./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 2329fc70 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-?-2329fc7 [2023-02-13 23:16:18,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 23:16:18,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 23:16:18,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 23:16:18,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 23:16:18,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 23:16:18,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 23:16:18,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 23:16:18,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 23:16:18,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 23:16:18,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 23:16:18,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 23:16:18,776 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 23:16:18,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 23:16:18,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 23:16:18,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 23:16:18,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 23:16:18,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 23:16:18,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 23:16:18,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 23:16:18,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 23:16:18,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 23:16:18,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 23:16:18,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 23:16:18,795 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 23:16:18,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 23:16:18,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 23:16:18,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 23:16:18,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 23:16:18,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 23:16:18,797 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 23:16:18,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 23:16:18,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 23:16:18,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 23:16:18,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 23:16:18,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 23:16:18,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 23:16:18,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 23:16:18,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 23:16:18,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 23:16:18,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 23:16:18,803 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 23:16:18,826 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 23:16:18,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 23:16:18,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 23:16:18,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 23:16:18,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 23:16:18,827 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 23:16:18,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 23:16:18,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 23:16:18,828 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 23:16:18,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 23:16:18,829 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 23:16:18,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 23:16:18,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 23:16:18,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 23:16:18,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 23:16:18,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 23:16:18,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 23:16:18,830 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 23:16:18,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 23:16:18,830 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 23:16:18,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 23:16:18,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 23:16:18,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 23:16:18,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 23:16:18,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:16:18,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 23:16:18,831 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 23:16:18,831 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 23:16:18,831 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 23:16:18,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 23:16:18,832 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 23:16:18,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 23:16:18,832 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 23:16:18,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 23:16:18,833 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 23:16:18,833 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bec73cbd355af8995620266d1bb50e13212a1740ed8bd583620b6985b8fd569c [2023-02-13 23:16:19,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 23:16:19,039 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 23:16:19,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 23:16:19,042 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 23:16:19,042 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 23:16:19,043 INFO L432 ainManager$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 [2023-02-13 23:16:20,093 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 23:16:20,231 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 23:16:20,231 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/verisec_sendmail_tTflag_arr_one_loop.c [2023-02-13 23:16:20,237 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aa89076e/01d6628b0e6b45558d41918febe44018/FLAGe92b02968 [2023-02-13 23:16:20,253 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5aa89076e/01d6628b0e6b45558d41918febe44018 [2023-02-13 23:16:20,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 23:16:20,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 23:16:20,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 23:16:20,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 23:16:20,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 23:16:20,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcec39b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20, skipping insertion in model container [2023-02-13 23:16:20,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 23:16:20,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 23:16:20,393 WARN L237 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] [2023-02-13 23:16:20,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:16:20,423 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 23:16:20,432 WARN L237 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] [2023-02-13 23:16:20,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:16:20,454 INFO L208 MainTranslator]: Completed translation [2023-02-13 23:16:20,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20 WrapperNode [2023-02-13 23:16:20,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 23:16:20,455 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 23:16:20,455 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 23:16:20,456 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 23:16:20,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,484 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-02-13 23:16:20,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 23:16:20,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 23:16:20,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 23:16:20,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 23:16:20,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,501 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,503 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 23:16:20,503 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 23:16:20,503 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 23:16:20,503 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 23:16:20,504 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (1/1) ... [2023-02-13 23:16:20,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:16:20,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:16:20,535 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) [2023-02-13 23:16:20,537 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 [2023-02-13 23:16:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 23:16:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 23:16:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 23:16:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 23:16:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 23:16:20,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 23:16:20,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 23:16:20,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 23:16:20,612 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 23:16:20,614 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 23:16:20,766 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 23:16:20,770 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 23:16:20,770 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-13 23:16:20,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:16:20 BoogieIcfgContainer [2023-02-13 23:16:20,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 23:16:20,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 23:16:20,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 23:16:20,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 23:16:20,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 11:16:20" (1/3) ... [2023-02-13 23:16:20,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553c1b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:16:20, skipping insertion in model container [2023-02-13 23:16:20,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:16:20" (2/3) ... [2023-02-13 23:16:20,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@553c1b12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:16:20, skipping insertion in model container [2023-02-13 23:16:20,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:16:20" (3/3) ... [2023-02-13 23:16:20,776 INFO L112 eAbstractionObserver]: Analyzing ICFG verisec_sendmail_tTflag_arr_one_loop.c [2023-02-13 23:16:20,803 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 23:16:20,803 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 23:16:20,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 23:16:20,878 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2f843cd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 23:16:20,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 23:16:20,883 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) [2023-02-13 23:16:20,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-13 23:16:20,887 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:16:20,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:16:20,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:16:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:16:20,893 INFO L85 PathProgramCache]: Analyzing trace with hash 212076531, now seen corresponding path program 1 times [2023-02-13 23:16:20,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:16:20,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827554793] [2023-02-13 23:16:20,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:16:20,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:16:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:16:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:16:21,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:16:21,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827554793] [2023-02-13 23:16:21,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827554793] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:16:21,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:16:21,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 23:16:21,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214664368] [2023-02-13 23:16:21,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:16:21,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 23:16:21,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:16:21,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 23:16:21,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:16:21,065 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) [2023-02-13 23:16:21,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:16:21,104 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2023-02-13 23:16:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 23:16:21,107 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 [2023-02-13 23:16:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:16:21,112 INFO L225 Difference]: With dead ends: 35 [2023-02-13 23:16:21,113 INFO L226 Difference]: Without dead ends: 17 [2023-02-13 23:16:21,117 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 [2023-02-13 23:16:21,120 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 [2023-02-13 23:16:21,121 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] [2023-02-13 23:16:21,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-13 23:16:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 11. [2023-02-13 23:16:21,148 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) [2023-02-13 23:16:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-02-13 23:16:21,149 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2023-02-13 23:16:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:16:21,150 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-02-13 23:16:21,150 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) [2023-02-13 23:16:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-02-13 23:16:21,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-13 23:16:21,151 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:16:21,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:16:21,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 23:16:21,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:16:21,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:16:21,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1435974389, now seen corresponding path program 1 times [2023-02-13 23:16:21,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:16:21,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495366998] [2023-02-13 23:16:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:16:21,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:16:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:16:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:16:21,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:16:21,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495366998] [2023-02-13 23:16:21,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495366998] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:16:21,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533181469] [2023-02-13 23:16:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:16:21,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:16:21,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:16:21,266 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) [2023-02-13 23:16:21,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 23:16:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:16:21,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 23:16:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:16:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:16:21,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:16:21,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:16:21,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533181469] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:16:21,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:16:21,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 23:16:21,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177706940] [2023-02-13 23:16:21,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:16:21,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:16:21,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:16:21,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:16:21,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:16:21,388 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) [2023-02-13 23:16:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:16:21,432 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-02-13 23:16:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 23:16:21,434 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 [2023-02-13 23:16:21,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:16:21,435 INFO L225 Difference]: With dead ends: 33 [2023-02-13 23:16:21,435 INFO L226 Difference]: Without dead ends: 27 [2023-02-13 23:16:21,436 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 [2023-02-13 23:16:21,437 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:16:21,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 14 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:16:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-13 23:16:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 17. [2023-02-13 23:16:21,443 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) [2023-02-13 23:16:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-02-13 23:16:21,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2023-02-13 23:16:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:16:21,444 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-02-13 23:16:21,444 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) [2023-02-13 23:16:21,444 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-02-13 23:16:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-13 23:16:21,445 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:16:21,445 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:16:21,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-13 23:16:21,649 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 [2023-02-13 23:16:21,650 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:16:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:16:21,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1662320891, now seen corresponding path program 2 times [2023-02-13 23:16:21,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:16:21,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265378943] [2023-02-13 23:16:21,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:16:21,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:16:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:16:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 23:16:21,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:16:21,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265378943] [2023-02-13 23:16:21,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265378943] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:16:21,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:16:21,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 23:16:21,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313567685] [2023-02-13 23:16:21,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:16:21,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 23:16:21,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:16:21,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 23:16:21,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 23:16:21,773 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) [2023-02-13 23:16:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:16:21,789 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2023-02-13 23:16:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 23:16:21,789 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 [2023-02-13 23:16:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:16:21,790 INFO L225 Difference]: With dead ends: 22 [2023-02-13 23:16:21,790 INFO L226 Difference]: Without dead ends: 18 [2023-02-13 23:16:21,790 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 [2023-02-13 23:16:21,791 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 [2023-02-13 23:16:21,791 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] [2023-02-13 23:16:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-13 23:16:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-13 23:16:21,793 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) [2023-02-13 23:16:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-13 23:16:21,794 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2023-02-13 23:16:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:16:21,794 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-13 23:16:21,794 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) [2023-02-13 23:16:21,794 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-13 23:16:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-13 23:16:21,795 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:16:21,795 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:16:21,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-13 23:16:21,795 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:16:21,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:16:21,796 INFO L85 PathProgramCache]: Analyzing trace with hash -5994546, now seen corresponding path program 1 times [2023-02-13 23:16:21,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:16:21,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731374426] [2023-02-13 23:16:21,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:16:21,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:16:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:16:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:16:21,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:16:21,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731374426] [2023-02-13 23:16:21,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731374426] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:16:21,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519831549] [2023-02-13 23:16:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:16:21,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:16:21,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:16:21,978 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) [2023-02-13 23:16:21,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 23:16:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:16:22,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 23:16:22,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:16:22,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:16:22,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:16:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:16:22,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519831549] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:16:22,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:16:22,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-13 23:16:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7158495] [2023-02-13 23:16:22,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:16:22,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-13 23:16:22,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:16:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-13 23:16:22,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-13 23:16:22,124 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) [2023-02-13 23:16:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:16:22,167 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2023-02-13 23:16:22,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-13 23:16:22,168 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 [2023-02-13 23:16:22,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:16:22,169 INFO L225 Difference]: With dead ends: 42 [2023-02-13 23:16:22,169 INFO L226 Difference]: Without dead ends: 35 [2023-02-13 23:16:22,170 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 [2023-02-13 23:16:22,171 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:16:22,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:16:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-13 23:16:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2023-02-13 23:16:22,180 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) [2023-02-13 23:16:22,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-02-13 23:16:22,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2023-02-13 23:16:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:16:22,182 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-02-13 23:16:22,182 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) [2023-02-13 23:16:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-02-13 23:16:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-13 23:16:22,183 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:16:22,183 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:16:22,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-13 23:16:22,387 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 [2023-02-13 23:16:22,388 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:16:22,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:16:22,389 INFO L85 PathProgramCache]: Analyzing trace with hash 776585922, now seen corresponding path program 2 times [2023-02-13 23:16:22,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:16:22,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623195581] [2023-02-13 23:16:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:16:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:16:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:16:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:16:22,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:16:22,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623195581] [2023-02-13 23:16:22,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623195581] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:16:22,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497727951] [2023-02-13 23:16:22,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 23:16:22,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:16:22,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:16:22,546 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) [2023-02-13 23:16:22,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 23:16:22,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 23:16:22,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:16:22,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 23:16:22,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:16:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:16:22,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:16:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:16:22,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497727951] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:16:22,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:16:22,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2023-02-13 23:16:22,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642265083] [2023-02-13 23:16:22,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:16:22,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-13 23:16:22,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:16:22,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-13 23:16:22,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2023-02-13 23:16:22,713 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) [2023-02-13 23:16:22,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:16:22,743 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-13 23:16:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-13 23:16:22,743 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 [2023-02-13 23:16:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:16:22,744 INFO L225 Difference]: With dead ends: 44 [2023-02-13 23:16:22,744 INFO L226 Difference]: Without dead ends: 37 [2023-02-13 23:16:22,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 11 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2023-02-13 23:16:22,745 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:16:22,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:16:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-13 23:16:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2023-02-13 23:16:22,747 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) [2023-02-13 23:16:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-02-13 23:16:22,748 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2023-02-13 23:16:22,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:16:22,748 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-02-13 23:16:22,748 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) [2023-02-13 23:16:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-02-13 23:16:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-13 23:16:22,749 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:16:22,749 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:16:22,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-13 23:16:22,956 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 [2023-02-13 23:16:22,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:16:22,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:16:22,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1133517568, now seen corresponding path program 3 times [2023-02-13 23:16:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:16:22,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832378280] [2023-02-13 23:16:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:16:22,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:16:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:16:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-13 23:16:23,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:16:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832378280] [2023-02-13 23:16:23,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832378280] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:16:23,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781580917] [2023-02-13 23:16:23,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 23:16:23,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:16:23,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:16:23,085 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) [2023-02-13 23:16:23,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 23:16:23,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-13 23:16:23,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:16:23,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-13 23:16:23,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:16:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-13 23:16:23,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:16:36,883 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 38 DAG size of output: 23 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:16:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-13 23:16:36,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781580917] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:16:36,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:16:36,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-02-13 23:16:36,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161242875] [2023-02-13 23:16:36,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:16:36,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:16:36,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:16:36,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:16:36,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:16:36,889 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) [2023-02-13 23:16:37,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:16:37,037 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2023-02-13 23:16:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-13 23:16:37,038 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 [2023-02-13 23:16:37,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:16:37,038 INFO L225 Difference]: With dead ends: 40 [2023-02-13 23:16:37,038 INFO L226 Difference]: Without dead ends: 34 [2023-02-13 23:16:37,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-02-13 23:16:37,039 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:16:37,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:16:37,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-13 23:16:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-13 23:16:37,042 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) [2023-02-13 23:16:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2023-02-13 23:16:37,042 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2023-02-13 23:16:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:16:37,042 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2023-02-13 23:16:37,042 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) [2023-02-13 23:16:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2023-02-13 23:16:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-13 23:16:37,043 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:16:37,043 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:16:37,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-13 23:16:37,249 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 [2023-02-13 23:16:37,249 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:16:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:16:37,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1664602656, now seen corresponding path program 4 times [2023-02-13 23:16:37,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:16:37,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714591740] [2023-02-13 23:16:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:16:37,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:16:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:16:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2023-02-13 23:16:37,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:16:37,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714591740] [2023-02-13 23:16:37,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714591740] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:16:37,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634358705] [2023-02-13 23:16:37,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 23:16:37,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:16:37,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:16:37,608 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) [2023-02-13 23:16:37,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 23:16:37,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 23:16:37,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:16:37,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-13 23:16:37,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:16:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-02-13 23:16:38,668 INFO L328 TraceCheckSpWp]: Computing backward predicates...