./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i -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 c1599706a72281425c0fc51552af364ca390697b315c5af0e88e5d6de4e668c6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 15:18:47,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 15:18:47,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 15:18:47,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 15:18:47,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 15:18:47,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 15:18:47,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 15:18:47,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 15:18:47,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 15:18:47,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 15:18:47,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 15:18:47,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 15:18:47,075 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 15:18:47,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 15:18:47,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 15:18:47,077 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 15:18:47,078 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 15:18:47,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 15:18:47,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 15:18:47,081 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 15:18:47,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 15:18:47,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 15:18:47,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 15:18:47,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 15:18:47,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 15:18:47,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 15:18:47,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 15:18:47,087 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 15:18:47,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 15:18:47,088 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 15:18:47,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 15:18:47,089 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 15:18:47,090 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 15:18:47,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 15:18:47,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 15:18:47,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 15:18:47,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 15:18:47,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 15:18:47,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 15:18:47,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 15:18:47,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 15:18:47,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 15:18:47,109 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 15:18:47,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 15:18:47,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 15:18:47,109 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 15:18:47,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 15:18:47,110 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 15:18:47,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 15:18:47,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 15:18:47,111 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 15:18:47,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 15:18:47,111 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 15:18:47,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 15:18:47,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 15:18:47,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 15:18:47,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 15:18:47,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 15:18:47,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 15:18:47,112 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 15:18:47,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 15:18:47,113 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 15:18:47,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 15:18:47,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 15:18:47,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 15:18:47,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 15:18:47,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:18:47,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 15:18:47,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 15:18:47,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 15:18:47,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 15:18:47,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 15:18:47,114 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 15:18:47,114 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 15:18:47,114 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 15:18:47,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 15:18:47,115 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 15:18:47,115 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1599706a72281425c0fc51552af364ca390697b315c5af0e88e5d6de4e668c6 [2023-02-18 15:18:47,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 15:18:47,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 15:18:47,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 15:18:47,326 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 15:18:47,326 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 15:18:47,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2023-02-18 15:18:48,336 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 15:18:48,480 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 15:18:48,480 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i [2023-02-18 15:18:48,485 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ab3e8ec/f98e9322c72943b8928b8faaa3abe337/FLAG0cb3631d2 [2023-02-18 15:18:48,496 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6ab3e8ec/f98e9322c72943b8928b8faaa3abe337 [2023-02-18 15:18:48,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 15:18:48,499 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 15:18:48,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 15:18:48,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 15:18:48,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 15:18:48,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a1d2699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48, skipping insertion in model container [2023-02-18 15:18:48,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 15:18:48,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 15:18:48,622 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/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i[882,895] [2023-02-18 15:18:48,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:18:48,659 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 15:18:48,674 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/loops/verisec_OpenSER_cases1_stripFullBoth_arr.i[882,895] [2023-02-18 15:18:48,684 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 15:18:48,694 INFO L208 MainTranslator]: Completed translation [2023-02-18 15:18:48,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48 WrapperNode [2023-02-18 15:18:48,695 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 15:18:48,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 15:18:48,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 15:18:48,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 15:18:48,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,721 INFO L138 Inliner]: procedures = 42, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 147 [2023-02-18 15:18:48,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 15:18:48,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 15:18:48,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 15:18:48,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 15:18:48,728 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,742 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 15:18:48,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 15:18:48,745 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 15:18:48,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 15:18:48,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (1/1) ... [2023-02-18 15:18:48,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 15:18:48,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:18:48,785 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) [2023-02-18 15:18:48,787 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 [2023-02-18 15:18:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 15:18:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 15:18:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 15:18:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 15:18:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 15:18:48,837 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2023-02-18 15:18:48,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 15:18:48,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 15:18:48,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 15:18:48,894 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 15:18:48,895 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 15:18:49,015 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 15:18:49,020 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 15:18:49,020 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 15:18:49,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:18:49 BoogieIcfgContainer [2023-02-18 15:18:49,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 15:18:49,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 15:18:49,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 15:18:49,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 15:18:49,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 03:18:48" (1/3) ... [2023-02-18 15:18:49,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff0ec63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:18:49, skipping insertion in model container [2023-02-18 15:18:49,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 03:18:48" (2/3) ... [2023-02-18 15:18:49,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ff0ec63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 03:18:49, skipping insertion in model container [2023-02-18 15:18:49,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:18:49" (3/3) ... [2023-02-18 15:18:49,028 INFO L112 eAbstractionObserver]: Analyzing ICFG verisec_OpenSER_cases1_stripFullBoth_arr.i [2023-02-18 15:18:49,039 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 15:18:49,040 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 15:18:49,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 15:18:49,091 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;@14822c11, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 15:18:49,092 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 15:18:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 15:18:49,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:49,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:49,107 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1672152255, now seen corresponding path program 1 times [2023-02-18 15:18:49,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:49,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973001386] [2023-02-18 15:18:49,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:49,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:49,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:18:49,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:49,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973001386] [2023-02-18 15:18:49,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973001386] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:18:49,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:18:49,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 15:18:49,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135496799] [2023-02-18 15:18:49,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:18:49,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 15:18:49,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:49,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 15:18:49,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 15:18:49,385 INFO L87 Difference]: Start difference. First operand has 37 states, 35 states have (on average 1.542857142857143) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2023-02-18 15:18:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:49,405 INFO L93 Difference]: Finished difference Result 72 states and 106 transitions. [2023-02-18 15:18:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 15:18:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-18 15:18:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:49,412 INFO L225 Difference]: With dead ends: 72 [2023-02-18 15:18:49,412 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 15:18:49,414 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 [2023-02-18 15:18:49,416 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:49,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 92 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:18:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 15:18:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-02-18 15:18:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2023-02-18 15:18:49,437 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2023-02-18 15:18:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:49,437 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2023-02-18 15:18:49,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 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) [2023-02-18 15:18:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-02-18 15:18:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 15:18:49,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:49,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:49,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 15:18:49,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:49,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1194375668, now seen corresponding path program 1 times [2023-02-18 15:18:49,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:49,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557724251] [2023-02-18 15:18:49,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:49,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:49,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:18:49,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:49,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557724251] [2023-02-18 15:18:49,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557724251] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:18:49,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283788194] [2023-02-18 15:18:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:49,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:49,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:18:49,573 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) [2023-02-18 15:18:49,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 15:18:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-18 15:18:49,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:18:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:18:49,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 15:18:49,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283788194] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:18:49,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 15:18:49,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-18 15:18:49,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825519358] [2023-02-18 15:18:49,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:18:49,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 15:18:49,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:49,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 15:18:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 15:18:49,700 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:49,719 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2023-02-18 15:18:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 15:18:49,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2023-02-18 15:18:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:49,722 INFO L225 Difference]: With dead ends: 60 [2023-02-18 15:18:49,722 INFO L226 Difference]: Without dead ends: 34 [2023-02-18 15:18:49,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 15:18:49,725 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:49,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:18:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-18 15:18:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-02-18 15:18:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2023-02-18 15:18:49,732 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 25 [2023-02-18 15:18:49,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:49,733 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2023-02-18 15:18:49,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:49,733 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2023-02-18 15:18:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 15:18:49,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:49,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:49,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 15:18:49,939 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 [2023-02-18 15:18:49,940 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:49,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:49,941 INFO L85 PathProgramCache]: Analyzing trace with hash -85488010, now seen corresponding path program 1 times [2023-02-18 15:18:49,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:49,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079460324] [2023-02-18 15:18:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:49,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:18:50,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:50,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079460324] [2023-02-18 15:18:50,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079460324] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:18:50,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383596578] [2023-02-18 15:18:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:50,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:50,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:18:50,041 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) [2023-02-18 15:18:50,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 15:18:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:50,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 15:18:50,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:18:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 15:18:50,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 15:18:50,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383596578] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:18:50,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 15:18:50,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-02-18 15:18:50,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351818610] [2023-02-18 15:18:50,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:18:50,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 15:18:50,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:50,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 15:18:50,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:18:50,166 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:50,206 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2023-02-18 15:18:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 15:18:50,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2023-02-18 15:18:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:50,207 INFO L225 Difference]: With dead ends: 85 [2023-02-18 15:18:50,208 INFO L226 Difference]: Without dead ends: 58 [2023-02-18 15:18:50,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:18:50,209 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:50,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 113 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:18:50,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-18 15:18:50,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2023-02-18 15:18:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:50,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-02-18 15:18:50,212 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 25 [2023-02-18 15:18:50,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:50,213 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-02-18 15:18:50,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:50,213 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-02-18 15:18:50,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 15:18:50,214 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:50,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:50,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 15:18:50,421 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,SelfDestructingSolverStorable2 [2023-02-18 15:18:50,421 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:50,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:50,422 INFO L85 PathProgramCache]: Analyzing trace with hash -26382666, now seen corresponding path program 1 times [2023-02-18 15:18:50,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:50,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950341490] [2023-02-18 15:18:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:50,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:18:50,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:50,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950341490] [2023-02-18 15:18:50,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950341490] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:18:50,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891884097] [2023-02-18 15:18:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:50,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:50,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:18:50,485 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) [2023-02-18 15:18:50,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 15:18:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:50,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 15:18:50,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:18:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:18:50,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:18:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:18:50,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891884097] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:18:50,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:18:50,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-18 15:18:50,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405272849] [2023-02-18 15:18:50,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:18:50,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 15:18:50,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:50,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 15:18:50,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:18:50,568 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2023-02-18 15:18:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:50,581 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2023-02-18 15:18:50,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 15:18:50,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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 25 [2023-02-18 15:18:50,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:50,582 INFO L225 Difference]: With dead ends: 77 [2023-02-18 15:18:50,582 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 15:18:50,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:18:50,583 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 116 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 [2023-02-18 15:18:50,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 116 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:18:50,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 15:18:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-18 15:18:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-02-18 15:18:50,586 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2023-02-18 15:18:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:50,587 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-02-18 15:18:50,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2023-02-18 15:18:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-02-18 15:18:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:18:50,588 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:50,588 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:50,609 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 15:18:50,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:50,793 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:50,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1034544144, now seen corresponding path program 2 times [2023-02-18 15:18:50,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:50,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246329295] [2023-02-18 15:18:50,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:50,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:18:50,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:50,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246329295] [2023-02-18 15:18:50,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246329295] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:18:50,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285779860] [2023-02-18 15:18:50,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:18:50,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:50,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:18:50,898 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) [2023-02-18 15:18:50,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 15:18:50,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-02-18 15:18:50,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:18:50,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 15:18:50,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:18:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:18:50,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 15:18:50,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285779860] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:18:50,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 15:18:50,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-02-18 15:18:50,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107623549] [2023-02-18 15:18:50,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:18:50,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 15:18:50,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:50,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 15:18:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-18 15:18:50,988 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:51,056 INFO L93 Difference]: Finished difference Result 127 states and 163 transitions. [2023-02-18 15:18:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 15:18:51,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2023-02-18 15:18:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:51,057 INFO L225 Difference]: With dead ends: 127 [2023-02-18 15:18:51,057 INFO L226 Difference]: Without dead ends: 75 [2023-02-18 15:18:51,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:18:51,058 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:51,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 132 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:18:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-18 15:18:51,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 51. [2023-02-18 15:18:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-02-18 15:18:51,062 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 31 [2023-02-18 15:18:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:51,063 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-02-18 15:18:51,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-02-18 15:18:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 15:18:51,063 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:51,064 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:51,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 15:18:51,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:51,269 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:51,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:51,269 INFO L85 PathProgramCache]: Analyzing trace with hash -776378706, now seen corresponding path program 1 times [2023-02-18 15:18:51,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:51,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903096622] [2023-02-18 15:18:51,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:51,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:18:51,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:51,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903096622] [2023-02-18 15:18:51,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903096622] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:18:51,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:18:51,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 15:18:51,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473001831] [2023-02-18 15:18:51,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:18:51,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 15:18:51,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 15:18:51,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:18:51,375 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:51,446 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2023-02-18 15:18:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 15:18:51,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2023-02-18 15:18:51,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:51,448 INFO L225 Difference]: With dead ends: 111 [2023-02-18 15:18:51,448 INFO L226 Difference]: Without dead ends: 109 [2023-02-18 15:18:51,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:18:51,449 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 83 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:51,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 163 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:18:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-18 15:18:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 74. [2023-02-18 15:18:51,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 73 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2023-02-18 15:18:51,454 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 31 [2023-02-18 15:18:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:51,454 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2023-02-18 15:18:51,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2023-02-18 15:18:51,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 15:18:51,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:51,455 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:51,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 15:18:51,456 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1117920663, now seen corresponding path program 1 times [2023-02-18 15:18:51,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:51,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900788923] [2023-02-18 15:18:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:51,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-18 15:18:51,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:51,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900788923] [2023-02-18 15:18:51,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900788923] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:18:51,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:18:51,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 15:18:51,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284262836] [2023-02-18 15:18:51,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:18:51,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 15:18:51,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:51,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 15:18:51,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 15:18:51,486 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:51,496 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2023-02-18 15:18:51,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 15:18:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-18 15:18:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:51,497 INFO L225 Difference]: With dead ends: 109 [2023-02-18 15:18:51,497 INFO L226 Difference]: Without dead ends: 78 [2023-02-18 15:18:51,497 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 [2023-02-18 15:18:51,498 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:51,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:18:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-18 15:18:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-02-18 15:18:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2467532467532467) internal successors, (96), 77 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2023-02-18 15:18:51,501 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 33 [2023-02-18 15:18:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:51,501 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2023-02-18 15:18:51,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2023-02-18 15:18:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-18 15:18:51,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:51,503 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:51,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 15:18:51,503 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1510947673, now seen corresponding path program 1 times [2023-02-18 15:18:51,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:51,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409534027] [2023-02-18 15:18:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:51,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:18:51,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:51,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409534027] [2023-02-18 15:18:51,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409534027] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:18:51,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504722924] [2023-02-18 15:18:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:51,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:51,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:18:51,550 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) [2023-02-18 15:18:51,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 15:18:51,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:51,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 15:18:51,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:18:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:18:51,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:18:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 15:18:51,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504722924] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:18:51,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:18:51,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-02-18 15:18:51,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383326007] [2023-02-18 15:18:51,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:18:51,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 15:18:51,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:51,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 15:18:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:18:51,657 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:51,671 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2023-02-18 15:18:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 15:18:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 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 33 [2023-02-18 15:18:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:51,672 INFO L225 Difference]: With dead ends: 151 [2023-02-18 15:18:51,672 INFO L226 Difference]: Without dead ends: 84 [2023-02-18 15:18:51,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-02-18 15:18:51,673 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:51,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 154 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:18:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-18 15:18:51,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-02-18 15:18:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 83 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 102 transitions. [2023-02-18 15:18:51,676 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 102 transitions. Word has length 33 [2023-02-18 15:18:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:51,676 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 102 transitions. [2023-02-18 15:18:51,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 102 transitions. [2023-02-18 15:18:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-18 15:18:51,677 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:51,677 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:51,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 15:18:51,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:51,882 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:51,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:51,883 INFO L85 PathProgramCache]: Analyzing trace with hash -664954911, now seen corresponding path program 2 times [2023-02-18 15:18:51,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:51,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477798846] [2023-02-18 15:18:51,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:51,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 15:18:51,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:51,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477798846] [2023-02-18 15:18:51,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477798846] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:18:51,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:18:51,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 15:18:51,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656474294] [2023-02-18 15:18:51,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:18:51,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 15:18:51,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:51,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 15:18:51,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 15:18:51,937 INFO L87 Difference]: Start difference. First operand 84 states and 102 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:51,970 INFO L93 Difference]: Finished difference Result 163 states and 198 transitions. [2023-02-18 15:18:51,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 15:18:51,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-18 15:18:51,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:51,971 INFO L225 Difference]: With dead ends: 163 [2023-02-18 15:18:51,971 INFO L226 Difference]: Without dead ends: 116 [2023-02-18 15:18:51,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 15:18:51,972 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:51,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 150 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:18:51,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-18 15:18:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 87. [2023-02-18 15:18:51,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2209302325581395) internal successors, (105), 86 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2023-02-18 15:18:51,975 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 39 [2023-02-18 15:18:51,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:51,975 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2023-02-18 15:18:51,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:51,975 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2023-02-18 15:18:51,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-18 15:18:51,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:51,976 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:51,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 15:18:51,976 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:51,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:51,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1636169070, now seen corresponding path program 1 times [2023-02-18 15:18:51,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:51,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727181137] [2023-02-18 15:18:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:51,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-18 15:18:52,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:52,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727181137] [2023-02-18 15:18:52,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727181137] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 15:18:52,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 15:18:52,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 15:18:52,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218824181] [2023-02-18 15:18:52,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 15:18:52,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 15:18:52,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:52,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 15:18:52,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:18:52,065 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:52,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:52,165 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2023-02-18 15:18:52,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 15:18:52,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-18 15:18:52,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:52,166 INFO L225 Difference]: With dead ends: 162 [2023-02-18 15:18:52,166 INFO L226 Difference]: Without dead ends: 124 [2023-02-18 15:18:52,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-02-18 15:18:52,167 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 112 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:52,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 282 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 15:18:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-18 15:18:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 101. [2023-02-18 15:18:52,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.24) internal successors, (124), 100 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:52,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2023-02-18 15:18:52,170 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 42 [2023-02-18 15:18:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:52,170 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2023-02-18 15:18:52,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2023-02-18 15:18:52,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-18 15:18:52,171 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:52,171 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:52,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 15:18:52,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1159200651, now seen corresponding path program 1 times [2023-02-18 15:18:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:52,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346588348] [2023-02-18 15:18:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 15:18:52,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:52,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346588348] [2023-02-18 15:18:52,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346588348] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:18:52,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32526861] [2023-02-18 15:18:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:52,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:52,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:18:52,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:18:52,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 15:18:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:52,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 15:18:52,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:18:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 15:18:52,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:18:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 15:18:52,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32526861] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:18:52,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:18:52,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2023-02-18 15:18:52,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841769571] [2023-02-18 15:18:52,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:18:52,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 15:18:52,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:52,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 15:18:52,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-18 15:18:52,354 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2023-02-18 15:18:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:52,400 INFO L93 Difference]: Finished difference Result 238 states and 292 transitions. [2023-02-18 15:18:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 15:18:52,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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 44 [2023-02-18 15:18:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:52,401 INFO L225 Difference]: With dead ends: 238 [2023-02-18 15:18:52,401 INFO L226 Difference]: Without dead ends: 175 [2023-02-18 15:18:52,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2023-02-18 15:18:52,402 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 106 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:52,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 187 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 15:18:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-02-18 15:18:52,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2023-02-18 15:18:52,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.213235294117647) internal successors, (165), 136 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 165 transitions. [2023-02-18 15:18:52,406 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 165 transitions. Word has length 44 [2023-02-18 15:18:52,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:52,406 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 165 transitions. [2023-02-18 15:18:52,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2023-02-18 15:18:52,406 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 165 transitions. [2023-02-18 15:18:52,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 15:18:52,407 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:52,407 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:52,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 15:18:52,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:52,612 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:52,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1026725283, now seen corresponding path program 2 times [2023-02-18 15:18:52,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:52,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034184025] [2023-02-18 15:18:52,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:52,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 15:18:52,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:52,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034184025] [2023-02-18 15:18:52,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034184025] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:18:52,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969889726] [2023-02-18 15:18:52,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 15:18:52,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:52,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:18:52,700 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:18:52,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 15:18:52,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 15:18:52,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 15:18:52,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-18 15:18:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:18:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 15:18:52,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:18:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 15:18:52,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969889726] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:18:52,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:18:52,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 20 [2023-02-18 15:18:52,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114648816] [2023-02-18 15:18:52,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:18:52,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 15:18:52,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:52,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 15:18:52,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-02-18 15:18:52,888 INFO L87 Difference]: Start difference. First operand 137 states and 165 transitions. Second operand has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:53,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:53,441 INFO L93 Difference]: Finished difference Result 455 states and 578 transitions. [2023-02-18 15:18:53,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-18 15:18:53,441 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-18 15:18:53,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:53,442 INFO L225 Difference]: With dead ends: 455 [2023-02-18 15:18:53,442 INFO L226 Difference]: Without dead ends: 252 [2023-02-18 15:18:53,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=341, Invalid=1381, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 15:18:53,443 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 674 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:53,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 821 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 931 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 15:18:53,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-02-18 15:18:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 159. [2023-02-18 15:18:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.2215189873417722) internal successors, (193), 158 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 193 transitions. [2023-02-18 15:18:53,448 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 193 transitions. Word has length 49 [2023-02-18 15:18:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:53,448 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 193 transitions. [2023-02-18 15:18:53,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.4) internal successors, (88), 20 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 193 transitions. [2023-02-18 15:18:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 15:18:53,449 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:53,449 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:53,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 15:18:53,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:53,655 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash 15608033, now seen corresponding path program 1 times [2023-02-18 15:18:53,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:53,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220004059] [2023-02-18 15:18:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 15:18:53,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 15:18:53,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220004059] [2023-02-18 15:18:53,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220004059] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 15:18:53,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753672304] [2023-02-18 15:18:53,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:53,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 15:18:53,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 15:18:53,737 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 15:18:53,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 15:18:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 15:18:53,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 15:18:53,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 15:18:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 15:18:53,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 15:18:53,941 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-18 15:18:53,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753672304] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 15:18:53,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 15:18:53,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-02-18 15:18:53,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201974219] [2023-02-18 15:18:53,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 15:18:53,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 15:18:53,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 15:18:53,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 15:18:53,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2023-02-18 15:18:53,943 INFO L87 Difference]: Start difference. First operand 159 states and 193 transitions. Second operand has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 15:18:54,338 INFO L93 Difference]: Finished difference Result 400 states and 484 transitions. [2023-02-18 15:18:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-18 15:18:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-18 15:18:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 15:18:54,340 INFO L225 Difference]: With dead ends: 400 [2023-02-18 15:18:54,340 INFO L226 Difference]: Without dead ends: 398 [2023-02-18 15:18:54,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1807, Unknown=0, NotChecked=0, Total=2256 [2023-02-18 15:18:54,341 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 585 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 15:18:54,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 533 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 15:18:54,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-02-18 15:18:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 181. [2023-02-18 15:18:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.2555555555555555) internal successors, (226), 180 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 226 transitions. [2023-02-18 15:18:54,347 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 226 transitions. Word has length 49 [2023-02-18 15:18:54,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 15:18:54,347 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 226 transitions. [2023-02-18 15:18:54,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.454545454545454) internal successors, (98), 22 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 15:18:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 226 transitions. [2023-02-18 15:18:54,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 15:18:54,348 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 15:18:54,348 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:54,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 15:18:54,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 15:18:54,554 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 15:18:54,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 15:18:54,555 INFO L85 PathProgramCache]: Analyzing trace with hash 17455075, now seen corresponding path program 1 times [2023-02-18 15:18:54,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 15:18:54,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629808969] [2023-02-18 15:18:54,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 15:18:54,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 15:18:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 15:18:54,588 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 15:18:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 15:18:54,632 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 15:18:54,632 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-18 15:18:54,633 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 15:18:54,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-18 15:18:54,635 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 15:18:54,637 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 15:18:54,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 03:18:54 BoogieIcfgContainer [2023-02-18 15:18:54,688 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 15:18:54,689 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 15:18:54,689 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 15:18:54,689 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 15:18:54,689 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 03:18:49" (3/4) ... [2023-02-18 15:18:54,690 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-18 15:18:54,731 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 15:18:54,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 15:18:54,732 INFO L158 Benchmark]: Toolchain (without parser) took 6232.70ms. Allocated memory was 213.9MB in the beginning and 268.4MB in the end (delta: 54.5MB). Free memory was 168.2MB in the beginning and 145.0MB in the end (delta: 23.2MB). Peak memory consumption was 80.1MB. Max. memory is 16.1GB. [2023-02-18 15:18:54,732 INFO L158 Benchmark]: CDTParser took 0.61ms. Allocated memory is still 134.2MB. Free memory is still 77.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 15:18:54,732 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.22ms. Allocated memory is still 213.9MB. Free memory was 168.2MB in the beginning and 157.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 15:18:54,732 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.26ms. Allocated memory is still 213.9MB. Free memory was 157.0MB in the beginning and 155.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 15:18:54,733 INFO L158 Benchmark]: Boogie Preprocessor took 22.31ms. Allocated memory is still 213.9MB. Free memory was 155.0MB in the beginning and 153.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 15:18:54,733 INFO L158 Benchmark]: RCFGBuilder took 276.71ms. Allocated memory is still 213.9MB. Free memory was 152.9MB in the beginning and 139.5MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-02-18 15:18:54,734 INFO L158 Benchmark]: TraceAbstraction took 5665.22ms. Allocated memory was 213.9MB in the beginning and 268.4MB in the end (delta: 54.5MB). Free memory was 138.9MB in the beginning and 148.1MB in the end (delta: -9.3MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. [2023-02-18 15:18:54,734 INFO L158 Benchmark]: Witness Printer took 42.68ms. Allocated memory is still 268.4MB. Free memory was 148.1MB in the beginning and 145.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-02-18 15:18:54,736 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61ms. Allocated memory is still 134.2MB. Free memory is still 77.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 195.22ms. Allocated memory is still 213.9MB. Free memory was 168.2MB in the beginning and 157.0MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.26ms. Allocated memory is still 213.9MB. Free memory was 157.0MB in the beginning and 155.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.31ms. Allocated memory is still 213.9MB. Free memory was 155.0MB in the beginning and 153.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 276.71ms. Allocated memory is still 213.9MB. Free memory was 152.9MB in the beginning and 139.5MB in the end (delta: 13.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 5665.22ms. Allocated memory was 213.9MB in the beginning and 268.4MB in the end (delta: 54.5MB). Free memory was 138.9MB in the beginning and 148.1MB in the end (delta: -9.3MB). Peak memory consumption was 46.6MB. Max. memory is 16.1GB. * Witness Printer took 42.68ms. Allocated memory is still 268.4MB. Free memory was 148.1MB in the beginning and 145.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L86] char A [2 + 2 + 4 +1]; [L87] int i = 0; VAL [A={10:0}, i=0] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=1] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=2] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=3] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=4] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=5] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=6] [L87] COND TRUE i<2 + 2 + 4 -1 [L88] A[i] = __VERIFIER_nondet_char() [L87] i++ VAL [A={10:0}, i=7] [L87] COND FALSE !(i<2 + 2 + 4 -1) VAL [A={10:0}, i=7] [L90] A[2 + 2 + 4] = 0 [L91] CALL parse_expression_list (A) [L60] int start=0, i=-1, j=-1; [L61] char str2[2]; VAL [i=-1, j=-1, start=0, str={10:0}, str={10:0}, str2={7:0}] [L62] COND FALSE !(!str) VAL [i=-1, j=-1, start=0, str={10:0}, str={10:0}, str2={7:0}] [L64] i++ [L65] str[i] [L66] case 0: VAL [i=0, j=-1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=-8] [L81] EXPR str[i] VAL [i=0, j=-1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=-8] [L81] COND TRUE str[i] != 0 [L64] i++ [L65] str[i] [L66] case 0: VAL [i=1, j=-1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=-9] [L81] EXPR str[i] VAL [i=1, j=-1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=-9] [L81] COND TRUE str[i] != 0 [L64] i++ [L65] str[i] [L66] case 0: VAL [i=2, j=-1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=0] [L67] EXPR str[start] [L67] (str[start] == ' ') || (str[start] == '\t') [L67] EXPR str[start] [L67] (str[start] == ' ') || (str[start] == '\t') VAL [(str[start] == ' ') || (str[start] == '\t')=0, i=2, j=-1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=0, str[start]=-8, str[start]=-8] [L67] COND FALSE !((str[start] == ' ') || (str[start] == '\t')) [L68] EXPR str[start] VAL [i=2, j=-1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=0, str[start]=-8] [L68] COND FALSE !(str[start] == '"') [L69] j = i-1 VAL [i=2, j=1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=0] [L70] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) [L70] EXPR str[j] [L70] EXPR (str[j] == ' ') || (str[j] == '\t') [L70] EXPR str[j] [L70] EXPR (str[j] == ' ') || (str[j] == '\t') VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=1, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=0, str[j]=-9, str[j]=-9] [L70] (0 < j) && ((str[j] == ' ') || (str[j] == '\t')) VAL [(0 < j) && ((str[j] == ' ') || (str[j] == '\t'))=0, (str[j] == ' ') || (str[j] == '\t')=0, i=2, j=1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=0, str[j]=-9, str[j]=-9] [L70] COND FALSE !((0 < j) && ((str[j] == ' ') || (str[j] == '\t'))) [L71] (0 < j) && (str[j] == '"') [L71] EXPR str[j] [L71] (0 < j) && (str[j] == '"') VAL [(0 < j) && (str[j] == '"')=0, i=2, j=1, start=0, str={10:0}, str={10:0}, str2={7:0}, str[i]=0, str[j]=-9] [L71] COND FALSE !((0 < j) && (str[j] == '"')) [L72] COND TRUE start<=j [L73] CALL r_strncpy(str2, str+start, j-start+1) [L42] return strncpy(dest,src,n); [L73] RET r_strncpy(str2, str+start, j-start+1) [L74] CALL __VERIFIER_assert(j - start + 1 < 2) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.6s, OverallIterations: 14, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1703 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1703 mSDsluCounter, 2928 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2340 mSDsCounter, 138 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2107 IncrementalHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 138 mSolverCounterUnsat, 588 mSDtfsCounter, 2107 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 619 GetRequests, 440 SyntacticMatches, 19 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=181occurred in iteration=13, InterpolantAutomatonStates: 136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 480 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 775 NumberOfCodeBlocks, 767 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 900 ConstructedInterpolants, 0 QuantifiedInterpolants, 2506 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1339 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 26 InterpolantComputations, 8 PerfectInterpolantSequences, 591/720 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-02-18 15:18:54,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE