./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy1_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/array-examples/standard_copy1_ground-2.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 1970a9a8aaeda89e1214c4bedc05560d9ae947bac2f3f8ce77018b7acf727f81 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 08:54:32,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 08:54:32,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 08:54:32,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 08:54:32,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 08:54:32,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 08:54:32,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 08:54:32,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 08:54:32,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 08:54:32,853 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 08:54:32,854 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 08:54:32,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 08:54:32,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 08:54:32,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 08:54:32,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 08:54:32,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 08:54:32,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 08:54:32,865 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 08:54:32,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 08:54:32,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 08:54:32,873 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 08:54:32,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 08:54:32,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 08:54:32,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 08:54:32,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 08:54:32,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 08:54:32,885 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 08:54:32,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 08:54:32,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 08:54:32,887 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 08:54:32,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 08:54:32,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 08:54:32,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 08:54:32,890 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 08:54:32,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 08:54:32,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 08:54:32,893 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 08:54:32,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 08:54:32,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 08:54:32,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 08:54:32,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 08:54:32,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 08:54:32,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 08:54:32,925 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 08:54:32,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 08:54:32,926 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 08:54:32,926 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 08:54:32,927 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 08:54:32,927 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 08:54:32,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 08:54:32,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 08:54:32,928 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 08:54:32,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 08:54:32,930 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 08:54:32,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 08:54:32,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 08:54:32,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 08:54:32,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 08:54:32,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 08:54:32,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 08:54:32,931 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 08:54:32,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 08:54:32,931 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 08:54:32,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 08:54:32,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 08:54:32,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 08:54:32,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 08:54:32,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:54:32,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 08:54:32,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 08:54:32,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 08:54:32,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 08:54:32,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 08:54:32,934 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 08:54:32,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 08:54:32,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 08:54:32,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1970a9a8aaeda89e1214c4bedc05560d9ae947bac2f3f8ce77018b7acf727f81 [2022-07-19 08:54:33,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 08:54:33,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 08:54:33,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 08:54:33,252 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 08:54:33,255 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 08:54:33,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy1_ground-2.i [2022-07-19 08:54:33,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354039891/2bafc809622e4d95bc91b301567fc209/FLAG6789e5b1a [2022-07-19 08:54:33,705 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 08:54:33,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy1_ground-2.i [2022-07-19 08:54:33,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354039891/2bafc809622e4d95bc91b301567fc209/FLAG6789e5b1a [2022-07-19 08:54:34,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/354039891/2bafc809622e4d95bc91b301567fc209 [2022-07-19 08:54:34,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 08:54:34,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 08:54:34,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 08:54:34,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 08:54:34,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 08:54:34,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b23b96d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34, skipping insertion in model container [2022-07-19 08:54:34,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 08:54:34,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 08:54:34,302 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/array-examples/standard_copy1_ground-2.i[816,829] [2022-07-19 08:54:34,319 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:54:34,327 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 08:54:34,338 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/array-examples/standard_copy1_ground-2.i[816,829] [2022-07-19 08:54:34,344 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 08:54:34,355 INFO L208 MainTranslator]: Completed translation [2022-07-19 08:54:34,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34 WrapperNode [2022-07-19 08:54:34,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 08:54:34,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 08:54:34,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 08:54:34,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 08:54:34,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,386 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-07-19 08:54:34,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 08:54:34,387 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 08:54:34,387 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 08:54:34,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 08:54:34,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,401 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,407 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 08:54:34,408 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 08:54:34,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 08:54:34,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 08:54:34,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (1/1) ... [2022-07-19 08:54:34,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 08:54:34,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:34,441 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) [2022-07-19 08:54:34,443 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 [2022-07-19 08:54:34,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 08:54:34,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 08:54:34,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 08:54:34,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 08:54:34,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 08:54:34,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 08:54:34,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 08:54:34,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 08:54:34,532 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 08:54:34,534 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 08:54:34,624 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 08:54:34,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 08:54:34,630 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 08:54:34,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:54:34 BoogieIcfgContainer [2022-07-19 08:54:34,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 08:54:34,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 08:54:34,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 08:54:34,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 08:54:34,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:54:34" (1/3) ... [2022-07-19 08:54:34,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3040bb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:54:34, skipping insertion in model container [2022-07-19 08:54:34,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:54:34" (2/3) ... [2022-07-19 08:54:34,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3040bb89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:54:34, skipping insertion in model container [2022-07-19 08:54:34,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:54:34" (3/3) ... [2022-07-19 08:54:34,640 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-2.i [2022-07-19 08:54:34,653 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 08:54:34,654 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 08:54:34,696 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 08:54:34,702 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@401118c0, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5285c86e [2022-07-19 08:54:34,702 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 08:54:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) [2022-07-19 08:54:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 08:54:34,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:34,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:34,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:34,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2022-07-19 08:54:34,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:34,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401432276] [2022-07-19 08:54:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:34,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:54:34,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:34,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401432276] [2022-07-19 08:54:34,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401432276] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:54:34,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 08:54:34,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 08:54:34,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56930915] [2022-07-19 08:54:34,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:54:34,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:54:34,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:34,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:54:34,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 08:54:34,887 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-07-19 08:54:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:34,911 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2022-07-19 08:54:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:54:34,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 [2022-07-19 08:54:34,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:34,941 INFO L225 Difference]: With dead ends: 34 [2022-07-19 08:54:34,942 INFO L226 Difference]: Without dead ends: 16 [2022-07-19 08:54:34,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 08:54:34,948 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:34,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 34 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:34,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-19 08:54:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-07-19 08:54:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-19 08:54:34,976 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-07-19 08:54:34,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:34,977 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-19 08:54:34,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-07-19 08:54:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-19 08:54:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 08:54:34,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:34,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:34,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 08:54:34,979 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:34,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1564645395, now seen corresponding path program 1 times [2022-07-19 08:54:34,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:34,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102315817] [2022-07-19 08:54:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:34,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:35,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 08:54:35,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:35,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102315817] [2022-07-19 08:54:35,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102315817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:35,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671605776] [2022-07-19 08:54:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:35,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:35,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:35,048 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) [2022-07-19 08:54:35,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 08:54:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:35,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 08:54:35,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:35,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 08:54:35,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671605776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 08:54:35,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 08:54:35,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 08:54:35,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954897179] [2022-07-19 08:54:35,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 08:54:35,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 08:54:35,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:35,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 08:54:35,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:54:35,215 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-07-19 08:54:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:35,263 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-07-19 08:54:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 08:54:35,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 [2022-07-19 08:54:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:35,265 INFO L225 Difference]: With dead ends: 24 [2022-07-19 08:54:35,266 INFO L226 Difference]: Without dead ends: 17 [2022-07-19 08:54:35,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 08:54:35,268 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:35,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-19 08:54:35,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-07-19 08:54:35,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-19 08:54:35,275 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2022-07-19 08:54:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:35,275 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-19 08:54:35,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-07-19 08:54:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-19 08:54:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 08:54:35,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:35,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:35,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:35,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:35,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:35,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2022-07-19 08:54:35,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:35,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837442082] [2022-07-19 08:54:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:35,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:35,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:35,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:35,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837442082] [2022-07-19 08:54:35,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837442082] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:35,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438141544] [2022-07-19 08:54:35,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:35,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:35,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:35,545 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) [2022-07-19 08:54:35,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 08:54:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:35,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 08:54:35,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:35,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:35,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438141544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:35,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:35,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 08:54:35,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698249447] [2022-07-19 08:54:35,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:35,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 08:54:35,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:35,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 08:54:35,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:54:35,662 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-07-19 08:54:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:35,688 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-07-19 08:54:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 08:54:35,689 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 [2022-07-19 08:54:35,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:35,689 INFO L225 Difference]: With dead ends: 33 [2022-07-19 08:54:35,689 INFO L226 Difference]: Without dead ends: 22 [2022-07-19 08:54:35,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 08:54:35,691 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:35,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 08:54:35,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-19 08:54:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-19 08:54:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2022-07-19 08:54:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-19 08:54:35,696 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2022-07-19 08:54:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:35,696 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-19 08:54:35,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2022-07-19 08:54:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-19 08:54:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 08:54:35,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:35,698 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:35,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:35,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-19 08:54:35,909 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash 2021040587, now seen corresponding path program 2 times [2022-07-19 08:54:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:35,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122846168] [2022-07-19 08:54:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:35,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 08:54:36,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122846168] [2022-07-19 08:54:36,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122846168] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636231778] [2022-07-19 08:54:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:54:36,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:36,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:36,009 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) [2022-07-19 08:54:36,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 08:54:36,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 08:54:36,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:36,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 08:54:36,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:36,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 08:54:36,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636231778] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:36,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:36,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-19 08:54:36,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047509618] [2022-07-19 08:54:36,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:36,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 08:54:36,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:36,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 08:54:36,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-19 08:54:36,283 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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) [2022-07-19 08:54:36,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:36,360 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-07-19 08:54:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 08:54:36,361 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 [2022-07-19 08:54:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:36,362 INFO L225 Difference]: With dead ends: 48 [2022-07-19 08:54:36,364 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 08:54:36,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-19 08:54:36,366 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:36,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 50 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:54:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 08:54:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-07-19 08:54:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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) [2022-07-19 08:54:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-07-19 08:54:36,378 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 19 [2022-07-19 08:54:36,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:36,378 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-07-19 08:54:36,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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) [2022-07-19 08:54:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-07-19 08:54:36,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 08:54:36,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:36,380 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:36,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:36,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:36,596 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:36,600 INFO L85 PathProgramCache]: Analyzing trace with hash 709790269, now seen corresponding path program 3 times [2022-07-19 08:54:36,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:36,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540784103] [2022-07-19 08:54:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:36,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:36,893 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 08:54:36,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:36,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540784103] [2022-07-19 08:54:36,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540784103] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:36,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542845274] [2022-07-19 08:54:36,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 08:54:36,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:36,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:36,897 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) [2022-07-19 08:54:36,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 08:54:36,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 08:54:36,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:36,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 08:54:36,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 08:54:37,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 08:54:37,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542845274] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:37,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:37,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-19 08:54:37,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122210011] [2022-07-19 08:54:37,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:37,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 08:54:37,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 08:54:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-19 08:54:37,088 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 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) [2022-07-19 08:54:37,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:37,164 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-07-19 08:54:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 08:54:37,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 08:54:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:37,166 INFO L225 Difference]: With dead ends: 60 [2022-07-19 08:54:37,166 INFO L226 Difference]: Without dead ends: 47 [2022-07-19 08:54:37,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-19 08:54:37,167 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:37,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 60 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:54:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-19 08:54:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-19 08:54:37,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 08:54:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-07-19 08:54:37,174 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 33 [2022-07-19 08:54:37,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:37,175 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-07-19 08:54:37,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 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) [2022-07-19 08:54:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-07-19 08:54:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 08:54:37,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:37,176 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:37,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:37,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:37,392 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:37,392 INFO L85 PathProgramCache]: Analyzing trace with hash -593240461, now seen corresponding path program 4 times [2022-07-19 08:54:37,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:37,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25749188] [2022-07-19 08:54:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:37,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-19 08:54:37,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:37,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25749188] [2022-07-19 08:54:37,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25749188] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:37,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741456350] [2022-07-19 08:54:37,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 08:54:37,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:37,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:37,582 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) [2022-07-19 08:54:37,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 08:54:37,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 08:54:37,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:37,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 08:54:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-19 08:54:37,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-19 08:54:37,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741456350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:37,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:37,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2022-07-19 08:54:37,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52170102] [2022-07-19 08:54:37,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:37,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 08:54:37,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:37,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 08:54:37,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2022-07-19 08:54:37,935 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 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) [2022-07-19 08:54:38,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:38,037 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2022-07-19 08:54:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 08:54:38,038 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 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 43 [2022-07-19 08:54:38,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:38,039 INFO L225 Difference]: With dead ends: 86 [2022-07-19 08:54:38,039 INFO L226 Difference]: Without dead ends: 65 [2022-07-19 08:54:38,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2022-07-19 08:54:38,040 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:38,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 69 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:54:38,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-19 08:54:38,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-07-19 08:54:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 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) [2022-07-19 08:54:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-07-19 08:54:38,048 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 43 [2022-07-19 08:54:38,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:38,048 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-07-19 08:54:38,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 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) [2022-07-19 08:54:38,049 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-07-19 08:54:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 08:54:38,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:38,050 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:38,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:38,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:38,280 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:38,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:38,281 INFO L85 PathProgramCache]: Analyzing trace with hash 65706529, now seen corresponding path program 5 times [2022-07-19 08:54:38,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:38,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249438921] [2022-07-19 08:54:38,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:38,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-07-19 08:54:38,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:38,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249438921] [2022-07-19 08:54:38,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249438921] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:38,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708192077] [2022-07-19 08:54:38,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 08:54:38,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:38,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:38,444 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) [2022-07-19 08:54:38,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 08:54:42,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-19 08:54:42,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:42,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 08:54:42,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:42,954 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-19 08:54:42,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:43,358 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-19 08:54:43,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708192077] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:43,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:43,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 45 [2022-07-19 08:54:43,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319417898] [2022-07-19 08:54:43,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:43,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 08:54:43,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:43,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 08:54:43,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 08:54:43,362 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 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) [2022-07-19 08:54:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:43,503 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2022-07-19 08:54:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 08:54:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 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 61 [2022-07-19 08:54:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:43,507 INFO L225 Difference]: With dead ends: 136 [2022-07-19 08:54:43,508 INFO L226 Difference]: Without dead ends: 99 [2022-07-19 08:54:43,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=600, Invalid=1380, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 08:54:43,510 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:43,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 58 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:54:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-19 08:54:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-07-19 08:54:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 97 states have internal predecessors, (100), 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) [2022-07-19 08:54:43,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2022-07-19 08:54:43,535 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 61 [2022-07-19 08:54:43,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:43,536 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2022-07-19 08:54:43,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2) internal successors, (99), 45 states have internal predecessors, (99), 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) [2022-07-19 08:54:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2022-07-19 08:54:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 08:54:43,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:43,539 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:43,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:43,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:43,768 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:43,768 INFO L85 PathProgramCache]: Analyzing trace with hash -342693825, now seen corresponding path program 6 times [2022-07-19 08:54:43,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:43,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644631784] [2022-07-19 08:54:43,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:43,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-19 08:54:44,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:44,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644631784] [2022-07-19 08:54:44,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644631784] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:44,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227090283] [2022-07-19 08:54:44,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 08:54:44,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:44,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:44,023 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) [2022-07-19 08:54:44,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 08:54:51,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-07-19 08:54:51,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:51,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 08:54:51,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-19 08:54:51,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:51,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-19 08:54:51,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227090283] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:51,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:51,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-07-19 08:54:51,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080544561] [2022-07-19 08:54:51,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:51,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 08:54:51,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:51,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 08:54:51,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2022-07-19 08:54:51,768 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 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) [2022-07-19 08:54:51,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:51,865 INFO L93 Difference]: Finished difference Result 197 states and 215 transitions. [2022-07-19 08:54:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 08:54:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 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 95 [2022-07-19 08:54:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:51,867 INFO L225 Difference]: With dead ends: 197 [2022-07-19 08:54:51,867 INFO L226 Difference]: Without dead ends: 128 [2022-07-19 08:54:51,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2022-07-19 08:54:51,869 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:51,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 50 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:54:51,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-19 08:54:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-07-19 08:54:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.0236220472440944) internal successors, (130), 127 states have internal predecessors, (130), 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) [2022-07-19 08:54:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2022-07-19 08:54:51,889 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 95 [2022-07-19 08:54:51,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:51,889 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2022-07-19 08:54:51,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 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) [2022-07-19 08:54:51,890 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2022-07-19 08:54:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-19 08:54:51,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:51,895 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:51,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:52,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:52,124 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:52,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:52,124 INFO L85 PathProgramCache]: Analyzing trace with hash 819713505, now seen corresponding path program 7 times [2022-07-19 08:54:52,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:52,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531023743] [2022-07-19 08:54:52,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:52,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-19 08:54:52,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:52,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531023743] [2022-07-19 08:54:52,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531023743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:52,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730599343] [2022-07-19 08:54:52,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 08:54:52,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:52,590 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) [2022-07-19 08:54:52,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 08:54:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:52,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 08:54:52,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:52,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-19 08:54:52,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1684 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-19 08:54:53,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730599343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:53,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:53,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2022-07-19 08:54:53,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693893887] [2022-07-19 08:54:53,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:53,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-19 08:54:53,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:53,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-19 08:54:53,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 08:54:53,916 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 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) [2022-07-19 08:54:54,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:54:54,114 INFO L93 Difference]: Finished difference Result 257 states and 290 transitions. [2022-07-19 08:54:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 08:54:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 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 125 [2022-07-19 08:54:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:54:54,116 INFO L225 Difference]: With dead ends: 257 [2022-07-19 08:54:54,116 INFO L226 Difference]: Without dead ends: 188 [2022-07-19 08:54:54,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 08:54:54,118 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 87 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 08:54:54,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 74 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 08:54:54,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-19 08:54:54,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-07-19 08:54:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0160427807486632) internal successors, (190), 187 states have internal predecessors, (190), 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) [2022-07-19 08:54:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2022-07-19 08:54:54,124 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 125 [2022-07-19 08:54:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:54:54,125 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2022-07-19 08:54:54,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 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) [2022-07-19 08:54:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2022-07-19 08:54:54,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-19 08:54:54,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:54:54,134 INFO L195 NwaCegarLoop]: trace histogram [58, 58, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:54:54,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 08:54:54,359 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,SelfDestructingSolverStorable8 [2022-07-19 08:54:54,360 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:54:54,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:54:54,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1843021147, now seen corresponding path program 8 times [2022-07-19 08:54:54,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:54:54,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728154304] [2022-07-19 08:54:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:54:54,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:54:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:54:55,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-19 08:54:55,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:54:55,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728154304] [2022-07-19 08:54:55,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728154304] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:54:55,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260455436] [2022-07-19 08:54:55,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 08:54:55,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:54:55,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:54:55,826 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 08:54:55,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 08:54:56,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 08:54:56,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:54:56,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-19 08:54:56,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:54:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-19 08:54:56,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:54:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4264 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-19 08:54:59,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260455436] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:54:59,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:54:59,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 121 [2022-07-19 08:54:59,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556888065] [2022-07-19 08:54:59,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:54:59,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-07-19 08:54:59,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:54:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-07-19 08:54:59,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2022-07-19 08:54:59,646 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 121 states have internal predecessors, (248), 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) [2022-07-19 08:55:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:55:00,021 INFO L93 Difference]: Finished difference Result 377 states and 440 transitions. [2022-07-19 08:55:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-07-19 08:55:00,022 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 121 states have internal predecessors, (248), 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 185 [2022-07-19 08:55:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:55:00,023 INFO L225 Difference]: With dead ends: 377 [2022-07-19 08:55:00,023 INFO L226 Difference]: Without dead ends: 308 [2022-07-19 08:55:00,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2022-07-19 08:55:00,026 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 118 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 08:55:00,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 98 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 08:55:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-19 08:55:00,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-07-19 08:55:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.009771986970684) internal successors, (310), 307 states have internal predecessors, (310), 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) [2022-07-19 08:55:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 310 transitions. [2022-07-19 08:55:00,036 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 310 transitions. Word has length 185 [2022-07-19 08:55:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:55:00,037 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 310 transitions. [2022-07-19 08:55:00,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.049586776859504) internal successors, (248), 121 states have internal predecessors, (248), 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) [2022-07-19 08:55:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 310 transitions. [2022-07-19 08:55:00,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-07-19 08:55:00,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:55:00,041 INFO L195 NwaCegarLoop]: trace histogram [118, 118, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:55:00,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 08:55:00,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 08:55:00,252 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:55:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:55:00,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1223502381, now seen corresponding path program 9 times [2022-07-19 08:55:00,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:55:00,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722586254] [2022-07-19 08:55:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:55:00,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:55:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:55:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14824 backedges. 0 proven. 13924 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-07-19 08:55:05,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:55:05,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722586254] [2022-07-19 08:55:05,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722586254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:55:05,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518437953] [2022-07-19 08:55:05,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 08:55:05,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:55:05,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:55:05,376 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 08:55:05,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 08:56:54,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-07-19 08:56:54,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:56:54,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 08:56:54,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:56:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14824 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 13924 trivial. 0 not checked. [2022-07-19 08:56:56,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:56:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14824 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 13924 trivial. 0 not checked. [2022-07-19 08:56:58,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518437953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:56:58,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:56:58,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 33, 33] total 183 [2022-07-19 08:56:58,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830921259] [2022-07-19 08:56:58,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:56:58,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-07-19 08:56:58,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:56:58,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-07-19 08:56:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9275, Invalid=24031, Unknown=0, NotChecked=0, Total=33306 [2022-07-19 08:56:58,332 INFO L87 Difference]: Start difference. First operand 308 states and 310 transitions. Second operand has 183 states, 183 states have (on average 2.0491803278688523) internal successors, (375), 183 states have internal predecessors, (375), 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) [2022-07-19 08:56:58,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:56:58,861 INFO L93 Difference]: Finished difference Result 444 states and 480 transitions. [2022-07-19 08:56:58,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-07-19 08:56:58,861 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 2.0491803278688523) internal successors, (375), 183 states have internal predecessors, (375), 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 305 [2022-07-19 08:56:58,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:56:58,863 INFO L225 Difference]: With dead ends: 444 [2022-07-19 08:56:58,864 INFO L226 Difference]: Without dead ends: 375 [2022-07-19 08:56:58,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 548 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7316 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=9275, Invalid=24031, Unknown=0, NotChecked=0, Total=33306 [2022-07-19 08:56:58,867 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 212 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 08:56:58,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 80 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 08:56:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-07-19 08:56:58,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 374. [2022-07-19 08:56:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 1.0080428954423593) internal successors, (376), 373 states have internal predecessors, (376), 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) [2022-07-19 08:56:58,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 376 transitions. [2022-07-19 08:56:58,885 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 376 transitions. Word has length 305 [2022-07-19 08:56:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:56:58,886 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 376 transitions. [2022-07-19 08:56:58,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 2.0491803278688523) internal successors, (375), 183 states have internal predecessors, (375), 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) [2022-07-19 08:56:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 376 transitions. [2022-07-19 08:56:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-07-19 08:56:58,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:56:58,891 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:56:58,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 08:56:59,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 08:56:59,103 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:56:59,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:56:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1039493419, now seen corresponding path program 10 times [2022-07-19 08:56:59,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:56:59,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643391660] [2022-07-19 08:56:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:56:59,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:56:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:57:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18005 backedges. 0 proven. 14161 refuted. 0 times theorem prover too weak. 3844 trivial. 0 not checked. [2022-07-19 08:57:03,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:57:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643391660] [2022-07-19 08:57:03,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643391660] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:57:03,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190191002] [2022-07-19 08:57:03,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 08:57:03,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:57:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:57:03,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 08:57:03,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 08:57:04,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 08:57:04,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 08:57:04,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 2522 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-19 08:57:04,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 08:57:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 18005 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 14161 trivial. 0 not checked. [2022-07-19 08:57:08,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 08:57:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18005 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 14161 trivial. 0 not checked. [2022-07-19 08:57:14,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190191002] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 08:57:14,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 08:57:14,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 65, 65] total 248 [2022-07-19 08:57:14,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097879815] [2022-07-19 08:57:14,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 08:57:14,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 248 states [2022-07-19 08:57:14,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 08:57:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 248 interpolants. [2022-07-19 08:57:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15508, Invalid=45748, Unknown=0, NotChecked=0, Total=61256 [2022-07-19 08:57:14,018 INFO L87 Difference]: Start difference. First operand 374 states and 376 transitions. Second operand has 248 states, 248 states have (on average 2.036290322580645) internal successors, (505), 248 states have internal predecessors, (505), 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) [2022-07-19 08:57:14,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 08:57:14,745 INFO L93 Difference]: Finished difference Result 638 states and 706 transitions. [2022-07-19 08:57:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2022-07-19 08:57:14,752 INFO L78 Accepts]: Start accepts. Automaton has has 248 states, 248 states have (on average 2.036290322580645) internal successors, (505), 248 states have internal predecessors, (505), 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 371 [2022-07-19 08:57:14,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 08:57:14,755 INFO L225 Difference]: With dead ends: 638 [2022-07-19 08:57:14,755 INFO L226 Difference]: Without dead ends: 505 [2022-07-19 08:57:14,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 616 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14994 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=15508, Invalid=45748, Unknown=0, NotChecked=0, Total=61256 [2022-07-19 08:57:14,762 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 246 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 08:57:14,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 68 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 08:57:14,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-19 08:57:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 504. [2022-07-19 08:57:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 1.0059642147117296) internal successors, (506), 503 states have internal predecessors, (506), 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) [2022-07-19 08:57:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 506 transitions. [2022-07-19 08:57:14,774 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 506 transitions. Word has length 371 [2022-07-19 08:57:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 08:57:14,775 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 506 transitions. [2022-07-19 08:57:14,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 248 states, 248 states have (on average 2.036290322580645) internal successors, (505), 248 states have internal predecessors, (505), 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) [2022-07-19 08:57:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 506 transitions. [2022-07-19 08:57:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2022-07-19 08:57:14,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 08:57:14,784 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 08:57:14,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 08:57:15,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 08:57:15,004 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 08:57:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 08:57:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash -707565463, now seen corresponding path program 11 times [2022-07-19 08:57:15,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 08:57:15,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891372189] [2022-07-19 08:57:15,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 08:57:15,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 08:57:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 08:57:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30276 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 15876 trivial. 0 not checked. [2022-07-19 08:57:20,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 08:57:20,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891372189] [2022-07-19 08:57:20,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891372189] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 08:57:20,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824269197] [2022-07-19 08:57:20,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 08:57:20,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 08:57:20,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 08:57:20,029 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 08:57:20,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process