./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-cav19/array_init_var_plus_ind2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:32:15,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:32:15,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:32:15,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:32:15,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:32:15,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:32:15,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:32:15,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:32:15,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:32:15,902 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:32:15,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:32:15,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:32:15,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:32:15,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:32:15,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:32:15,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:32:15,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:32:15,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:32:15,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:32:15,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:32:15,923 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:32:15,924 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:32:15,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:32:15,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:32:15,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:32:15,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:32:15,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:32:15,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:32:15,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:32:15,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:32:15,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:32:15,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:32:15,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:32:15,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:32:15,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:32:15,942 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:32:15,943 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:32:15,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:32:15,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:32:15,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:32:15,945 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:32:15,946 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:32:15,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:32:15,976 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:32:15,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:32:15,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:32:15,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:32:15,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:32:15,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:32:15,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:32:15,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:32:15,979 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:32:15,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:32:15,980 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:32:15,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:32:15,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:32:15,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:32:15,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:32:15,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:32:15,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:32:15,981 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:32:15,981 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:32:15,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:32:15,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:32:15,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:32:15,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:32:15,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:32:15,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:32:15,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:32:15,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:32:15,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:32:15,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:32:15,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:32:15,984 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:32:15,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:32:15,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:32:15,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61ee7f467544bc9f9ea1f0d9fd399b9972cb81a4a1640bca414247c42e8cc99d [2022-07-22 10:32:16,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:32:16,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:32:16,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:32:16,284 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:32:16,285 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:32:16,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2022-07-22 10:32:16,361 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0fcf53b/b4c5eda6ca6940f3847f4447891bbe69/FLAG96623e324 [2022-07-22 10:32:16,730 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:32:16,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2022-07-22 10:32:16,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0fcf53b/b4c5eda6ca6940f3847f4447891bbe69/FLAG96623e324 [2022-07-22 10:32:17,175 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd0fcf53b/b4c5eda6ca6940f3847f4447891bbe69 [2022-07-22 10:32:17,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:32:17,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:32:17,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:32:17,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:32:17,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:32:17,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4a581c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17, skipping insertion in model container [2022-07-22 10:32:17,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:32:17,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:32:17,311 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-cav19/array_init_var_plus_ind2.c[415,428] [2022-07-22 10:32:17,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:32:17,358 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:32:17,372 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-cav19/array_init_var_plus_ind2.c[415,428] [2022-07-22 10:32:17,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:32:17,396 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:32:17,397 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17 WrapperNode [2022-07-22 10:32:17,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:32:17,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:32:17,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:32:17,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:32:17,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,430 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 53 [2022-07-22 10:32:17,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:32:17,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:32:17,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:32:17,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:32:17,439 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,452 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,464 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:32:17,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:32:17,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:32:17,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:32:17,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (1/1) ... [2022-07-22 10:32:17,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:32:17,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:17,508 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) [2022-07-22 10:32:17,522 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 [2022-07-22 10:32:17,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:32:17,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:32:17,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 10:32:17,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:32:17,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:32:17,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:32:17,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:32:17,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 10:32:17,609 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:32:17,610 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:32:17,696 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:32:17,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:32:17,703 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 10:32:17,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:32:17 BoogieIcfgContainer [2022-07-22 10:32:17,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:32:17,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:32:17,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:32:17,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:32:17,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:32:17" (1/3) ... [2022-07-22 10:32:17,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787ee67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:32:17, skipping insertion in model container [2022-07-22 10:32:17,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:32:17" (2/3) ... [2022-07-22 10:32:17,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@787ee67e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:32:17, skipping insertion in model container [2022-07-22 10:32:17,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:32:17" (3/3) ... [2022-07-22 10:32:17,713 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2022-07-22 10:32:17,726 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:32:17,726 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:32:17,782 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:32:17,790 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@3747f946, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@23899cd9 [2022-07-22 10:32:17,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:32:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2022-07-22 10:32:17,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 10:32:17,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:17,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:17,801 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2022-07-22 10:32:17,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:17,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490620246] [2022-07-22 10:32:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:17,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:17,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:17,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490620246] [2022-07-22 10:32:17,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490620246] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:32:17,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:32:17,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:32:17,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312961633] [2022-07-22 10:32:17,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:32:17,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:32:17,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:17,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:32:17,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:32:17,971 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-22 10:32:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:17,983 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-07-22 10:32:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:32:17,986 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-07-22 10:32:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:17,993 INFO L225 Difference]: With dead ends: 27 [2022-07-22 10:32:17,994 INFO L226 Difference]: Without dead ends: 12 [2022-07-22 10:32:17,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:32:18,004 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:18,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:32:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-22 10:32:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-22 10:32:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2022-07-22 10:32:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-22 10:32:18,031 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2022-07-22 10:32:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:18,032 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-22 10:32:18,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-07-22 10:32:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-22 10:32:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 10:32:18,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:18,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:18,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:32:18,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2022-07-22 10:32:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:18,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119603552] [2022-07-22 10:32:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:18,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:18,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:18,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119603552] [2022-07-22 10:32:18,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119603552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:32:18,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:32:18,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 10:32:18,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793904652] [2022-07-22 10:32:18,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:32:18,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:32:18,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:18,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:32:18,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:32:18,102 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-07-22 10:32:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:18,130 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-07-22 10:32:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:32:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-07-22 10:32:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:18,131 INFO L225 Difference]: With dead ends: 29 [2022-07-22 10:32:18,131 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 10:32:18,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:32:18,133 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:18,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:32:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 10:32:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2022-07-22 10:32:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:32:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-22 10:32:18,138 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-07-22 10:32:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:18,139 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-22 10:32:18,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-07-22 10:32:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-22 10:32:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 10:32:18,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:18,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:18,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 10:32:18,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:18,141 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2022-07-22 10:32:18,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:18,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624045846] [2022-07-22 10:32:18,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:18,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:18,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:18,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624045846] [2022-07-22 10:32:18,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624045846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:32:18,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:32:18,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 10:32:18,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735745249] [2022-07-22 10:32:18,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:32:18,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 10:32:18,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:18,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 10:32:18,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:32:18,189 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:32:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:18,211 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-07-22 10:32:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:32:18,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 10:32:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:18,212 INFO L225 Difference]: With dead ends: 23 [2022-07-22 10:32:18,212 INFO L226 Difference]: Without dead ends: 15 [2022-07-22 10:32:18,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 10:32:18,214 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:18,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:32:18,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-22 10:32:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-07-22 10:32:18,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-07-22 10:32:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-22 10:32:18,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-22 10:32:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:18,219 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-22 10:32:18,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:32:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-22 10:32:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 10:32:18,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:18,220 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:18,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 10:32:18,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:18,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2022-07-22 10:32:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:18,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134604066] [2022-07-22 10:32:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:18,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:18,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:18,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134604066] [2022-07-22 10:32:18,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134604066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:18,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472477724] [2022-07-22 10:32:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:18,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:18,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:18,355 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) [2022-07-22 10:32:18,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:32:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:32:18,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:18,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:18,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472477724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:18,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:18,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-07-22 10:32:18,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036865099] [2022-07-22 10:32:18,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:18,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 10:32:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:18,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 10:32:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-22 10:32:18,572 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-07-22 10:32:18,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:18,692 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-22 10:32:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 10:32:18,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) Word has length 10 [2022-07-22 10:32:18,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:18,693 INFO L225 Difference]: With dead ends: 45 [2022-07-22 10:32:18,695 INFO L226 Difference]: Without dead ends: 36 [2022-07-22 10:32:18,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-22 10:32:18,698 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 100 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:18,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:32:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-22 10:32:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2022-07-22 10:32:18,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:32:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-22 10:32:18,712 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2022-07-22 10:32:18,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:18,713 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-22 10:32:18,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-07-22 10:32:18,713 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-22 10:32:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 10:32:18,715 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:18,715 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:18,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 10:32:18,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:18,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:18,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:18,936 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2022-07-22 10:32:18,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:18,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878843021] [2022-07-22 10:32:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:18,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:19,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:19,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878843021] [2022-07-22 10:32:19,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878843021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:19,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609991538] [2022-07-22 10:32:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:19,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:19,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:19,196 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) [2022-07-22 10:32:19,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:32:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 10:32:19,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:19,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 10:32:19,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:32:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:19,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:19,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-22 10:32:19,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-22 10:32:19,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:19,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609991538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:19,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:19,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-07-22 10:32:19,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259756984] [2022-07-22 10:32:19,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:19,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 10:32:19,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:19,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 10:32:19,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2022-07-22 10:32:19,622 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 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) [2022-07-22 10:32:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:19,760 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-07-22 10:32:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:32:19,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 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 14 [2022-07-22 10:32:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:19,762 INFO L225 Difference]: With dead ends: 37 [2022-07-22 10:32:19,762 INFO L226 Difference]: Without dead ends: 35 [2022-07-22 10:32:19,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-07-22 10:32:19,763 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:19,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 113 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-07-22 10:32:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-22 10:32:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-07-22 10:32:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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) [2022-07-22 10:32:19,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-22 10:32:19,787 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-07-22 10:32:19,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:19,787 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-22 10:32:19,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 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) [2022-07-22 10:32:19,789 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-22 10:32:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 10:32:19,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:19,790 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:19,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:32:20,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:20,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2022-07-22 10:32:20,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:20,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074557519] [2022-07-22 10:32:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:20,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:20,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:20,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:20,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074557519] [2022-07-22 10:32:20,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074557519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:20,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726793874] [2022-07-22 10:32:20,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:32:20,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:20,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:20,288 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) [2022-07-22 10:32:20,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:32:20,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:32:20,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:20,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 10:32:20,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:20,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:32:20,481 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:20,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:20,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:32:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:20,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:32,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-07-22 10:32:32,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 90 [2022-07-22 10:32:32,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:32,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726793874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:32,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:32,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2022-07-22 10:32:32,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098807861] [2022-07-22 10:32:32,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:32,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:32:32,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:32,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:32:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=427, Unknown=6, NotChecked=0, Total=506 [2022-07-22 10:32:32,936 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2022-07-22 10:32:33,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:33,229 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-07-22 10:32:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 10:32:33,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-22 10:32:33,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:33,233 INFO L225 Difference]: With dead ends: 50 [2022-07-22 10:32:33,233 INFO L226 Difference]: Without dead ends: 48 [2022-07-22 10:32:33,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=152, Invalid=834, Unknown=6, NotChecked=0, Total=992 [2022-07-22 10:32:33,235 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:33,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 140 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 171 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-07-22 10:32:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-22 10:32:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 26. [2022-07-22 10:32:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:32:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-22 10:32:33,243 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-07-22 10:32:33,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:33,244 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-22 10:32:33,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 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) [2022-07-22 10:32:33,244 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-22 10:32:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 10:32:33,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:33,245 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:33,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 10:32:33,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:33,468 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2022-07-22 10:32:33,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:33,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000453407] [2022-07-22 10:32:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:33,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000453407] [2022-07-22 10:32:33,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000453407] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:33,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450040808] [2022-07-22 10:32:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:33,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:33,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:33,537 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) [2022-07-22 10:32:33,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:32:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:33,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:32:33,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:33,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:33,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450040808] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:33,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:33,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-22 10:32:33,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814504056] [2022-07-22 10:32:33,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:33,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 10:32:33,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:33,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 10:32:33,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-22 10:32:33,670 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:32:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:33,706 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-07-22 10:32:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 10:32:33,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-22 10:32:33,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:33,708 INFO L225 Difference]: With dead ends: 38 [2022-07-22 10:32:33,708 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 10:32:33,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-22 10:32:33,709 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:33,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 55 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:32:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 10:32:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-22 10:32:33,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:32:33,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-22 10:32:33,718 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-07-22 10:32:33,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:33,718 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-22 10:32:33,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:32:33,718 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-22 10:32:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 10:32:33,719 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:33,719 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:33,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 10:32:33,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:33,935 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:33,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:33,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1429725775, now seen corresponding path program 2 times [2022-07-22 10:32:33,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:33,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418956186] [2022-07-22 10:32:33,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:33,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:34,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:34,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418956186] [2022-07-22 10:32:34,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418956186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:34,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632396668] [2022-07-22 10:32:34,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:32:34,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:34,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:34,012 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) [2022-07-22 10:32:34,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 10:32:34,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:32:34,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:34,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 10:32:34,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:34,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:34,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632396668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:34,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:34,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-07-22 10:32:34,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432867036] [2022-07-22 10:32:34,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:34,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 10:32:34,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:34,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 10:32:34,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2022-07-22 10:32:34,239 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 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) [2022-07-22 10:32:34,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:34,387 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-07-22 10:32:34,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 10:32:34,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 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) Word has length 19 [2022-07-22 10:32:34,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:34,390 INFO L225 Difference]: With dead ends: 98 [2022-07-22 10:32:34,390 INFO L226 Difference]: Without dead ends: 91 [2022-07-22 10:32:34,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2022-07-22 10:32:34,392 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 264 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:34,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 99 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:32:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-22 10:32:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 43. [2022-07-22 10:32:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 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) [2022-07-22 10:32:34,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-07-22 10:32:34,404 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 19 [2022-07-22 10:32:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:34,404 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-07-22 10:32:34,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 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) [2022-07-22 10:32:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-07-22 10:32:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 10:32:34,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:34,405 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:34,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 10:32:34,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:34,631 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:34,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1421454960, now seen corresponding path program 3 times [2022-07-22 10:32:34,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:34,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734476664] [2022-07-22 10:32:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:34,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:34,832 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:34,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:34,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734476664] [2022-07-22 10:32:34,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734476664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:34,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920584915] [2022-07-22 10:32:34,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:32:34,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:34,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:34,837 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) [2022-07-22 10:32:34,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 10:32:34,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 10:32:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:34,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 10:32:34,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:34,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:32:35,045 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:35,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:35,114 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:35,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:35,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:32:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:32:35,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:11,363 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_43| Int)) (or (forall ((v_ArrVal_104 Int) (|v_ULTIMATE.start_main_~i~0#1_42| Int) (v_ArrVal_105 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_43| 1) |v_ULTIMATE.start_main_~i~0#1_42|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_43| |v_ULTIMATE.start_main_~i~0#1_42| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_43| 4)) v_ArrVal_104) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_42| 4)) v_ArrVal_105) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_43|)))) is different from false [2022-07-22 10:33:11,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-07-22 10:33:11,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 210 [2022-07-22 10:33:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-07-22 10:33:11,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920584915] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:11,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:11,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-22 10:33:11,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608818076] [2022-07-22 10:33:11,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:11,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:33:11,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:11,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:33:11,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=626, Unknown=27, NotChecked=52, Total=812 [2022-07-22 10:33:11,646 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2022-07-22 10:33:13,684 WARN L833 $PredicateComparison]: unable to prove that (and (<= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~k~0#1|) 0) (<= 0 |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_43| Int)) (or (forall ((v_ArrVal_104 Int) (|v_ULTIMATE.start_main_~i~0#1_42| Int) (v_ArrVal_105 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_43| 1) |v_ULTIMATE.start_main_~i~0#1_42|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_43| |v_ULTIMATE.start_main_~i~0#1_42| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_43| 4)) v_ArrVal_104) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_42| 4)) v_ArrVal_105) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_43|)))) (<= |c_ULTIMATE.start_main_~k~0#1| 0) (= (+ (- 1) |c_ULTIMATE.start_main_~i~0#1|) 0) (<= 0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|)))) is different from false [2022-07-22 10:33:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:33:14,548 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2022-07-22 10:33:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 10:33:14,548 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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 20 [2022-07-22 10:33:14,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:33:14,550 INFO L225 Difference]: With dead ends: 59 [2022-07-22 10:33:14,550 INFO L226 Difference]: Without dead ends: 57 [2022-07-22 10:33:14,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=271, Invalid=1114, Unknown=29, NotChecked=146, Total=1560 [2022-07-22 10:33:14,552 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:33:14,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 127 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 247 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-07-22 10:33:14,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-22 10:33:14,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2022-07-22 10:33:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 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) [2022-07-22 10:33:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-07-22 10:33:14,558 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 20 [2022-07-22 10:33:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:33:14,558 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-07-22 10:33:14,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 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) [2022-07-22 10:33:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-07-22 10:33:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 10:33:14,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:33:14,559 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:33:14,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 10:33:14,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:14,777 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:33:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:33:14,777 INFO L85 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2022-07-22 10:33:14,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:33:14,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527225632] [2022-07-22 10:33:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:33:14,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:33:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:14,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:14,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527225632] [2022-07-22 10:33:14,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527225632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:14,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299608958] [2022-07-22 10:33:14,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:33:14,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:14,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:14,945 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) [2022-07-22 10:33:14,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 10:33:15,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:33:15,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:33:15,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 10:33:15,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:15,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:33:15,292 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-22 10:33:15,293 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-22 10:33:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:15,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:15,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-22 10:33:15,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-22 10:33:15,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:15,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299608958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:15,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:15,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-22 10:33:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795237785] [2022-07-22 10:33:15,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:15,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:33:15,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:33:15,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:33:15,697 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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) [2022-07-22 10:33:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:33:15,897 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-07-22 10:33:15,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 10:33:15,897 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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 21 [2022-07-22 10:33:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:33:15,898 INFO L225 Difference]: With dead ends: 54 [2022-07-22 10:33:15,898 INFO L226 Difference]: Without dead ends: 42 [2022-07-22 10:33:15,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 10:33:15,899 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:33:15,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 92 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 177 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-07-22 10:33:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-22 10:33:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-22 10:33:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 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) [2022-07-22 10:33:15,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-07-22 10:33:15,904 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2022-07-22 10:33:15,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:33:15,904 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-07-22 10:33:15,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 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) [2022-07-22 10:33:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-07-22 10:33:15,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 10:33:15,905 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:33:15,905 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:33:15,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 10:33:16,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:16,106 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:33:16,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:33:16,106 INFO L85 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2022-07-22 10:33:16,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:33:16,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084617964] [2022-07-22 10:33:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:33:16,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:33:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:16,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:16,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084617964] [2022-07-22 10:33:16,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084617964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:16,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895080759] [2022-07-22 10:33:16,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:33:16,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:16,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:16,295 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) [2022-07-22 10:33:16,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 10:33:16,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 10:33:16,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:33:16,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 10:33:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:16,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:33:16,532 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 10:33:16,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 10:33:16,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:33:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:16,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:16,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-07-22 10:33:16,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 224 [2022-07-22 10:33:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:17,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895080759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:17,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:17,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-07-22 10:33:17,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102823698] [2022-07-22 10:33:17,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:17,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 10:33:17,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:17,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 10:33:17,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-07-22 10:33:17,027 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 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) [2022-07-22 10:33:17,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:33:17,348 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2022-07-22 10:33:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 10:33:17,348 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 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 24 [2022-07-22 10:33:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:33:17,349 INFO L225 Difference]: With dead ends: 60 [2022-07-22 10:33:17,349 INFO L226 Difference]: Without dead ends: 58 [2022-07-22 10:33:17,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 10:33:17,350 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:33:17,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 185 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 337 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-07-22 10:33:17,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-22 10:33:17,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2022-07-22 10:33:17,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:33:17,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-07-22 10:33:17,355 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 24 [2022-07-22 10:33:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:33:17,355 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-07-22 10:33:17,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 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) [2022-07-22 10:33:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-07-22 10:33:17,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 10:33:17,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:33:17,356 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:33:17,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 10:33:17,557 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,SelfDestructingSolverStorable10 [2022-07-22 10:33:17,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:33:17,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:33:17,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 4 times [2022-07-22 10:33:17,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:33:17,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907179982] [2022-07-22 10:33:17,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:33:17,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:33:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:17,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:17,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907179982] [2022-07-22 10:33:17,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907179982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:17,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933253143] [2022-07-22 10:33:17,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:33:17,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:17,782 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) [2022-07-22 10:33:17,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 10:33:17,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:33:17,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:33:17,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 10:33:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:17,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:33:17,998 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:33:17,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:33:18,055 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:33:18,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:33:18,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:33:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:18,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:52,270 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_67| Int)) (or (forall ((v_ArrVal_178 Int) (v_ArrVal_175 Int) (|v_ULTIMATE.start_main_~i~0#1_66| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_67| 1) |v_ULTIMATE.start_main_~i~0#1_66|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_66| |v_ULTIMATE.start_main_~i~0#1_67| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_67| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_175) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_178) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 8)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_67|)))) is different from false [2022-07-22 10:33:52,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-07-22 10:33:52,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3754 treesize of output 3690 [2022-07-22 10:33:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-22 10:33:53,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933253143] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:53,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:53,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 38 [2022-07-22 10:33:53,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961890003] [2022-07-22 10:33:53,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:53,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 10:33:53,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:53,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 10:33:53,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1162, Unknown=29, NotChecked=70, Total=1406 [2022-07-22 10:33:53,445 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 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) [2022-07-22 10:33:55,513 WARN L833 $PredicateComparison]: unable to prove that (and (<= 1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|))) (forall ((|v_ULTIMATE.start_main_~i~0#1_67| Int)) (or (forall ((v_ArrVal_178 Int) (v_ArrVal_175 Int) (|v_ULTIMATE.start_main_~i~0#1_66| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_67| 1) |v_ULTIMATE.start_main_~i~0#1_66|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_66| |v_ULTIMATE.start_main_~i~0#1_67| (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_67| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_175) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_178) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 8)))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_67|)))) (= 2 |c_ULTIMATE.start_main_~i~0#1|) (<= (+ |c_ULTIMATE.start_main_~k~0#1| 1) 0) (<= 1 |c_ULTIMATE.start_main_~j~0#1|) (<= (+ |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~k~0#1| 1) 0)) is different from false [2022-07-22 10:33:58,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:33:58,562 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-07-22 10:33:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 10:33:58,562 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 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 27 [2022-07-22 10:33:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:33:58,563 INFO L225 Difference]: With dead ends: 67 [2022-07-22 10:33:58,563 INFO L226 Difference]: Without dead ends: 65 [2022-07-22 10:33:58,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 39.3s TimeCoverageRelationStatistics Valid=364, Invalid=2368, Unknown=32, NotChecked=206, Total=2970 [2022-07-22 10:33:58,565 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 83 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:33:58,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 248 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 489 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2022-07-22 10:33:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-22 10:33:58,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2022-07-22 10:33:58,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:33:58,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-22 10:33:58,571 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 27 [2022-07-22 10:33:58,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:33:58,571 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-22 10:33:58,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 38 states have internal predecessors, (76), 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) [2022-07-22 10:33:58,572 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-22 10:33:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 10:33:58,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:33:58,572 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 10:33:58,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 10:33:58,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:58,787 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:33:58,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:33:58,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2053274844, now seen corresponding path program 5 times [2022-07-22 10:33:58,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:33:58,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863426534] [2022-07-22 10:33:58,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:33:58,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:33:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:59,063 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:59,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:59,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863426534] [2022-07-22 10:33:59,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863426534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:59,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748022750] [2022-07-22 10:33:59,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:33:59,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:59,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:59,068 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) [2022-07-22 10:33:59,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 10:33:59,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-22 10:33:59,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:33:59,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 10:33:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:59,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-22 10:33:59,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:33:59,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:59,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:59,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-22 10:33:59,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-22 10:33:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:33:59,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748022750] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:59,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:59,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 36 [2022-07-22 10:33:59,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564181858] [2022-07-22 10:33:59,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:59,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-22 10:33:59,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:59,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-22 10:33:59,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 10:33:59,799 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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) [2022-07-22 10:34:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:34:00,299 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2022-07-22 10:34:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 10:34:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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 28 [2022-07-22 10:34:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:34:00,300 INFO L225 Difference]: With dead ends: 68 [2022-07-22 10:34:00,300 INFO L226 Difference]: Without dead ends: 66 [2022-07-22 10:34:00,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=2295, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 10:34:00,301 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:34:00,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 205 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 287 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-07-22 10:34:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-22 10:34:00,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2022-07-22 10:34:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 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) [2022-07-22 10:34:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-22 10:34:00,308 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 28 [2022-07-22 10:34:00,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:34:00,309 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-22 10:34:00,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 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) [2022-07-22 10:34:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-22 10:34:00,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 10:34:00,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:34:00,310 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 10:34:00,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 10:34:00,523 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,SelfDestructingSolverStorable12 [2022-07-22 10:34:00,524 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:34:00,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:34:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 6 times [2022-07-22 10:34:00,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:34:00,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335981204] [2022-07-22 10:34:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:34:00,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:34:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:34:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:00,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:34:00,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335981204] [2022-07-22 10:34:00,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335981204] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:34:00,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476036981] [2022-07-22 10:34:00,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:34:00,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:34:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:34:00,797 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) [2022-07-22 10:34:00,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 10:34:00,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 10:34:00,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:34:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 10:34:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:34:01,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:34:01,068 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:34:01,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:34:01,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:34:01,233 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:01,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:34:11,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-07-22 10:34:11,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 90 [2022-07-22 10:34:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:11,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476036981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:34:11,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:34:11,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2022-07-22 10:34:11,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294235376] [2022-07-22 10:34:11,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:34:11,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 10:34:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:34:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 10:34:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1500, Unknown=5, NotChecked=0, Total=1640 [2022-07-22 10:34:11,749 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:34:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:34:14,749 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2022-07-22 10:34:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 10:34:14,750 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-22 10:34:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:34:14,752 INFO L225 Difference]: With dead ends: 88 [2022-07-22 10:34:14,752 INFO L226 Difference]: Without dead ends: 86 [2022-07-22 10:34:14,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=348, Invalid=3806, Unknown=6, NotChecked=0, Total=4160 [2022-07-22 10:34:14,754 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:34:14,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 382 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 627 Invalid, 0 Unknown, 65 Unchecked, 0.3s Time] [2022-07-22 10:34:14,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-22 10:34:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2022-07-22 10:34:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.16) internal successors, (58), 50 states have internal predecessors, (58), 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) [2022-07-22 10:34:14,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2022-07-22 10:34:14,761 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 31 [2022-07-22 10:34:14,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:34:14,761 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2022-07-22 10:34:14,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:34:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2022-07-22 10:34:14,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 10:34:14,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:34:14,762 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-22 10:34:14,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 10:34:14,967 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,SelfDestructingSolverStorable13 [2022-07-22 10:34:14,968 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:34:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:34:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1640133522, now seen corresponding path program 7 times [2022-07-22 10:34:14,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:34:14,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492793857] [2022-07-22 10:34:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:34:14,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:34:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:34:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:15,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:34:15,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492793857] [2022-07-22 10:34:15,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492793857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:34:15,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644696065] [2022-07-22 10:34:15,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:34:15,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:34:15,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:34:15,044 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) [2022-07-22 10:34:15,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 10:34:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:34:15,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:34:15,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:34:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:15,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:34:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:15,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644696065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:34:15,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:34:15,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 10:34:15,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93895268] [2022-07-22 10:34:15,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:34:15,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:34:15,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:34:15,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:34:15,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:34:15,275 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-07-22 10:34:15,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:34:15,349 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-07-22 10:34:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 10:34:15,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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 32 [2022-07-22 10:34:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:34:15,350 INFO L225 Difference]: With dead ends: 71 [2022-07-22 10:34:15,350 INFO L226 Difference]: Without dead ends: 51 [2022-07-22 10:34:15,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:34:15,351 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:34:15,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:34:15,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-22 10:34:15,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-22 10:34:15,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 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) [2022-07-22 10:34:15,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-22 10:34:15,359 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 32 [2022-07-22 10:34:15,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:34:15,359 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-22 10:34:15,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 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) [2022-07-22 10:34:15,359 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-22 10:34:15,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-22 10:34:15,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:34:15,360 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 10:34:15,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 10:34:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 10:34:15,572 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:34:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:34:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1605814044, now seen corresponding path program 8 times [2022-07-22 10:34:15,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:34:15,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147018990] [2022-07-22 10:34:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:34:15,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:34:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:34:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:15,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:34:15,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147018990] [2022-07-22 10:34:15,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147018990] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:34:15,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727432762] [2022-07-22 10:34:15,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:34:15,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:34:15,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:34:15,905 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:34:15,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 10:34:15,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:34:15,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:34:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 10:34:15,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:34:16,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:34:16,233 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:34:16,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:34:16,307 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:34:16,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:34:16,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:34:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:16,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:34:52,669 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (forall ((v_ArrVal_279 Int) (|v_ULTIMATE.start_main_~i~0#1_104| Int) (v_ArrVal_281 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_105| 1) |v_ULTIMATE.start_main_~i~0#1_104|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_105| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_279) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_104| 4)) v_ArrVal_281) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12)) |v_ULTIMATE.start_main_~i~0#1_105| |v_ULTIMATE.start_main_~i~0#1_104|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_105|)))) is different from false [2022-07-22 10:34:52,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-07-22 10:34:52,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 450 treesize of output 442 [2022-07-22 10:34:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-07-22 10:34:53,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727432762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:34:53,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:34:53,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2022-07-22 10:34:53,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698625605] [2022-07-22 10:34:53,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:34:53,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 10:34:53,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:34:53,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 10:34:53,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1880, Unknown=29, NotChecked=88, Total=2162 [2022-07-22 10:34:53,107 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 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) [2022-07-22 10:34:55,858 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|))) (let ((.cse1 (+ 15 |c_ULTIMATE.start_main_~k~0#1|)) (.cse2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) .cse0))) (and (<= .cse0 12) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (<= 3 |c_ULTIMATE.start_main_~j~0#1|) (<= (+ 3 |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~k~0#1|) 0) (<= .cse1 (+ |c_ULTIMATE.start_main_~j~0#1| (* 3 |c_ULTIMATE.start_main_~i~0#1|))) (<= .cse1 (+ (* 2 |c_ULTIMATE.start_main_~i~0#1|) .cse2)) (= 3 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_105| Int)) (or (forall ((v_ArrVal_279 Int) (|v_ULTIMATE.start_main_~i~0#1_104| Int) (v_ArrVal_281 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_105| 1) |v_ULTIMATE.start_main_~i~0#1_104|)) (<= |c_ULTIMATE.start_main_~k~0#1| (+ (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_105| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_279) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_104| 4)) v_ArrVal_281) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12)) |v_ULTIMATE.start_main_~i~0#1_105| |v_ULTIMATE.start_main_~i~0#1_104|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_105|)))) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 3 .cse2) (<= (+ 3 |c_ULTIMATE.start_main_~k~0#1|) 0)))) is different from false [2022-07-22 10:34:57,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:34:57,905 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-07-22 10:34:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 10:34:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 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 34 [2022-07-22 10:34:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:34:57,906 INFO L225 Difference]: With dead ends: 75 [2022-07-22 10:34:57,906 INFO L226 Difference]: Without dead ends: 73 [2022-07-22 10:34:57,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=481, Invalid=4750, Unknown=33, NotChecked=286, Total=5550 [2022-07-22 10:34:57,908 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 90 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:34:57,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 408 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 789 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2022-07-22 10:34:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-22 10:34:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2022-07-22 10:34:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 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) [2022-07-22 10:34:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-07-22 10:34:57,917 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 34 [2022-07-22 10:34:57,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:34:57,917 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-07-22 10:34:57,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 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) [2022-07-22 10:34:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-07-22 10:34:57,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 10:34:57,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:34:57,918 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-22 10:34:57,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 10:34:58,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 10:34:58,124 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:34:58,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:34:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash -246527464, now seen corresponding path program 9 times [2022-07-22 10:34:58,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:34:58,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209383751] [2022-07-22 10:34:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:34:58,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:34:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:34:58,389 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:58,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:34:58,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209383751] [2022-07-22 10:34:58,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209383751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:34:58,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411414385] [2022-07-22 10:34:58,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:34:58,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:34:58,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:34:58,392 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:34:58,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 10:34:58,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 10:34:58,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:34:58,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 10:34:58,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:34:58,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:34:58,946 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-22 10:34:58,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-22 10:34:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:58,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:34:59,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-22 10:34:59,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-22 10:34:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:34:59,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411414385] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:34:59,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:34:59,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2022-07-22 10:34:59,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130500694] [2022-07-22 10:34:59,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:34:59,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 10:34:59,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:34:59,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 10:34:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1809, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 10:34:59,671 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 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) [2022-07-22 10:35:00,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:35:00,034 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-07-22 10:35:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 10:35:00,034 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 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) Word has length 35 [2022-07-22 10:35:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:35:00,035 INFO L225 Difference]: With dead ends: 70 [2022-07-22 10:35:00,035 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 10:35:00,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=448, Invalid=2414, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 10:35:00,036 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:35:00,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 128 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 330 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-07-22 10:35:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 10:35:00,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-22 10:35:00,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 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) [2022-07-22 10:35:00,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-07-22 10:35:00,043 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 35 [2022-07-22 10:35:00,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:35:00,044 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-07-22 10:35:00,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.127659574468085) internal successors, (100), 47 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) [2022-07-22 10:35:00,044 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-07-22 10:35:00,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 10:35:00,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:35:00,045 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-22 10:35:00,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 10:35:00,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:35:00,245 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:35:00,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:35:00,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1821925934, now seen corresponding path program 10 times [2022-07-22 10:35:00,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:35:00,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648564737] [2022-07-22 10:35:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:35:00,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:35:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:35:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:35:00,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:35:00,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648564737] [2022-07-22 10:35:00,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648564737] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:35:00,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406064125] [2022-07-22 10:35:00,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:35:00,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:35:00,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:35:00,549 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:35:00,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 10:35:00,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:35:00,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:35:00,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 10:35:00,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:35:00,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:35:00,921 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:35:00,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:35:01,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:35:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:35:01,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:35:23,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-07-22 10:35:23,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 90 [2022-07-22 10:35:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:35:23,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406064125] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:35:23,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:35:23,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 50 [2022-07-22 10:35:23,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501807965] [2022-07-22 10:35:23,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:35:23,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 10:35:23,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:35:23,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 10:35:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2251, Unknown=11, NotChecked=0, Total=2450 [2022-07-22 10:35:23,760 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 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) [2022-07-22 10:35:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:35:24,155 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-07-22 10:35:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 10:35:24,155 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 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 38 [2022-07-22 10:35:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:35:24,156 INFO L225 Difference]: With dead ends: 76 [2022-07-22 10:35:24,156 INFO L226 Difference]: Without dead ends: 74 [2022-07-22 10:35:24,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=264, Invalid=3031, Unknown=11, NotChecked=0, Total=3306 [2022-07-22 10:35:24,157 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 25 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:35:24,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 349 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 496 Invalid, 0 Unknown, 183 Unchecked, 0.2s Time] [2022-07-22 10:35:24,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-22 10:35:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2022-07-22 10:35:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 54 states have internal predecessors, (60), 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) [2022-07-22 10:35:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2022-07-22 10:35:24,166 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 38 [2022-07-22 10:35:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:35:24,166 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2022-07-22 10:35:24,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.18) internal successors, (109), 50 states have internal predecessors, (109), 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) [2022-07-22 10:35:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2022-07-22 10:35:24,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-22 10:35:24,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:35:24,168 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-22 10:35:24,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-22 10:35:24,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 10:35:24,384 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:35:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:35:24,384 INFO L85 PathProgramCache]: Analyzing trace with hash 884864984, now seen corresponding path program 11 times [2022-07-22 10:35:24,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:35:24,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229374293] [2022-07-22 10:35:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:35:24,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:35:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:35:24,674 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:35:24,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:35:24,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229374293] [2022-07-22 10:35:24,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229374293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:35:24,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936231188] [2022-07-22 10:35:24,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:35:24,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:35:24,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:35:24,676 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:35:24,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 10:35:24,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 10:35:24,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:35:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 10:35:24,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:35:24,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:35:25,077 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:35:25,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:35:25,147 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:35:25,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:35:25,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:35:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:35:25,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:36:16,614 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_141| Int)) (or (forall ((v_ArrVal_377 Int) (v_ArrVal_376 Int) (|v_ULTIMATE.start_main_~i~0#1_140| Int)) (or (<= |c_ULTIMATE.start_main_~k~0#1| (+ (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_141| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_376) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_140| 4)) v_ArrVal_377) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)) |v_ULTIMATE.start_main_~i~0#1_141| |v_ULTIMATE.start_main_~i~0#1_140|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_141| 1) |v_ULTIMATE.start_main_~i~0#1_140|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_141|)))) is different from false [2022-07-22 10:36:16,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-07-22 10:36:16,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1866 treesize of output 1834 [2022-07-22 10:36:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-22 10:36:17,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936231188] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:36:17,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:36:17,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2022-07-22 10:36:17,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104551230] [2022-07-22 10:36:17,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:36:17,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 10:36:17,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:36:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 10:36:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2704, Unknown=49, NotChecked=106, Total=3080 [2022-07-22 10:36:17,574 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 56 states have internal predecessors, (118), 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) [2022-07-22 10:36:19,752 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 2 |c_ULTIMATE.start_main_~i~0#1|))) (and (<= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|))) (<= .cse0 |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_141| Int)) (or (forall ((v_ArrVal_377 Int) (v_ArrVal_376 Int) (|v_ULTIMATE.start_main_~i~0#1_140| Int)) (or (<= |c_ULTIMATE.start_main_~k~0#1| (+ (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_141| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_376) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_140| 4)) v_ArrVal_377) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)) |v_ULTIMATE.start_main_~i~0#1_141| |v_ULTIMATE.start_main_~i~0#1_140|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_141| 1) |v_ULTIMATE.start_main_~i~0#1_140|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_141|)))) (<= (+ (* 2 |c_ULTIMATE.start_main_~i~0#1|) 2 |c_ULTIMATE.start_main_~k~0#1|) 0) (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~k~0#1|) 0) (= 3 (+ (- 1) |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2022-07-22 10:36:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:36:20,574 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-07-22 10:36:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 10:36:20,575 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 56 states have internal predecessors, (118), 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 41 [2022-07-22 10:36:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:36:20,576 INFO L225 Difference]: With dead ends: 83 [2022-07-22 10:36:20,576 INFO L226 Difference]: Without dead ends: 81 [2022-07-22 10:36:20,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=594, Invalid=5216, Unknown=50, NotChecked=302, Total=6162 [2022-07-22 10:36:20,578 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 100 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 10:36:20,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 490 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1083 Invalid, 0 Unknown, 103 Unchecked, 0.5s Time] [2022-07-22 10:36:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-22 10:36:20,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2022-07-22 10:36:20,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 53 states have internal predecessors, (59), 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) [2022-07-22 10:36:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-07-22 10:36:20,586 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 41 [2022-07-22 10:36:20,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:36:20,587 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-07-22 10:36:20,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.107142857142857) internal successors, (118), 56 states have internal predecessors, (118), 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) [2022-07-22 10:36:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-07-22 10:36:20,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 10:36:20,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:36:20,588 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 10:36:20,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 10:36:20,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:36:20,788 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:36:20,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:36:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1086466440, now seen corresponding path program 12 times [2022-07-22 10:36:20,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:36:20,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386434369] [2022-07-22 10:36:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:36:20,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:36:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:36:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:36:21,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:36:21,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386434369] [2022-07-22 10:36:21,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386434369] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:36:21,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074274913] [2022-07-22 10:36:21,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:36:21,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:36:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:36:21,084 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:36:21,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 10:36:21,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 10:36:21,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:36:21,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 10:36:21,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:36:21,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:36:21,765 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-22 10:36:21,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2022-07-22 10:36:21,797 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:36:21,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:36:22,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-22 10:36:22,134 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-07-22 10:36:22,556 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 24 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:36:22,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074274913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:36:22,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:36:22,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 56 [2022-07-22 10:36:22,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051867882] [2022-07-22 10:36:22,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:36:22,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 10:36:22,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:36:22,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 10:36:22,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=2655, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 10:36:22,558 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 56 states have internal predecessors, (121), 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) [2022-07-22 10:36:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:36:23,048 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2022-07-22 10:36:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 10:36:23,049 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 56 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-22 10:36:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:36:23,049 INFO L225 Difference]: With dead ends: 78 [2022-07-22 10:36:23,049 INFO L226 Difference]: Without dead ends: 54 [2022-07-22 10:36:23,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=586, Invalid=3970, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 10:36:23,051 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:36:23,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 240 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 547 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-07-22 10:36:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-22 10:36:23,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-22 10:36:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 53 states have internal predecessors, (58), 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) [2022-07-22 10:36:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-07-22 10:36:23,068 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 42 [2022-07-22 10:36:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:36:23,069 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-07-22 10:36:23,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.1607142857142856) internal successors, (121), 56 states have internal predecessors, (121), 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) [2022-07-22 10:36:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-07-22 10:36:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 10:36:23,071 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:36:23,071 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 10:36:23,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 10:36:23,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:36:23,284 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:36:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:36:23,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1001394318, now seen corresponding path program 13 times [2022-07-22 10:36:23,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:36:23,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428428182] [2022-07-22 10:36:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:36:23,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:36:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:36:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:36:23,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:36:23,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428428182] [2022-07-22 10:36:23,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428428182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:36:23,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011364880] [2022-07-22 10:36:23,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:36:23,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:36:23,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:36:23,667 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:36:23,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 10:36:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:36:23,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 10:36:23,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:36:24,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 10:36:24,108 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:36:24,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:36:24,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 10:36:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:36:24,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:36:50,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-07-22 10:36:50,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 90 [2022-07-22 10:36:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:36:51,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011364880] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:36:51,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:36:51,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 59 [2022-07-22 10:36:51,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013777552] [2022-07-22 10:36:51,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:36:51,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 10:36:51,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:36:51,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 10:36:51,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3183, Unknown=13, NotChecked=0, Total=3422 [2022-07-22 10:36:51,160 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 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) [2022-07-22 10:36:51,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:36:51,921 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2022-07-22 10:36:51,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 10:36:51,921 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 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) Word has length 45 [2022-07-22 10:36:51,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:36:51,922 INFO L225 Difference]: With dead ends: 63 [2022-07-22 10:36:51,922 INFO L226 Difference]: Without dead ends: 61 [2022-07-22 10:36:51,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=417, Invalid=4826, Unknown=13, NotChecked=0, Total=5256 [2022-07-22 10:36:51,923 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 73 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:36:51,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 319 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 929 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-07-22 10:36:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-22 10:36:51,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-07-22 10:36:51,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 10:36:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-07-22 10:36:51,931 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 45 [2022-07-22 10:36:51,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:36:51,931 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-07-22 10:36:51,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 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) [2022-07-22 10:36:51,932 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-07-22 10:36:51,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 10:36:51,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:36:51,932 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-07-22 10:36:51,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-22 10:36:52,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:36:52,140 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:36:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:36:52,140 INFO L85 PathProgramCache]: Analyzing trace with hash -707076540, now seen corresponding path program 14 times [2022-07-22 10:36:52,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:36:52,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735521731] [2022-07-22 10:36:52,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:36:52,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:36:52,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:36:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 10:36:52,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:36:52,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735521731] [2022-07-22 10:36:52,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735521731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:36:52,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54983853] [2022-07-22 10:36:52,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:36:52,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:36:52,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:36:52,521 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:36:52,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 10:36:52,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:36:52,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:36:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 10:36:52,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:36:52,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11