287 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) [2022-07-20 22:28:41,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:28:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:41,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:28:41,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:28:41,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:28:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:28:41,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707489628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:28:41,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:28:41,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 22:28:41,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408135527] [2022-07-20 22:28:41,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:28:41,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:28:41,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:28:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:28:41,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:28:41,438 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:41,485 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-07-20 22:28:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 22:28:41,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 22:28:41,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:41,486 INFO L225 Difference]: With dead ends: 33 [2022-07-20 22:28:41,486 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 22:28:41,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:28:41,488 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:41,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 14 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:28:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 22:28:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2022-07-20 22:28:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-07-20 22:28:41,491 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2022-07-20 22:28:41,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:41,491 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-07-20 22:28:41,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-07-20 22:28:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 22:28:41,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:41,492 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:41,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:41,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:28:41,693 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:41,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:41,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1662320891, now seen corresponding path program 2 times [2022-07-20 22:28:41,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:28:41,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446375719] [2022-07-20 22:28:41,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:41,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:28:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 22:28:41,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:28:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446375719] [2022-07-20 22:28:41,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446375719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:28:41,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:28:41,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:28:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324308706] [2022-07-20 22:28:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:28:41,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:28:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:28:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:28:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:28:41,773 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:41,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:41,789 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-07-20 22:28:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:28:41,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 22:28:41,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:41,791 INFO L225 Difference]: With dead ends: 22 [2022-07-20 22:28:41,791 INFO L226 Difference]: Without dead ends: 18 [2022-07-20 22:28:41,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:28:41,794 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:41,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:28:41,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-20 22:28:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-20 22:28:41,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-20 22:28:41,804 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-07-20 22:28:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:41,804 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-20 22:28:41,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-20 22:28:41,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 22:28:41,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:41,805 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:41,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:28:41,805 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:41,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash -5994546, now seen corresponding path program 1 times [2022-07-20 22:28:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:28:41,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213051090] [2022-07-20 22:28:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:41,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:28:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:28:41,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:28:41,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213051090] [2022-07-20 22:28:41,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213051090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:28:41,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485425881] [2022-07-20 22:28:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:41,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:28:41,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:28:41,896 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) [2022-07-20 22:28:41,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:28:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:28:41,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:28:42,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:28:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:28:42,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485425881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:28:42,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:28:42,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-20 22:28:42,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708671231] [2022-07-20 22:28:42,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:28:42,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 22:28:42,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:28:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 22:28:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:28:42,063 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:42,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:42,117 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-07-20 22:28:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 22:28:42,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-20 22:28:42,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:42,119 INFO L225 Difference]: With dead ends: 42 [2022-07-20 22:28:42,119 INFO L226 Difference]: Without dead ends: 35 [2022-07-20 22:28:42,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:28:42,122 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:42,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 26 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:28:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-20 22:28:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-07-20 22:28:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-07-20 22:28:42,132 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2022-07-20 22:28:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:42,132 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-07-20 22:28:42,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-07-20 22:28:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 22:28:42,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:42,133 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:42,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:42,333 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,SelfDestructingSolverStorable3 [2022-07-20 22:28:42,334 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:42,335 INFO L85 PathProgramCache]: Analyzing trace with hash 776585922, now seen corresponding path program 2 times [2022-07-20 22:28:42,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:28:42,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378977377] [2022-07-20 22:28:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:42,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:28:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:42,486 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:28:42,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:28:42,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378977377] [2022-07-20 22:28:42,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378977377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:28:42,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044078672] [2022-07-20 22:28:42,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:28:42,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:28:42,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:28:42,497 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) [2022-07-20 22:28:42,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:28:42,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:28:42,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:28:42,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 22:28:42,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:28:42,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:28:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:28:42,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044078672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:28:42,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:28:42,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2022-07-20 22:28:42,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185060241] [2022-07-20 22:28:42,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:28:42,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 22:28:42,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:28:42,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 22:28:42,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:28:42,651 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:42,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:42,693 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-07-20 22:28:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 22:28:42,694 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-20 22:28:42,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:42,696 INFO L225 Difference]: With dead ends: 44 [2022-07-20 22:28:42,696 INFO L226 Difference]: Without dead ends: 37 [2022-07-20 22:28:42,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:28:42,697 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:42,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:28:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-20 22:28:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-07-20 22:28:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:42,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-07-20 22:28:42,708 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2022-07-20 22:28:42,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:42,709 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-07-20 22:28:42,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:42,709 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-07-20 22:28:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-20 22:28:42,710 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:42,710 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:42,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:42,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:28:42,915 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:42,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:42,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1133517568, now seen corresponding path program 3 times [2022-07-20 22:28:42,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:28:42,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047640671] [2022-07-20 22:28:42,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:42,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:28:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:28:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 22:28:42,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:28:42,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047640671] [2022-07-20 22:28:42,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047640671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:28:42,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899130405] [2022-07-20 22:28:42,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:28:42,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:28:42,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:28:42,995 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) [2022-07-20 22:28:43,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:28:43,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 22:28:43,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:28:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 22:28:43,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:28:43,573 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 22:28:43,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:28:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 22:28:46,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899130405] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:28:46,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:28:46,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-07-20 22:28:46,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513646252] [2022-07-20 22:28:46,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:28:46,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 22:28:46,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:28:46,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 22:28:46,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:28:46,845 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:28:47,949 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-07-20 22:28:47,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 22:28:47,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-20 22:28:47,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:28:47,950 INFO L225 Difference]: With dead ends: 40 [2022-07-20 22:28:47,950 INFO L226 Difference]: Without dead ends: 34 [2022-07-20 22:28:47,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-20 22:28:47,951 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:28:47,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:28:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-20 22:28:47,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-07-20 22:28:47,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-07-20 22:28:47,957 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2022-07-20 22:28:47,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:28:47,957 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-07-20 22:28:47,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:28:47,958 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-07-20 22:28:47,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 22:28:47,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:28:47,959 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:28:47,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:28:48,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:28:48,171 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:28:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:28:48,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1664602656, now seen corresponding path program 4 times [2022-07-20 22:28:48,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:28:48,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029183922] [2022-07-20 22:28:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:28:48,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:28:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:29:07,893 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 22:29:07,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:29:07,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029183922] [2022-07-20 22:29:07,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029183922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:29:07,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221988133] [2022-07-20 22:29:07,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:29:07,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:29:07,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:29:07,895 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) [2022-07-20 22:29:07,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:29:08,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:29:08,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:29:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 22:29:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:30:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-20 22:30:10,619 INFO L328 TraceCheckSpWp]: Computing backward predicates...