./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/string_concat-noarr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/string_concat-noarr.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 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:38:08,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:38:08,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:38:08,104 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:38:08,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:38:08,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:38:08,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:38:08,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:38:08,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:38:08,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:38:08,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:38:08,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:38:08,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:38:08,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:38:08,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:38:08,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:38:08,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:38:08,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:38:08,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:38:08,128 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:38:08,129 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:38:08,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:38:08,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:38:08,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:38:08,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:38:08,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:38:08,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:38:08,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:38:08,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:38:08,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:38:08,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:38:08,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:38:08,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:38:08,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:38:08,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:38:08,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:38:08,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:38:08,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:38:08,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:38:08,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:38:08,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:38:08,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:38:08,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:38:08,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:38:08,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:38:08,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:38:08,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:38:08,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:38:08,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:38:08,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:38:08,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:38:08,168 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:38:08,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:38:08,169 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:38:08,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:38:08,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:38:08,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:38:08,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:38:08,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:38:08,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:38:08,170 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:38:08,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:38:08,170 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:38:08,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:38:08,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:38:08,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:38:08,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:38:08,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:38:08,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:38:08,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:38:08,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:38:08,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:38:08,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:38:08,172 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:38:08,172 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:38:08,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:38:08,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 30a4b942034eaa47a8fcc8fdf4549d1d63a9a60d59b585da2a353c9626604750 [2022-07-13 15:38:08,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:38:08,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:38:08,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:38:08,392 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:38:08,392 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:38:08,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2022-07-13 15:38:08,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1845b63d/46abf509cd1d49eb96016a85ea130fd2/FLAG41a207bba [2022-07-13 15:38:08,789 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:38:08,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/string_concat-noarr.i [2022-07-13 15:38:08,795 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1845b63d/46abf509cd1d49eb96016a85ea130fd2/FLAG41a207bba [2022-07-13 15:38:08,809 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1845b63d/46abf509cd1d49eb96016a85ea130fd2 [2022-07-13 15:38:08,811 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:38:08,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:38:08,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:38:08,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:38:08,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:38:08,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:08,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53df7e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08, skipping insertion in model container [2022-07-13 15:38:08,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:08,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:38:08,831 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:38:08,935 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2022-07-13 15:38:08,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:38:08,955 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:38:08,965 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/string_concat-noarr.i[893,906] [2022-07-13 15:38:08,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:38:08,977 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:38:08,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08 WrapperNode [2022-07-13 15:38:08,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:38:08,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:38:08,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:38:08,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:38:08,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:08,990 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:09,002 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-07-13 15:38:09,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:38:09,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:38:09,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:38:09,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:38:09,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:09,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:09,010 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:09,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:09,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:09,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:09,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:09,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:38:09,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:38:09,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:38:09,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:38:09,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (1/1) ... [2022-07-13 15:38:09,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:38:09,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:09,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 15:38:09,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 15:38:09,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:38:09,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:38:09,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:38:09,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:38:09,114 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:38:09,116 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:38:09,243 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:38:09,247 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:38:09,248 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 15:38:09,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:38:09 BoogieIcfgContainer [2022-07-13 15:38:09,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:38:09,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:38:09,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:38:09,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:38:09,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:38:08" (1/3) ... [2022-07-13 15:38:09,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f76a95f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:38:09, skipping insertion in model container [2022-07-13 15:38:09,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:38:08" (2/3) ... [2022-07-13 15:38:09,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f76a95f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:38:09, skipping insertion in model container [2022-07-13 15:38:09,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:38:09" (3/3) ... [2022-07-13 15:38:09,267 INFO L111 eAbstractionObserver]: Analyzing ICFG string_concat-noarr.i [2022-07-13 15:38:09,277 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:38:09,277 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:38:09,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:38:09,309 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@224921a7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44177e98 [2022-07-13 15:38:09,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:38:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:09,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-13 15:38:09,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:09,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:09,317 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:09,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1270421808, now seen corresponding path program 1 times [2022-07-13 15:38:09,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:09,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352363999] [2022-07-13 15:38:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:09,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:09,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:09,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352363999] [2022-07-13 15:38:09,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352363999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:38:09,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:38:09,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 15:38:09,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672753382] [2022-07-13 15:38:09,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:38:09,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 15:38:09,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:09,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 15:38:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:38:09,461 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 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 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:09,471 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2022-07-13 15:38:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 15:38:09,472 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-07-13 15:38:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:09,477 INFO L225 Difference]: With dead ends: 29 [2022-07-13 15:38:09,478 INFO L226 Difference]: Without dead ends: 12 [2022-07-13 15:38:09,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 15:38:09,485 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:09,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:38:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-13 15:38:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-13 15:38:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:09,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-07-13 15:38:09,506 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2022-07-13 15:38:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:09,506 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-07-13 15:38:09,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-07-13 15:38:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 15:38:09,508 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:09,508 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:09,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:38:09,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:09,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:09,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1947968043, now seen corresponding path program 1 times [2022-07-13 15:38:09,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:09,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502035976] [2022-07-13 15:38:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:09,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502035976] [2022-07-13 15:38:09,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502035976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:38:09,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:38:09,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 15:38:09,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733282713] [2022-07-13 15:38:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:38:09,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 15:38:09,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:09,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 15:38:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 15:38:09,575 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:09,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:09,623 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2022-07-13 15:38:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 15:38:09,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2022-07-13 15:38:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:09,627 INFO L225 Difference]: With dead ends: 21 [2022-07-13 15:38:09,627 INFO L226 Difference]: Without dead ends: 17 [2022-07-13 15:38:09,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 15:38:09,628 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:09,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 18 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:38:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-13 15:38:09,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2022-07-13 15:38:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-07-13 15:38:09,633 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-07-13 15:38:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:09,634 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-07-13 15:38:09,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-07-13 15:38:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 15:38:09,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:09,635 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:09,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 15:38:09,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:09,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:09,636 INFO L85 PathProgramCache]: Analyzing trace with hash 653313584, now seen corresponding path program 1 times [2022-07-13 15:38:09,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:09,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613463637] [2022-07-13 15:38:09,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:09,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:09,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:09,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613463637] [2022-07-13 15:38:09,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613463637] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:09,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657346145] [2022-07-13 15:38:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:09,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:09,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:09,681 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:09,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:38:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:09,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 15:38:09,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:09,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:09,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657346145] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:09,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:09,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-13 15:38:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189798367] [2022-07-13 15:38:09,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:09,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 15:38:09,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 15:38:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:38:09,795 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:09,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:09,848 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2022-07-13 15:38:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 15:38:09,849 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-13 15:38:09,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:09,849 INFO L225 Difference]: With dead ends: 44 [2022-07-13 15:38:09,849 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 15:38:09,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-07-13 15:38:09,851 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:09,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 32 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:38:09,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 15:38:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2022-07-13 15:38:09,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2022-07-13 15:38:09,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-13 15:38:09,854 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2022-07-13 15:38:09,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:09,855 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-13 15:38:09,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-13 15:38:09,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-13 15:38:09,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:09,856 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:09,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:10,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:10,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1676362047, now seen corresponding path program 2 times [2022-07-13 15:38:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:10,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59362385] [2022-07-13 15:38:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:10,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:10,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:10,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59362385] [2022-07-13 15:38:10,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59362385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:10,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105246491] [2022-07-13 15:38:10,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:38:10,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:10,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:10,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:10,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:38:10,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:38:10,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:10,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 15:38:10,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:10,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:10,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105246491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:10,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:10,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-07-13 15:38:10,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132807821] [2022-07-13 15:38:10,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:10,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-13 15:38:10,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:10,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-13 15:38:10,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-07-13 15:38:10,335 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2022-07-13 15:38:10,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:10,445 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2022-07-13 15:38:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 15:38:10,446 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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 19 [2022-07-13 15:38:10,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:10,448 INFO L225 Difference]: With dead ends: 88 [2022-07-13 15:38:10,448 INFO L226 Difference]: Without dead ends: 74 [2022-07-13 15:38:10,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2022-07-13 15:38:10,449 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 92 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:10,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 41 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:38:10,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-13 15:38:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 47. [2022-07-13 15:38:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-07-13 15:38:10,454 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 19 [2022-07-13 15:38:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:10,455 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-07-13 15:38:10,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 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) [2022-07-13 15:38:10,455 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-07-13 15:38:10,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 15:38:10,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:10,456 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:10,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 15:38:10,672 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1240264099, now seen corresponding path program 3 times [2022-07-13 15:38:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:10,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88150100] [2022-07-13 15:38:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:10,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:10,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88150100] [2022-07-13 15:38:10,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88150100] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:10,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299001004] [2022-07-13 15:38:10,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 15:38:10,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:10,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:10,815 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:10,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 15:38:10,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-13 15:38:10,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:10,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 15:38:10,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:10,933 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:10,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:11,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299001004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:11,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:11,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-07-13 15:38:11,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471624431] [2022-07-13 15:38:11,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:11,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 15:38:11,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:11,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 15:38:11,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=397, Unknown=0, NotChecked=0, Total=702 [2022-07-13 15:38:11,126 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:11,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:11,413 INFO L93 Difference]: Finished difference Result 208 states and 242 transitions. [2022-07-13 15:38:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 15:38:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-13 15:38:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:11,415 INFO L225 Difference]: With dead ends: 208 [2022-07-13 15:38:11,415 INFO L226 Difference]: Without dead ends: 182 [2022-07-13 15:38:11,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=497, Invalid=985, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 15:38:11,417 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 193 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:11,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 78 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 15:38:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-13 15:38:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 89. [2022-07-13 15:38:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2022-07-13 15:38:11,423 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 31 [2022-07-13 15:38:11,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:11,424 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2022-07-13 15:38:11,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:11,424 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2022-07-13 15:38:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 15:38:11,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:11,425 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:11,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:11,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:11,642 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash 351142503, now seen corresponding path program 4 times [2022-07-13 15:38:11,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:11,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185414689] [2022-07-13 15:38:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:11,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:12,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:12,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185414689] [2022-07-13 15:38:12,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185414689] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:12,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587493163] [2022-07-13 15:38:12,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 15:38:12,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:12,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:12,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:12,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 15:38:12,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 15:38:12,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:12,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 15:38:12,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:12,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:12,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587493163] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:12,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:12,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2022-07-13 15:38:12,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337312030] [2022-07-13 15:38:12,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:12,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-13 15:38:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-13 15:38:12,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1181, Invalid=1369, Unknown=0, NotChecked=0, Total=2550 [2022-07-13 15:38:12,794 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:13,497 INFO L93 Difference]: Finished difference Result 556 states and 626 transitions. [2022-07-13 15:38:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-13 15:38:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 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 55 [2022-07-13 15:38:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:13,500 INFO L225 Difference]: With dead ends: 556 [2022-07-13 15:38:13,500 INFO L226 Difference]: Without dead ends: 506 [2022-07-13 15:38:13,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1853, Invalid=3697, Unknown=0, NotChecked=0, Total=5550 [2022-07-13 15:38:13,502 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 709 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:13,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 116 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:38:13,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-13 15:38:13,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 173. [2022-07-13 15:38:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.1453488372093024) internal successors, (197), 172 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 197 transitions. [2022-07-13 15:38:13,512 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 197 transitions. Word has length 55 [2022-07-13 15:38:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:13,512 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 197 transitions. [2022-07-13 15:38:13,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 197 transitions. [2022-07-13 15:38:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 15:38:13,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:13,515 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:13,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 15:38:13,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:13,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:13,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash -229570577, now seen corresponding path program 5 times [2022-07-13 15:38:13,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:13,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117400827] [2022-07-13 15:38:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:13,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:14,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:14,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117400827] [2022-07-13 15:38:14,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117400827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:14,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890967148] [2022-07-13 15:38:14,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 15:38:14,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:14,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:14,559 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 15:38:14,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 15:38:14,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-07-13 15:38:14,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:14,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-13 15:38:14,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:14,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:16,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890967148] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:16,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:16,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-07-13 15:38:16,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529028514] [2022-07-13 15:38:16,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:16,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-13 15:38:16,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:16,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-13 15:38:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4661, Invalid=5041, Unknown=0, NotChecked=0, Total=9702 [2022-07-13 15:38:16,859 INFO L87 Difference]: Start difference. First operand 173 states and 197 transitions. Second operand has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:19,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:19,458 INFO L93 Difference]: Finished difference Result 1684 states and 1826 transitions. [2022-07-13 15:38:19,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-07-13 15:38:19,459 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 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 103 [2022-07-13 15:38:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:19,462 INFO L225 Difference]: With dead ends: 1684 [2022-07-13 15:38:19,462 INFO L226 Difference]: Without dead ends: 1586 [2022-07-13 15:38:19,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=7157, Invalid=14305, Unknown=0, NotChecked=0, Total=21462 [2022-07-13 15:38:19,467 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1233 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:19,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 227 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 15:38:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2022-07-13 15:38:19,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 341. [2022-07-13 15:38:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.1441176470588235) internal successors, (389), 340 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 389 transitions. [2022-07-13 15:38:19,480 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 389 transitions. Word has length 103 [2022-07-13 15:38:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:19,481 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 389 transitions. [2022-07-13 15:38:19,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.121212121212121) internal successors, (210), 99 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 389 transitions. [2022-07-13 15:38:19,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-13 15:38:19,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:19,483 INFO L195 NwaCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:19,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 15:38:19,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:19,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:19,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:19,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1249213697, now seen corresponding path program 6 times [2022-07-13 15:38:19,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:19,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314978230] [2022-07-13 15:38:19,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:19,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:22,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:22,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314978230] [2022-07-13 15:38:22,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314978230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:22,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176223607] [2022-07-13 15:38:22,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 15:38:22,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:22,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:22,419 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) [2022-07-13 15:38:22,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 15:38:22,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-07-13 15:38:22,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:38:22,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-13 15:38:22,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:38:22,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:22,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:38:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8930 backedges. 0 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:30,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176223607] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:38:30,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:38:30,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 195 [2022-07-13 15:38:30,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143156010] [2022-07-13 15:38:30,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:38:30,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-07-13 15:38:30,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:38:30,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-07-13 15:38:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18533, Invalid=19297, Unknown=0, NotChecked=0, Total=37830 [2022-07-13 15:38:30,318 INFO L87 Difference]: Start difference. First operand 341 states and 389 transitions. Second operand has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:48,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:38:48,398 INFO L93 Difference]: Finished difference Result 5668 states and 5954 transitions. [2022-07-13 15:38:48,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2022-07-13 15:38:48,398 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 states have internal predecessors, (402), 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 199 [2022-07-13 15:38:48,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:38:48,409 INFO L225 Difference]: With dead ends: 5668 [2022-07-13 15:38:48,409 INFO L226 Difference]: Without dead ends: 5474 [2022-07-13 15:38:48,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9784 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=28133, Invalid=56257, Unknown=0, NotChecked=0, Total=84390 [2022-07-13 15:38:48,414 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3445 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 1704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1704 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 15:38:48,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 408 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1704 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 15:38:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2022-07-13 15:38:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 677. [2022-07-13 15:38:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.143491124260355) internal successors, (773), 676 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 773 transitions. [2022-07-13 15:38:48,437 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 773 transitions. Word has length 199 [2022-07-13 15:38:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:38:48,438 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 773 transitions. [2022-07-13 15:38:48,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 2.0615384615384613) internal successors, (402), 195 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:38:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 773 transitions. [2022-07-13 15:38:48,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-07-13 15:38:48,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:38:48,445 INFO L195 NwaCegarLoop]: trace histogram [191, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:38:48,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-13 15:38:48,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:48,660 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:38:48,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:38:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1430993183, now seen corresponding path program 7 times [2022-07-13 15:38:48,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:38:48,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074991639] [2022-07-13 15:38:48,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:38:48,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:38:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 0 proven. 36290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:38:58,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:38:58,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074991639] [2022-07-13 15:38:58,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074991639] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:38:58,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935914228] [2022-07-13 15:38:58,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 15:38:58,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:38:58,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:38:58,878 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) [2022-07-13 15:38:58,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 15:38:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:38:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 1561 conjuncts, 192 conjunts are in the unsatisfiable core [2022-07-13 15:38:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36290 backedges. 36290 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:19,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 15:39:19,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935914228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:39:19,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 15:39:19,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [194] total 385 [2022-07-13 15:39:19,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945967004] [2022-07-13 15:39:19,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:39:19,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-07-13 15:39:19,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:19,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-07-13 15:39:19,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37057, Invalid=110783, Unknown=0, NotChecked=0, Total=147840 [2022-07-13 15:39:19,278 INFO L87 Difference]: Start difference. First operand 677 states and 773 transitions. Second operand has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:22,207 INFO L93 Difference]: Finished difference Result 27957 states and 28143 transitions. [2022-07-13 15:39:22,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-07-13 15:39:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 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 391 [2022-07-13 15:39:22,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:22,211 INFO L225 Difference]: With dead ends: 27957 [2022-07-13 15:39:22,211 INFO L226 Difference]: Without dead ends: 1200 [2022-07-13 15:39:22,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36480 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=37057, Invalid=110783, Unknown=0, NotChecked=0, Total=147840 [2022-07-13 15:39:22,230 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 656 mSDsluCounter, 1099 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:22,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [656 Valid, 1300 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 15:39:22,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-07-13 15:39:22,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1184. [2022-07-13 15:39:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 1183 states have (on average 1.007607776838546) internal successors, (1192), 1183 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1192 transitions. [2022-07-13 15:39:22,264 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1192 transitions. Word has length 391 [2022-07-13 15:39:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:22,265 INFO L495 AbstractCegarLoop]: Abstraction has 1184 states and 1192 transitions. [2022-07-13 15:39:22,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 193 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1192 transitions. [2022-07-13 15:39:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2022-07-13 15:39:22,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:39:22,269 INFO L195 NwaCegarLoop]: trace histogram [100, 99, 92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:39:22,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:22,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:22,484 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:39:22,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:39:22,484 INFO L85 PathProgramCache]: Analyzing trace with hash -548522195, now seen corresponding path program 1 times [2022-07-13 15:39:22,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:39:22,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900694395] [2022-07-13 15:39:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:22,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:39:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:32,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:39:32,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900694395] [2022-07-13 15:39:32,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900694395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:39:32,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707677702] [2022-07-13 15:39:32,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:39:32,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:39:32,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:39:32,457 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) [2022-07-13 15:39:32,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 15:39:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:39:32,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 194 conjunts are in the unsatisfiable core [2022-07-13 15:39:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:39:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:33,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:39:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 18272 backedges. 0 proven. 18272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:39:34,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707677702] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:39:34,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:39:34,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 205 [2022-07-13 15:39:34,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485111809] [2022-07-13 15:39:34,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:39:34,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 205 states [2022-07-13 15:39:34,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:39:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 205 interpolants. [2022-07-13 15:39:34,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20508, Invalid=21312, Unknown=0, NotChecked=0, Total=41820 [2022-07-13 15:39:34,625 INFO L87 Difference]: Start difference. First operand 1184 states and 1192 transitions. Second operand has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:39:42,230 INFO L93 Difference]: Finished difference Result 2335 states and 2470 transitions. [2022-07-13 15:39:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-07-13 15:39:42,231 INFO L78 Accepts]: Start accepts. Automaton has has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 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 391 [2022-07-13 15:39:42,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:39:42,232 INFO L225 Difference]: With dead ends: 2335 [2022-07-13 15:39:42,232 INFO L226 Difference]: Without dead ends: 0 [2022-07-13 15:39:42,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 769 SyntacticMatches, 2 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=20634, Invalid=24948, Unknown=0, NotChecked=0, Total=45582 [2022-07-13 15:39:42,235 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2175 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 2043 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2175 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 2524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2043 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 15:39:42,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2175 Valid, 329 Invalid, 2524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2043 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 15:39:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-13 15:39:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-13 15:39:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-13 15:39:42,236 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 391 [2022-07-13 15:39:42,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:39:42,236 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-13 15:39:42,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 205 states, 205 states have (on average 2.131707317073171) internal successors, (437), 205 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:39:42,236 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-13 15:39:42,236 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-13 15:39:42,238 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 15:39:42,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 15:39:42,439 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,SelfDestructingSolverStorable9 [2022-07-13 15:39:42,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-13 15:39:42,446 INFO L899 garLoopResultBuilder]: For program point L35-2(lines 34 38) no Hoare annotation was computed. [2022-07-13 15:39:42,446 INFO L899 garLoopResultBuilder]: For program point L35-3(lines 24 42) no Hoare annotation was computed. [2022-07-13 15:39:42,446 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-07-13 15:39:42,446 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-13 15:39:42,446 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-13 15:39:42,446 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-13 15:39:42,447 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-07-13 15:39:42,447 INFO L902 garLoopResultBuilder]: At program point L41(lines 24 42) the Hoare annotation is: true [2022-07-13 15:39:42,447 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-13 15:39:42,447 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 31) no Hoare annotation was computed. [2022-07-13 15:39:42,447 INFO L899 garLoopResultBuilder]: For program point L29-2(lines 28 31) no Hoare annotation was computed. [2022-07-13 15:39:42,447 INFO L899 garLoopResultBuilder]: For program point L29-3(lines 24 42) no Hoare annotation was computed. [2022-07-13 15:39:42,447 INFO L899 garLoopResultBuilder]: For program point L26(lines 26 27) no Hoare annotation was computed. [2022-07-13 15:39:42,447 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-07-13 15:39:42,447 INFO L902 garLoopResultBuilder]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2022-07-13 15:39:42,447 INFO L902 garLoopResultBuilder]: At program point L39(lines 24 42) the Hoare annotation is: true [2022-07-13 15:39:42,447 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 38) no Hoare annotation was computed. [2022-07-13 15:39:42,449 INFO L356 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1] [2022-07-13 15:39:42,450 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 15:39:42,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 03:39:42 BoogieIcfgContainer [2022-07-13 15:39:42,460 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 15:39:42,461 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 15:39:42,461 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 15:39:42,461 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 15:39:42,461 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:38:09" (3/4) ... [2022-07-13 15:39:42,463 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-13 15:39:42,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-07-13 15:39:42,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-07-13 15:39:42,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-13 15:39:42,469 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-13 15:39:42,489 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 15:39:42,490 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 15:39:42,491 INFO L158 Benchmark]: Toolchain (without parser) took 93679.07ms. Allocated memory was 123.7MB in the beginning and 914.4MB in the end (delta: 790.6MB). Free memory was 91.2MB in the beginning and 505.7MB in the end (delta: -414.6MB). Peak memory consumption was 375.4MB. Max. memory is 16.1GB. [2022-07-13 15:39:42,491 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory was 45.1MB in the beginning and 45.0MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 15:39:42,491 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.79ms. Allocated memory is still 123.7MB. Free memory was 90.9MB in the beginning and 99.7MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 15:39:42,492 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.05ms. Allocated memory is still 123.7MB. Free memory was 99.6MB in the beginning and 98.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:39:42,492 INFO L158 Benchmark]: Boogie Preprocessor took 17.90ms. Allocated memory is still 123.7MB. Free memory was 98.1MB in the beginning and 97.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:39:42,492 INFO L158 Benchmark]: RCFGBuilder took 226.52ms. Allocated memory is still 123.7MB. Free memory was 97.0MB in the beginning and 88.1MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 15:39:42,493 INFO L158 Benchmark]: TraceAbstraction took 93210.48ms. Allocated memory was 123.7MB in the beginning and 914.4MB in the end (delta: 790.6MB). Free memory was 87.3MB in the beginning and 508.9MB in the end (delta: -421.6MB). Peak memory consumption was 371.9MB. Max. memory is 16.1GB. [2022-07-13 15:39:42,493 INFO L158 Benchmark]: Witness Printer took 29.74ms. Allocated memory is still 914.4MB. Free memory was 508.9MB in the beginning and 505.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:39:42,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory was 45.1MB in the beginning and 45.0MB in the end (delta: 70.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.79ms. Allocated memory is still 123.7MB. Free memory was 90.9MB in the beginning and 99.7MB in the end (delta: -8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.05ms. Allocated memory is still 123.7MB. Free memory was 99.6MB in the beginning and 98.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.90ms. Allocated memory is still 123.7MB. Free memory was 98.1MB in the beginning and 97.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 226.52ms. Allocated memory is still 123.7MB. Free memory was 97.0MB in the beginning and 88.1MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 93210.48ms. Allocated memory was 123.7MB in the beginning and 914.4MB in the end (delta: 790.6MB). Free memory was 87.3MB in the beginning and 508.9MB in the end (delta: -421.6MB). Peak memory consumption was 371.9MB. Max. memory is 16.1GB. * Witness Printer took 29.74ms. Allocated memory is still 914.4MB. Free memory was 508.9MB in the beginning and 505.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 93.2s, OverallIterations: 10, TraceHistogramMax: 191, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 32.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8520 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8520 mSDsluCounter, 2569 SdHoareTripleChecker+Invalid, 2.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2294 mSDsCounter, 4881 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3510 IncrementalHoareTripleChecker+Invalid, 8391 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4881 mSolverCounterUnsat, 275 mSDtfsCounter, 3510 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2792 GetRequests, 1613 SyntacticMatches, 8 SemanticMatches, 1171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50906 ImplicationChecksByTransitivity, 59.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1184occurred in iteration=9, InterpolantAutomatonStates: 977, 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, 10 MinimizatonAttempts, 6524 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 6 NumberOfFragments, 3 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 57.2s InterpolantComputationTime, 2424 NumberOfCodeBlocks, 2424 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 3210 ConstructedInterpolants, 0 QuantifiedInterpolants, 9471 SizeOfPredicates, 14 NumberOfNonLiveVariables, 4602 ConjunctsInSsa, 587 ConjunctsInUnsatCore, 25 InterpolantComputations, 3 PerfectInterpolantSequences, 36290/162586 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-07-13 15:39:42,547 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 Result: TRUE