./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.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 c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 10:17:54,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 10:17:54,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 10:17:54,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 10:17:54,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 10:17:54,922 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 10:17:54,922 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 10:17:54,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 10:17:54,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 10:17:54,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 10:17:54,925 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 10:17:54,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 10:17:54,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 10:17:54,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 10:17:54,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 10:17:54,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 10:17:54,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 10:17:54,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 10:17:54,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 10:17:54,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 10:17:54,932 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 10:17:54,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 10:17:54,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 10:17:54,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 10:17:54,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 10:17:54,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 10:17:54,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 10:17:54,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 10:17:54,945 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 10:17:54,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 10:17:54,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 10:17:54,946 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 10:17:54,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 10:17:54,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 10:17:54,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 10:17:54,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 10:17:54,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 10:17:54,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 10:17:54,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 10:17:54,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 10:17:54,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 10:17:54,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 10:17:54,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 10:17:54,978 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 10:17:54,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 10:17:54,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 10:17:54,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 10:17:54,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 10:17:54,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 10:17:54,981 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 10:17:54,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 10:17:54,981 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 10:17:54,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 10:17:54,982 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 10:17:54,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 10:17:54,982 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 10:17:54,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 10:17:54,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 10:17:54,983 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 10:17:54,983 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 10:17:54,983 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 10:17:54,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 10:17:54,983 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 10:17:54,984 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 10:17:54,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 10:17:54,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 10:17:54,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 10:17:54,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:17:54,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 10:17:54,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 10:17:54,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 10:17:54,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 10:17:54,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 10:17:54,986 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 10:17:54,986 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 10:17:54,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 10:17:54,987 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 [2022-07-19 10:17:55,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 10:17:55,211 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 10:17:55,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 10:17:55,214 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 10:17:55,215 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 10:17:55,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2022-07-19 10:17:55,263 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ff53124/ba347c56ff40449f8cdc6bc4700644fe/FLAG30d2bc508 [2022-07-19 10:17:55,640 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 10:17:55,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2022-07-19 10:17:55,645 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ff53124/ba347c56ff40449f8cdc6bc4700644fe/FLAG30d2bc508 [2022-07-19 10:17:56,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2ff53124/ba347c56ff40449f8cdc6bc4700644fe [2022-07-19 10:17:56,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 10:17:56,078 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 10:17:56,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 10:17:56,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 10:17:56,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 10:17:56,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b507b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56, skipping insertion in model container [2022-07-19 10:17:56,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 10:17:56,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 10:17:56,201 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_ind.c[414,427] [2022-07-19 10:17:56,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:17:56,228 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 10:17:56,238 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_ind.c[414,427] [2022-07-19 10:17:56,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 10:17:56,253 INFO L208 MainTranslator]: Completed translation [2022-07-19 10:17:56,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56 WrapperNode [2022-07-19 10:17:56,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 10:17:56,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 10:17:56,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 10:17:56,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 10:17:56,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,278 INFO L137 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2022-07-19 10:17:56,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 10:17:56,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 10:17:56,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 10:17:56,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 10:17:56,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 10:17:56,312 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 10:17:56,312 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 10:17:56,312 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 10:17:56,313 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (1/1) ... [2022-07-19 10:17:56,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 10:17:56,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:56,355 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 10:17:56,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 10:17:56,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 10:17:56,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 10:17:56,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 10:17:56,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 10:17:56,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 10:17:56,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 10:17:56,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 10:17:56,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 10:17:56,446 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 10:17:56,448 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 10:17:56,563 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 10:17:56,567 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 10:17:56,579 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 10:17:56,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:17:56 BoogieIcfgContainer [2022-07-19 10:17:56,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 10:17:56,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 10:17:56,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 10:17:56,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 10:17:56,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:17:56" (1/3) ... [2022-07-19 10:17:56,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b020576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:17:56, skipping insertion in model container [2022-07-19 10:17:56,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:17:56" (2/3) ... [2022-07-19 10:17:56,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b020576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:17:56, skipping insertion in model container [2022-07-19 10:17:56,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:17:56" (3/3) ... [2022-07-19 10:17:56,587 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2022-07-19 10:17:56,596 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 10:17:56,596 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 10:17:56,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 10:17:56,630 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@930ce89, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68bed78a [2022-07-19 10:17:56,630 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 10:17:56,633 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) [2022-07-19 10:17:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-19 10:17:56,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:56,638 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:56,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:56,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1818270042, now seen corresponding path program 1 times [2022-07-19 10:17:56,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:56,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533365081] [2022-07-19 10:17:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:56,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:56,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:56,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533365081] [2022-07-19 10:17:56,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533365081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:17:56,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:17:56,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 10:17:56,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704192356] [2022-07-19 10:17:56,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:17:56,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 10:17:56,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:56,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 10:17:56,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 10:17:56,777 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) [2022-07-19 10:17:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:56,788 INFO L93 Difference]: Finished difference Result 27 states and 34 transitions. [2022-07-19 10:17:56,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 10:17:56,789 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 [2022-07-19 10:17:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:56,798 INFO L225 Difference]: With dead ends: 27 [2022-07-19 10:17:56,799 INFO L226 Difference]: Without dead ends: 12 [2022-07-19 10:17:56,801 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 [2022-07-19 10:17:56,807 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 [2022-07-19 10:17:56,808 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] [2022-07-19 10:17:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-19 10:17:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-19 10:17:56,828 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) [2022-07-19 10:17:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-07-19 10:17:56,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 7 [2022-07-19 10:17:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:56,830 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-07-19 10:17:56,830 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) [2022-07-19 10:17:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-07-19 10:17:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-19 10:17:56,830 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:56,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 10:17:56,831 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:56,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1808111311, now seen corresponding path program 1 times [2022-07-19 10:17:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:56,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662972834] [2022-07-19 10:17:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:56,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:56,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:56,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662972834] [2022-07-19 10:17:56,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662972834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:17:56,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:17:56,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 10:17:56,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138367748] [2022-07-19 10:17:56,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:17:56,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:17:56,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:17:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:17:56,902 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) [2022-07-19 10:17:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:56,924 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-07-19 10:17:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:17:56,925 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 [2022-07-19 10:17:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:56,927 INFO L225 Difference]: With dead ends: 29 [2022-07-19 10:17:56,927 INFO L226 Difference]: Without dead ends: 22 [2022-07-19 10:17:56,927 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 [2022-07-19 10:17:56,928 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 [2022-07-19 10:17:56,930 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] [2022-07-19 10:17:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-19 10:17:56,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 13. [2022-07-19 10:17:56,937 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) [2022-07-19 10:17:56,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-07-19 10:17:56,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 7 [2022-07-19 10:17:56,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:56,938 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-07-19 10:17:56,938 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) [2022-07-19 10:17:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-07-19 10:17:56,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 10:17:56,940 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:56,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:56,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 10:17:56,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:56,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:56,942 INFO L85 PathProgramCache]: Analyzing trace with hash 266504688, now seen corresponding path program 1 times [2022-07-19 10:17:56,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:56,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440551409] [2022-07-19 10:17:56,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:56,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:56,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:56,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440551409] [2022-07-19 10:17:56,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440551409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 10:17:56,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 10:17:56,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 10:17:56,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226971236] [2022-07-19 10:17:56,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 10:17:57,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 10:17:57,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:57,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 10:17:57,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 10:17:57,002 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) [2022-07-19 10:17:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:57,027 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2022-07-19 10:17:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 10:17:57,027 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 [2022-07-19 10:17:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:57,029 INFO L225 Difference]: With dead ends: 23 [2022-07-19 10:17:57,029 INFO L226 Difference]: Without dead ends: 15 [2022-07-19 10:17:57,030 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 [2022-07-19 10:17:57,035 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 [2022-07-19 10:17:57,037 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] [2022-07-19 10:17:57,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-19 10:17:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2022-07-19 10:17:57,041 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) [2022-07-19 10:17:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-19 10:17:57,042 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-19 10:17:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:57,042 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-19 10:17:57,042 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) [2022-07-19 10:17:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-19 10:17:57,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-19 10:17:57,043 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:57,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:57,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 10:17:57,044 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash 53732745, now seen corresponding path program 1 times [2022-07-19 10:17:57,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:57,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787791750] [2022-07-19 10:17:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:57,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:57,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:57,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787791750] [2022-07-19 10:17:57,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787791750] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:57,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266446646] [2022-07-19 10:17:57,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:57,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:57,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:57,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:57,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 10:17:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:57,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 10:17:57,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:57,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:57,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:57,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266446646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:57,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:57,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-07-19 10:17:57,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044460039] [2022-07-19 10:17:57,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:57,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:17:57,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:57,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:17:57,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:17:57,240 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) [2022-07-19 10:17:57,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:57,307 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2022-07-19 10:17:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 10:17:57,308 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 [2022-07-19 10:17:57,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:57,308 INFO L225 Difference]: With dead ends: 45 [2022-07-19 10:17:57,308 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 10:17:57,309 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 [2022-07-19 10:17:57,310 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:57,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 52 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:17:57,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 10:17:57,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2022-07-19 10:17:57,313 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) [2022-07-19 10:17:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-19 10:17:57,314 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2022-07-19 10:17:57,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:57,314 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-19 10:17:57,315 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) [2022-07-19 10:17:57,315 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-19 10:17:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 10:17:57,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:57,315 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:57,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 10:17:57,518 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 [2022-07-19 10:17:57,519 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash -334334928, now seen corresponding path program 1 times [2022-07-19 10:17:57,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:57,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830342662] [2022-07-19 10:17:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:57,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:57,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:57,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830342662] [2022-07-19 10:17:57,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830342662] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:57,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048510831] [2022-07-19 10:17:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:57,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:57,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:57,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:57,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 10:17:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 10:17:57,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:57,798 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 [2022-07-19 10:17:57,867 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 [2022-07-19 10:17:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:57,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:17:57,969 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 16 treesize of output 14 [2022-07-19 10:17:57,975 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 32 treesize of output 28 [2022-07-19 10:17:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:58,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048510831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:17:58,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:17:58,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2022-07-19 10:17:58,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127457723] [2022-07-19 10:17:58,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:17:58,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:17:58,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:17:58,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:17:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:17:58,029 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:17:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:17:58,100 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-07-19 10:17:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:17:58,101 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-19 10:17:58,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:17:58,101 INFO L225 Difference]: With dead ends: 37 [2022-07-19 10:17:58,101 INFO L226 Difference]: Without dead ends: 35 [2022-07-19 10:17:58,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:17:58,102 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:17:58,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 63 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:17:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-19 10:17:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 25. [2022-07-19 10:17:58,106 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) [2022-07-19 10:17:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-19 10:17:58,106 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2022-07-19 10:17:58,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:17:58,106 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-19 10:17:58,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:17:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-19 10:17:58,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 10:17:58,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:17:58,107 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:17:58,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 10:17:58,326 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 [2022-07-19 10:17:58,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:17:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:17:58,327 INFO L85 PathProgramCache]: Analyzing trace with hash -768933834, now seen corresponding path program 2 times [2022-07-19 10:17:58,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:17:58,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919011623] [2022-07-19 10:17:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:17:58,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:17:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:17:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:58,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:17:58,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919011623] [2022-07-19 10:17:58,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919011623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:17:58,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474801117] [2022-07-19 10:17:58,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:17:58,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:17:58,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:17:58,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:17:58,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 10:17:58,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:17:58,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:17:58,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 10:17:58,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:17:58,616 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 [2022-07-19 10:17:58,655 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:17:58,655 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 [2022-07-19 10:17:58,711 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 [2022-07-19 10:17:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:17:58,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:00,806 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_21| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_21|)) (forall ((v_ArrVal_48 Int)) (<= 0 (select (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_21| 4)) v_ArrVal_48) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) is different from false [2022-07-19 10:18:00,842 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 23 treesize of output 21 [2022-07-19 10:18:00,846 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 82 treesize of output 78 [2022-07-19 10:18:00,923 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-19 10:18:00,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474801117] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:00,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:00,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 10:18:00,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816922068] [2022-07-19 10:18:00,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:00,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 10:18:00,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:00,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 10:18:00,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=254, Unknown=1, NotChecked=32, Total=342 [2022-07-19 10:18:00,925 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:18:02,948 WARN L833 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main_~j~0#1|) (<= 1 |c_ULTIMATE.start_main_~i~0#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|)) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_21| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_21|)) (forall ((v_ArrVal_48 Int)) (<= 0 (select (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_21| 4)) v_ArrVal_48) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)))))) (<= |c_ULTIMATE.start_main_~i~0#1| 1) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2022-07-19 10:18:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:03,061 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-07-19 10:18:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 10:18:03,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 10:18:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:03,062 INFO L225 Difference]: With dead ends: 43 [2022-07-19 10:18:03,062 INFO L226 Difference]: Without dead ends: 41 [2022-07-19 10:18:03,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=115, Invalid=443, Unknown=2, NotChecked=90, Total=650 [2022-07-19 10:18:03,063 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:03,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-07-19 10:18:03,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-19 10:18:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-07-19 10:18:03,067 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) [2022-07-19 10:18:03,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-19 10:18:03,067 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-07-19 10:18:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:03,068 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-19 10:18:03,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:18:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-19 10:18:03,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 10:18:03,068 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:03,068 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:03,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:03,284 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 [2022-07-19 10:18:03,285 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:03,285 INFO L85 PathProgramCache]: Analyzing trace with hash 20881638, now seen corresponding path program 1 times [2022-07-19 10:18:03,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:03,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279930185] [2022-07-19 10:18:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:03,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:03,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:03,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279930185] [2022-07-19 10:18:03,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279930185] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675452395] [2022-07-19 10:18:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:03,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:03,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:03,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:03,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 10:18:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:03,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 10:18:03,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:03,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:03,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:03,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675452395] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:03,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:03,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-19 10:18:03,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658379879] [2022-07-19 10:18:03,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:03,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 10:18:03,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:03,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 10:18:03,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 10:18:03,423 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) [2022-07-19 10:18:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:03,447 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-07-19 10:18:03,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 10:18:03,448 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 [2022-07-19 10:18:03,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:03,448 INFO L225 Difference]: With dead ends: 38 [2022-07-19 10:18:03,449 INFO L226 Difference]: Without dead ends: 26 [2022-07-19 10:18:03,449 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 [2022-07-19 10:18:03,449 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:03,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 40 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 10:18:03,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-19 10:18:03,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-19 10:18:03,452 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) [2022-07-19 10:18:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-19 10:18:03,453 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2022-07-19 10:18:03,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:03,453 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-19 10:18:03,453 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) [2022-07-19 10:18:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-19 10:18:03,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 10:18:03,454 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:03,454 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:03,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 10:18:03,670 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 [2022-07-19 10:18:03,671 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:03,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:03,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1429725775, now seen corresponding path program 2 times [2022-07-19 10:18:03,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:03,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870604652] [2022-07-19 10:18:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:03,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:03,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:03,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870604652] [2022-07-19 10:18:03,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870604652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:03,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618566942] [2022-07-19 10:18:03,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:18:03,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:03,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:03,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:03,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 10:18:03,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:18:03,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:03,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 10:18:03,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:03,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:03,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618566942] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:03,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:03,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-07-19 10:18:03,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681112512] [2022-07-19 10:18:03,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:03,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 10:18:03,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:03,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 10:18:03,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=195, Unknown=0, NotChecked=0, Total=342 [2022-07-19 10:18:03,895 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) [2022-07-19 10:18:04,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:04,013 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-07-19 10:18:04,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 10:18:04,014 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 [2022-07-19 10:18:04,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:04,018 INFO L225 Difference]: With dead ends: 98 [2022-07-19 10:18:04,018 INFO L226 Difference]: Without dead ends: 91 [2022-07-19 10:18:04,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=222, Invalid=330, Unknown=0, NotChecked=0, Total=552 [2022-07-19 10:18:04,019 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 234 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:04,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 102 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:18:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-19 10:18:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 43. [2022-07-19 10:18:04,030 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) [2022-07-19 10:18:04,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-07-19 10:18:04,032 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 19 [2022-07-19 10:18:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:04,032 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-07-19 10:18:04,032 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) [2022-07-19 10:18:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-07-19 10:18:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 10:18:04,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:04,033 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:04,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:04,247 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 [2022-07-19 10:18:04,248 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1421454960, now seen corresponding path program 3 times [2022-07-19 10:18:04,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:04,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129964974] [2022-07-19 10:18:04,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:04,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:04,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:04,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129964974] [2022-07-19 10:18:04,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129964974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:04,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985367191] [2022-07-19 10:18:04,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:18:04,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:04,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:04,419 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:04,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 10:18:04,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 10:18:04,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:04,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 10:18:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:04,491 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 [2022-07-19 10:18:04,518 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:04,519 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 [2022-07-19 10:18:04,543 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:04,543 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 [2022-07-19 10:18:04,567 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 [2022-07-19 10:18:04,579 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:04,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:04,681 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 16 treesize of output 14 [2022-07-19 10:18:04,688 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 32 treesize of output 28 [2022-07-19 10:18:04,725 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 10:18:04,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985367191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:04,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:04,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-07-19 10:18:04,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467536302] [2022-07-19 10:18:04,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:04,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 10:18:04,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:04,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 10:18:04,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-07-19 10:18:04,727 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:18:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:04,840 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-19 10:18:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 10:18:04,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2022-07-19 10:18:04,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:04,842 INFO L225 Difference]: With dead ends: 50 [2022-07-19 10:18:04,843 INFO L226 Difference]: Without dead ends: 48 [2022-07-19 10:18:04,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-07-19 10:18:04,843 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:04,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:18:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-19 10:18:04,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-07-19 10:18:04,847 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) [2022-07-19 10:18:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-07-19 10:18:04,848 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 20 [2022-07-19 10:18:04,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:04,848 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-07-19 10:18:04,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:18:04,848 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-07-19 10:18:04,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 10:18:04,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:04,849 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:04,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:05,086 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 [2022-07-19 10:18:05,087 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash -796542484, now seen corresponding path program 2 times [2022-07-19 10:18:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:05,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778490803] [2022-07-19 10:18:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:05,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:05,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:05,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778490803] [2022-07-19 10:18:05,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778490803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:05,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66708332] [2022-07-19 10:18:05,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:18:05,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:05,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:05,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:05,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 10:18:05,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:18:05,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:05,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-19 10:18:05,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:05,301 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 [2022-07-19 10:18:05,408 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:18:05,408 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 23 treesize of output 10 [2022-07-19 10:18:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:05,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:05,545 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 [2022-07-19 10:18:05,548 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 38 treesize of output 32 [2022-07-19 10:18:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:05,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66708332] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:05,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:05,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2022-07-19 10:18:05,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213649388] [2022-07-19 10:18:05,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:05,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 10:18:05,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:05,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 10:18:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2022-07-19 10:18:05,704 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-07-19 10:18:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:05,782 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-19 10:18:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 10:18:05,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) Word has length 21 [2022-07-19 10:18:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:05,783 INFO L225 Difference]: With dead ends: 53 [2022-07-19 10:18:05,783 INFO L226 Difference]: Without dead ends: 42 [2022-07-19 10:18:05,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2022-07-19 10:18:05,784 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:05,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 63 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 79 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-07-19 10:18:05,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-19 10:18:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-07-19 10:18:05,788 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) [2022-07-19 10:18:05,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-07-19 10:18:05,788 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 21 [2022-07-19 10:18:05,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:05,789 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-07-19 10:18:05,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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) [2022-07-19 10:18:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-07-19 10:18:05,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 10:18:05,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:05,789 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:05,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:06,006 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 [2022-07-19 10:18:06,007 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:06,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:06,007 INFO L85 PathProgramCache]: Analyzing trace with hash -213992666, now seen corresponding path program 3 times [2022-07-19 10:18:06,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:06,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714615239] [2022-07-19 10:18:06,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:06,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:06,126 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:06,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:06,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714615239] [2022-07-19 10:18:06,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714615239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:06,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590468917] [2022-07-19 10:18:06,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:18:06,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:06,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:06,128 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:06,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 10:18:06,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 10:18:06,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:06,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 10:18:06,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:06,207 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 [2022-07-19 10:18:06,239 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-19 10:18:06,240 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 28 treesize of output 27 [2022-07-19 10:18:06,293 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 [2022-07-19 10:18:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:06,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:06,405 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 24 treesize of output 22 [2022-07-19 10:18:06,408 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 192 treesize of output 184 [2022-07-19 10:18:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:06,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590468917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:06,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:06,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-07-19 10:18:06,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585738257] [2022-07-19 10:18:06,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:06,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 10:18:06,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 10:18:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-07-19 10:18:06,554 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2022-07-19 10:18:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:06,673 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-07-19 10:18:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 10:18:06,674 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) Word has length 24 [2022-07-19 10:18:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:06,674 INFO L225 Difference]: With dead ends: 54 [2022-07-19 10:18:06,674 INFO L226 Difference]: Without dead ends: 52 [2022-07-19 10:18:06,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-07-19 10:18:06,675 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:06,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 113 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 184 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-07-19 10:18:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-19 10:18:06,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-07-19 10:18:06,678 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) [2022-07-19 10:18:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-07-19 10:18:06,679 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 24 [2022-07-19 10:18:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:06,679 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-07-19 10:18:06,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2022-07-19 10:18:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-07-19 10:18:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 10:18:06,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:06,679 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:06,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:06,886 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 [2022-07-19 10:18:06,887 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:06,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:06,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1435207764, now seen corresponding path program 4 times [2022-07-19 10:18:06,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:06,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943969851] [2022-07-19 10:18:06,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:06,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:07,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943969851] [2022-07-19 10:18:07,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943969851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:07,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137930980] [2022-07-19 10:18:07,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:18:07,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:07,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:07,026 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:07,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 10:18:07,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:18:07,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:07,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 10:18:07,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:07,128 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 [2022-07-19 10:18:07,153 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:07,154 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 [2022-07-19 10:18:07,176 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:07,176 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 [2022-07-19 10:18:07,210 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 [2022-07-19 10:18:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:07,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:31,446 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_67| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_67|)) (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|)) (<= 0 (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))))))) is different from false [2022-07-19 10:18:31,455 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 30 treesize of output 28 [2022-07-19 10:18:31,462 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 3242 treesize of output 3178 [2022-07-19 10:18:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-19 10:18:37,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137930980] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:37,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:37,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 27 [2022-07-19 10:18:37,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592653416] [2022-07-19 10:18:37,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:37,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 10:18:37,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:37,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 10:18:37,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=544, Unknown=19, NotChecked=48, Total=702 [2022-07-19 10:18:37,404 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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) [2022-07-19 10:18:39,440 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_67| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_67|)) (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|)) (<= 0 (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))))))) (<= 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|))) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 2) (<= 1 |c_ULTIMATE.start_main_~j~0#1|)) is different from false [2022-07-19 10:18:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:39,562 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2022-07-19 10:18:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 10:18:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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) Word has length 27 [2022-07-19 10:18:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:39,562 INFO L225 Difference]: With dead ends: 58 [2022-07-19 10:18:39,563 INFO L226 Difference]: Without dead ends: 56 [2022-07-19 10:18:39,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 35 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=177, Invalid=803, Unknown=20, NotChecked=122, Total=1122 [2022-07-19 10:18:39,563 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:39,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 81 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 235 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-07-19 10:18:39,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-19 10:18:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2022-07-19 10:18:39,567 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) [2022-07-19 10:18:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-07-19 10:18:39,567 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 27 [2022-07-19 10:18:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:39,567 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-07-19 10:18:39,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 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) [2022-07-19 10:18:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-07-19 10:18:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 10:18:39,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:39,568 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:39,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:39,775 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 [2022-07-19 10:18:39,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:39,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:39,776 INFO L85 PathProgramCache]: Analyzing trace with hash 2053274844, now seen corresponding path program 5 times [2022-07-19 10:18:39,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:39,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807251441] [2022-07-19 10:18:39,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:39,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:39,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:40,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:40,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807251441] [2022-07-19 10:18:40,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807251441] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:40,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054928316] [2022-07-19 10:18:40,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:18:40,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:40,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:40,028 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:40,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 10:18:40,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 10:18:40,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:40,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 10:18:40,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:40,180 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 [2022-07-19 10:18:40,259 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 [2022-07-19 10:18:40,275 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:40,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:40,357 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 16 treesize of output 14 [2022-07-19 10:18:40,359 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 32 treesize of output 28 [2022-07-19 10:18:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:40,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054928316] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:40,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:40,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 36 [2022-07-19 10:18:40,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117531173] [2022-07-19 10:18:40,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:40,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 10:18:40,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:40,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 10:18:40,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 10:18:40,543 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) [2022-07-19 10:18:40,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:40,879 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2022-07-19 10:18:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 10:18:40,879 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 [2022-07-19 10:18:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:40,880 INFO L225 Difference]: With dead ends: 62 [2022-07-19 10:18:40,880 INFO L226 Difference]: Without dead ends: 46 [2022-07-19 10:18:40,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 10:18:40,881 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:40,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 233 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 407 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-07-19 10:18:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-19 10:18:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-19 10:18:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:18:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-07-19 10:18:40,884 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 28 [2022-07-19 10:18:40,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:40,884 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-07-19 10:18:40,884 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) [2022-07-19 10:18:40,885 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-07-19 10:18:40,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 10:18:40,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:40,885 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:40,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:41,085 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 [2022-07-19 10:18:41,086 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:41,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash -272988574, now seen corresponding path program 6 times [2022-07-19 10:18:41,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:41,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10944132] [2022-07-19 10:18:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:41,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:41,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:41,310 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:41,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:41,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10944132] [2022-07-19 10:18:41,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10944132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:41,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608967217] [2022-07-19 10:18:41,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:18:41,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:41,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:41,312 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:41,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 10:18:41,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 10:18:41,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:18:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 10:18:41,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:41,473 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 [2022-07-19 10:18:41,513 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:41,514 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 [2022-07-19 10:18:41,598 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 [2022-07-19 10:18:41,615 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:41,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:43,729 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_84| Int)) (or (forall ((v_ArrVal_227 Int)) (<= 0 (select (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_84| 4)) v_ArrVal_227) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_84|)))) is different from false [2022-07-19 10:18:43,734 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 23 treesize of output 21 [2022-07-19 10:18:43,736 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 82 treesize of output 78 [2022-07-19 10:18:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-19 10:18:43,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608967217] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:43,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:43,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 41 [2022-07-19 10:18:43,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941908963] [2022-07-19 10:18:43,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:43,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 10:18:43,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 10:18:43,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1405, Unknown=1, NotChecked=76, Total=1640 [2022-07-19 10:18:43,916 INFO L87 Difference]: Start difference. First operand 46 states and 52 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) [2022-07-19 10:18:45,989 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (= (+ .cse0 |c_ULTIMATE.start_main_~#a~0#1.offset| (- 12)) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_84| Int)) (or (forall ((v_ArrVal_227 Int)) (<= 0 (select (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_84| 4)) v_ArrVal_227) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_84|)))) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#a~0#1.offset|))))) is different from false [2022-07-19 10:18:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:18:46,197 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-07-19 10:18:46,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 10:18:46,198 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 [2022-07-19 10:18:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:18:46,198 INFO L225 Difference]: With dead ends: 68 [2022-07-19 10:18:46,198 INFO L226 Difference]: Without dead ends: 66 [2022-07-19 10:18:46,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=234, Invalid=1934, Unknown=2, NotChecked=182, Total=2352 [2022-07-19 10:18:46,199 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:18:46,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 231 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 298 Invalid, 0 Unknown, 175 Unchecked, 0.1s Time] [2022-07-19 10:18:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-19 10:18:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2022-07-19 10:18:46,203 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) [2022-07-19 10:18:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-19 10:18:46,203 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 31 [2022-07-19 10:18:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:18:46,204 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-19 10:18:46,204 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) [2022-07-19 10:18:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-19 10:18:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 10:18:46,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:18:46,211 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-19 10:18:46,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 10:18:46,427 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 [2022-07-19 10:18:46,428 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:18:46,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:18:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1605814044, now seen corresponding path program 7 times [2022-07-19 10:18:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:18:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148015105] [2022-07-19 10:18:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:18:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:18:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:46,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:18:46,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148015105] [2022-07-19 10:18:46,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148015105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:18:46,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422823197] [2022-07-19 10:18:46,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:18:46,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:18:46,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:18:46,726 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:18:46,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 10:18:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:18:46,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 10:18:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:18:46,896 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 [2022-07-19 10:18:46,939 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:46,939 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 [2022-07-19 10:18:46,969 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:18:46,969 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 [2022-07-19 10:18:47,057 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 [2022-07-19 10:18:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 2 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:18:47,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:18:49,186 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_95| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_95|)) (forall ((v_ArrVal_261 Int)) (<= 0 (select (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_95| 4)) v_ArrVal_261) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12)))))) is different from false [2022-07-19 10:18:55,848 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_96| Int)) (or (forall ((v_ArrVal_261 Int) (|v_ULTIMATE.start_main_~i~0#1_95| Int) (v_ArrVal_259 Int)) (or (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_96| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_259) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_95| 4)) v_ArrVal_261) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_96| 1) |v_ULTIMATE.start_main_~i~0#1_95|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_96|)))) is different from false [2022-07-19 10:18:55,857 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 30 treesize of output 28 [2022-07-19 10:18:55,860 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 182 treesize of output 178 [2022-07-19 10:18:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-07-19 10:18:56,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422823197] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:18:56,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:18:56,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 45 [2022-07-19 10:18:56,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251090436] [2022-07-19 10:18:56,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:18:56,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 10:18:56,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:18:56,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 10:18:56,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1624, Unknown=13, NotChecked=166, Total=1980 [2022-07-19 10:18:56,103 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 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) [2022-07-19 10:18:58,173 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|))) (and (<= .cse0 12) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (<= 3 |c_ULTIMATE.start_main_~j~0#1|) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_96| Int)) (or (forall ((v_ArrVal_261 Int) (|v_ULTIMATE.start_main_~i~0#1_95| Int) (v_ArrVal_259 Int)) (or (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_96| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_259) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_95| 4)) v_ArrVal_261) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_96| 1) |v_ULTIMATE.start_main_~i~0#1_95|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_96|)))) (<= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) .cse0)))) is different from false [2022-07-19 10:19:00,195 WARN L833 $PredicateComparison]: unable to prove that (and (<= (+ (div (+ (* (- 1) |c_ULTIMATE.start_main_~#a~0#1.offset|) 12) 4) 1) |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_95| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_95|)) (forall ((v_ArrVal_261 Int)) (<= 0 (select (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_95| 4)) v_ArrVal_261) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 12)))))) (<= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) 12)) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0)) is different from false [2022-07-19 10:19:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:00,523 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2022-07-19 10:19:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 10:19:00,524 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 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 [2022-07-19 10:19:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:00,524 INFO L225 Difference]: With dead ends: 66 [2022-07-19 10:19:00,524 INFO L226 Difference]: Without dead ends: 64 [2022-07-19 10:19:00,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=323, Invalid=2330, Unknown=15, NotChecked=412, Total=3080 [2022-07-19 10:19:00,526 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:00,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 159 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 423 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-07-19 10:19:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-19 10:19:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2022-07-19 10:19:00,530 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) [2022-07-19 10:19:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2022-07-19 10:19:00,531 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 34 [2022-07-19 10:19:00,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:00,531 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2022-07-19 10:19:00,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 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) [2022-07-19 10:19:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2022-07-19 10:19:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 10:19:00,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:00,532 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:00,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:00,735 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 [2022-07-19 10:19:00,736 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:00,736 INFO L85 PathProgramCache]: Analyzing trace with hash -246527464, now seen corresponding path program 8 times [2022-07-19 10:19:00,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:00,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611920614] [2022-07-19 10:19:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:00,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:01,001 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:19:01,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:01,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611920614] [2022-07-19 10:19:01,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611920614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:01,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238950453] [2022-07-19 10:19:01,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:19:01,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:01,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:01,006 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) [2022-07-19 10:19:01,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 10:19:01,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:19:01,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:01,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 10:19:01,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:01,135 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 [2022-07-19 10:19:01,361 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:19:01,362 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 23 treesize of output 10 [2022-07-19 10:19:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:19:01,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:01,613 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 [2022-07-19 10:19:01,616 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 38 treesize of output 32 [2022-07-19 10:19:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:19:01,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238950453] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:01,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:01,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-07-19 10:19:01,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471817417] [2022-07-19 10:19:01,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:01,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 10:19:01,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:01,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 10:19:01,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1328, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 10:19:01,902 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:19:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:02,061 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-07-19 10:19:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 10:19:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 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 [2022-07-19 10:19:02,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:02,062 INFO L225 Difference]: With dead ends: 70 [2022-07-19 10:19:02,062 INFO L226 Difference]: Without dead ends: 50 [2022-07-19 10:19:02,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 10:19:02,063 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:02,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 120 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 205 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-07-19 10:19:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-19 10:19:02,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-19 10:19:02,066 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) [2022-07-19 10:19:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-07-19 10:19:02,067 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 35 [2022-07-19 10:19:02,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:02,067 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-07-19 10:19:02,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 40 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:19:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-07-19 10:19:02,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 10:19:02,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:02,067 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:02,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:02,268 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 [2022-07-19 10:19:02,268 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:02,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:02,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1821925934, now seen corresponding path program 9 times [2022-07-19 10:19:02,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:02,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125029521] [2022-07-19 10:19:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:02,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:19:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:02,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125029521] [2022-07-19 10:19:02,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125029521] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:02,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70718242] [2022-07-19 10:19:02,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:19:02,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:02,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:02,464 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) [2022-07-19 10:19:02,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 10:19:02,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 10:19:02,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:02,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 10:19:02,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:02,580 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 [2022-07-19 10:19:02,620 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:19:02,620 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 27 treesize of output 26 [2022-07-19 10:19:02,724 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 [2022-07-19 10:19:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:19:02,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:04,891 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_118| Int)) (or (forall ((v_ArrVal_320 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_118| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_320) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_118|)))) is different from false [2022-07-19 10:19:04,896 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 23 treesize of output 21 [2022-07-19 10:19:04,898 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 186 treesize of output 178 [2022-07-19 10:19:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-07-19 10:19:05,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70718242] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:05,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:05,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 39 [2022-07-19 10:19:05,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589043383] [2022-07-19 10:19:05,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:05,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 10:19:05,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:05,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 10:19:05,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1282, Unknown=1, NotChecked=72, Total=1482 [2022-07-19 10:19:05,129 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:19:07,236 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_118| Int)) (or (forall ((v_ArrVal_320 Int)) (<= 0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_118| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_320) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_118|)))) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= 6 |c_ULTIMATE.start_main_~j~0#1|) (<= 4 |c_ULTIMATE.start_main_~i~0#1|) (<= 6 (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 [2022-07-19 10:19:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:19:07,418 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-07-19 10:19:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 10:19:07,418 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 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 [2022-07-19 10:19:07,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:19:07,419 INFO L225 Difference]: With dead ends: 76 [2022-07-19 10:19:07,419 INFO L226 Difference]: Without dead ends: 74 [2022-07-19 10:19:07,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=188, Invalid=1798, Unknown=2, NotChecked=174, Total=2162 [2022-07-19 10:19:07,420 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 36 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:19:07,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 267 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 454 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-07-19 10:19:07,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-19 10:19:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2022-07-19 10:19:07,425 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) [2022-07-19 10:19:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2022-07-19 10:19:07,426 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 38 [2022-07-19 10:19:07,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:19:07,426 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2022-07-19 10:19:07,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:19:07,426 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2022-07-19 10:19:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 10:19:07,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:19:07,427 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-07-19 10:19:07,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 10:19:07,637 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 [2022-07-19 10:19:07,637 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:19:07,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:19:07,638 INFO L85 PathProgramCache]: Analyzing trace with hash 884864984, now seen corresponding path program 10 times [2022-07-19 10:19:07,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:19:07,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951733767] [2022-07-19 10:19:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:19:07,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:19:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:19:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:19:07,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:19:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951733767] [2022-07-19 10:19:07,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951733767] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:19:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568563088] [2022-07-19 10:19:07,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:19:07,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:19:07,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:19:07,856 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) [2022-07-19 10:19:07,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 10:19:07,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:19:07,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:19:07,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-19 10:19:07,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:19:07,951 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 [2022-07-19 10:19:07,982 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:19:07,983 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 [2022-07-19 10:19:08,011 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:19:08,011 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 [2022-07-19 10:19:08,114 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 [2022-07-19 10:19:08,131 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:19:08,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:19:56,941 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_132| Int)) (or (forall ((v_ArrVal_357 Int) (v_ArrVal_356 Int) (|v_ULTIMATE.start_main_~i~0#1_131| Int)) (or (<= 0 (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_132| 4)) v_ArrVal_356) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_131| 4)) v_ArrVal_357) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_132| 1) |v_ULTIMATE.start_main_~i~0#1_131|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_132|)))) is different from false [2022-07-19 10:19:56,949 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 30 treesize of output 28 [2022-07-19 10:19:56,951 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 794 treesize of output 778 [2022-07-19 10:19:57,773 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-19 10:19:57,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568563088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:19:57,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:19:57,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 42 [2022-07-19 10:19:57,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765647542] [2022-07-19 10:19:57,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:19:57,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 10:19:57,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:19:57,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 10:19:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1458, Unknown=40, NotChecked=78, Total=1722 [2022-07-19 10:19:57,775 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:19:59,840 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_132| Int)) (or (forall ((v_ArrVal_357 Int) (v_ArrVal_356 Int) (|v_ULTIMATE.start_main_~i~0#1_131| Int)) (or (<= 0 (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_132| 4)) v_ArrVal_356) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_131| 4)) v_ArrVal_357) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 16))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_132| 1) |v_ULTIMATE.start_main_~i~0#1_131|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_132|)))) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (<= 6 |c_ULTIMATE.start_main_~j~0#1|) (<= 4 |c_ULTIMATE.start_main_~i~0#1|) (<= 6 (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 [2022-07-19 10:20:00,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:00,093 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-07-19 10:20:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 10:20:00,093 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 10:20:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:00,094 INFO L225 Difference]: With dead ends: 74 [2022-07-19 10:20:00,094 INFO L226 Difference]: Without dead ends: 72 [2022-07-19 10:20:00,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 54 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 51.3s TimeCoverageRelationStatistics Valid=290, Invalid=2227, Unknown=41, NotChecked=198, Total=2756 [2022-07-19 10:20:00,095 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:00,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 162 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 514 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-07-19 10:20:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-19 10:20:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-07-19 10:20:00,102 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) [2022-07-19 10:20:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-07-19 10:20:00,103 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 41 [2022-07-19 10:20:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:00,103 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-07-19 10:20:00,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 42 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-07-19 10:20:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 10:20:00,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:00,104 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:00,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:00,318 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 [2022-07-19 10:20:00,319 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:00,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:00,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1086466440, now seen corresponding path program 11 times [2022-07-19 10:20:00,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:00,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292526664] [2022-07-19 10:20:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:00,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:00,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:00,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292526664] [2022-07-19 10:20:00,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292526664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:00,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265225318] [2022-07-19 10:20:00,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:20:00,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:00,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:00,584 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) [2022-07-19 10:20:00,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 10:20:00,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-19 10:20:00,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:00,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 10:20:00,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:00,832 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 [2022-07-19 10:20:00,979 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 [2022-07-19 10:20:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:00,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:01,113 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 16 treesize of output 14 [2022-07-19 10:20:01,120 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 32 treesize of output 28 [2022-07-19 10:20:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:01,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265225318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:01,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:01,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 53 [2022-07-19 10:20:01,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034489354] [2022-07-19 10:20:01,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:01,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 10:20:01,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 10:20:01,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=2557, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 10:20:01,441 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 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) [2022-07-19 10:20:02,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:02,055 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2022-07-19 10:20:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 10:20:02,056 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 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 [2022-07-19 10:20:02,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:02,056 INFO L225 Difference]: With dead ends: 81 [2022-07-19 10:20:02,056 INFO L226 Difference]: Without dead ends: 54 [2022-07-19 10:20:02,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=349, Invalid=4073, Unknown=0, NotChecked=0, Total=4422 [2022-07-19 10:20:02,058 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:02,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 407 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 644 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-07-19 10:20:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-19 10:20:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-19 10:20:02,063 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) [2022-07-19 10:20:02,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-07-19 10:20:02,063 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 42 [2022-07-19 10:20:02,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:02,063 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-07-19 10:20:02,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 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) [2022-07-19 10:20:02,063 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-07-19 10:20:02,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 10:20:02,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:02,064 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:02,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:02,264 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 [2022-07-19 10:20:02,264 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:02,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1001394318, now seen corresponding path program 12 times [2022-07-19 10:20:02,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:02,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268427174] [2022-07-19 10:20:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:02,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:02,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268427174] [2022-07-19 10:20:02,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268427174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:02,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113705560] [2022-07-19 10:20:02,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:20:02,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:02,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:02,501 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) [2022-07-19 10:20:02,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 10:20:02,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-19 10:20:02,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:02,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-19 10:20:02,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:02,664 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 [2022-07-19 10:20:02,708 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:20:02,709 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 27 treesize of output 26 [2022-07-19 10:20:02,856 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 [2022-07-19 10:20:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:02,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:04,995 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_157| Int)) (or (forall ((v_ArrVal_423 Int)) (<= 0 (select (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_157| 4)) v_ArrVal_423) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_157|)))) is different from false [2022-07-19 10:20:05,000 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 23 treesize of output 21 [2022-07-19 10:20:05,001 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 186 treesize of output 178 [2022-07-19 10:20:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-19 10:20:05,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113705560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:05,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:05,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 46 [2022-07-19 10:20:05,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710591183] [2022-07-19 10:20:05,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:05,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 10:20:05,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:05,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 10:20:05,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1831, Unknown=1, NotChecked=86, Total=2070 [2022-07-19 10:20:05,249 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 46 states, 46 states have (on average 2.347826086956522) internal successors, (108), 46 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:07,454 WARN L833 $PredicateComparison]: unable to prove that (and (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= 10 (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|))) (<= 10 |c_ULTIMATE.start_main_~j~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 5) (forall ((|v_ULTIMATE.start_main_~i~0#1_157| Int)) (or (forall ((v_ArrVal_423 Int)) (<= 0 (select (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_157| 4)) v_ArrVal_423) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_157|))))) is different from false [2022-07-19 10:20:07,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:07,749 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2022-07-19 10:20:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 10:20:07,750 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.347826086956522) internal successors, (108), 46 states have internal predecessors, (108), 0 states have call successors, (0), 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 [2022-07-19 10:20:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:07,750 INFO L225 Difference]: With dead ends: 84 [2022-07-19 10:20:07,750 INFO L226 Difference]: Without dead ends: 82 [2022-07-19 10:20:07,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=223, Invalid=2539, Unknown=2, NotChecked=206, Total=2970 [2022-07-19 10:20:07,751 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:07,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 512 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 950 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-07-19 10:20:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-19 10:20:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2022-07-19 10:20:07,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2022-07-19 10:20:07,757 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 45 [2022-07-19 10:20:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:07,757 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2022-07-19 10:20:07,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.347826086956522) internal successors, (108), 46 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:07,757 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2022-07-19 10:20:07,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 10:20:07,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:07,758 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:07,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-19 10:20:07,962 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 [2022-07-19 10:20:07,962 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:07,963 INFO L85 PathProgramCache]: Analyzing trace with hash 648512456, now seen corresponding path program 13 times [2022-07-19 10:20:07,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:07,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236510465] [2022-07-19 10:20:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:07,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:08,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236510465] [2022-07-19 10:20:08,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236510465] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:08,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972546433] [2022-07-19 10:20:08,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:20:08,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:08,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:08,268 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) [2022-07-19 10:20:08,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 10:20:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:08,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 10:20:08,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:08,386 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 [2022-07-19 10:20:08,416 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:20:08,417 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 [2022-07-19 10:20:08,446 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:20:08,446 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 [2022-07-19 10:20:08,566 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 [2022-07-19 10:20:08,585 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:08,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:10,754 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_172| Int)) (or (forall ((v_ArrVal_466 Int)) (<= 0 (select (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_172| 4)) v_ArrVal_466) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_172|)))) is different from false [2022-07-19 10:20:23,132 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_173| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_173|)) (forall ((v_ArrVal_466 Int) (v_ArrVal_464 Int) (|v_ULTIMATE.start_main_~i~0#1_172| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_173| 1) |v_ULTIMATE.start_main_~i~0#1_172|)) (<= 0 (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_173| 4)) v_ArrVal_464) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_172| 4)) v_ArrVal_466) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20))))))) is different from false [2022-07-19 10:20:23,138 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 30 treesize of output 28 [2022-07-19 10:20:23,140 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 182 treesize of output 178 [2022-07-19 10:20:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 13 not checked. [2022-07-19 10:20:23,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972546433] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:23,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:23,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 49 [2022-07-19 10:20:23,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488617830] [2022-07-19 10:20:23,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:23,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 10:20:23,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 10:20:23,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1976, Unknown=27, NotChecked=182, Total=2352 [2022-07-19 10:20:23,485 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 49 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:25,639 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_173| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_173|)) (forall ((v_ArrVal_466 Int) (v_ArrVal_464 Int) (|v_ULTIMATE.start_main_~i~0#1_172| Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_173| 1) |v_ULTIMATE.start_main_~i~0#1_172|)) (<= 0 (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_173| 4)) v_ArrVal_464) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_172| 4)) v_ArrVal_466) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20))))))) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= 10 (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|))) (<= 10 |c_ULTIMATE.start_main_~j~0#1|) (<= |c_ULTIMATE.start_main_~i~0#1| 5)) is different from false [2022-07-19 10:20:27,659 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_172| Int)) (or (forall ((v_ArrVal_466 Int)) (<= 0 (select (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_172| 4)) v_ArrVal_466) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_172|)))) (<= 6 |c_ULTIMATE.start_main_~i~0#1|) (<= 10 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) is different from false [2022-07-19 10:20:29,679 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_172| Int)) (or (forall ((v_ArrVal_466 Int)) (<= 0 (select (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_172| 4)) v_ArrVal_466) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_172|)))) (<= 10 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 20))) (<= 7 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2022-07-19 10:20:29,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:29,995 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-07-19 10:20:29,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 10:20:29,995 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-19 10:20:29,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:29,996 INFO L225 Difference]: With dead ends: 82 [2022-07-19 10:20:29,996 INFO L226 Difference]: Without dead ends: 80 [2022-07-19 10:20:29,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=332, Invalid=3080, Unknown=30, NotChecked=590, Total=4032 [2022-07-19 10:20:29,997 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:29,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 260 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 782 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-07-19 10:20:29,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-19 10:20:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 58. [2022-07-19 10:20:30,003 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) [2022-07-19 10:20:30,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2022-07-19 10:20:30,003 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 48 [2022-07-19 10:20:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:30,003 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2022-07-19 10:20:30,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.326530612244898) internal successors, (114), 49 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2022-07-19 10:20:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 10:20:30,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:30,004 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:30,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:30,215 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 [2022-07-19 10:20:30,215 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash -707076540, now seen corresponding path program 14 times [2022-07-19 10:20:30,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:30,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569382073] [2022-07-19 10:20:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:30,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 24 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:30,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:30,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569382073] [2022-07-19 10:20:30,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569382073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:30,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84328810] [2022-07-19 10:20:30,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:20:30,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:30,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:30,591 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) [2022-07-19 10:20:30,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 10:20:30,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:20:30,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:30,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 10:20:30,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:30,901 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 [2022-07-19 10:20:31,276 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:20:31,277 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 23 treesize of output 10 [2022-07-19 10:20:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:31,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:31,922 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 [2022-07-19 10:20:31,924 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 38 treesize of output 32 [2022-07-19 10:20:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 40 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:32,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84328810] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:32,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:32,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 62 [2022-07-19 10:20:32,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304892612] [2022-07-19 10:20:32,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:32,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-19 10:20:32,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:32,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-19 10:20:32,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=3191, Unknown=1, NotChecked=0, Total=3782 [2022-07-19 10:20:32,416 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 62 states, 62 states have (on average 2.2580645161290325) internal successors, (140), 62 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:32,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:32,667 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2022-07-19 10:20:32,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 10:20:32,669 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2580645161290325) internal successors, (140), 62 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-19 10:20:32,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:32,672 INFO L225 Difference]: With dead ends: 83 [2022-07-19 10:20:32,672 INFO L226 Difference]: Without dead ends: 58 [2022-07-19 10:20:32,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=726, Invalid=4103, Unknown=1, NotChecked=0, Total=4830 [2022-07-19 10:20:32,674 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:32,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 197 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 277 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-07-19 10:20:32,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-19 10:20:32,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-19 10:20:32,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-07-19 10:20:32,680 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 49 [2022-07-19 10:20:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:32,680 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-07-19 10:20:32,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2580645161290325) internal successors, (140), 62 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-07-19 10:20:32,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 10:20:32,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:32,681 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:32,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-19 10:20:32,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:32,896 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:32,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:32,896 INFO L85 PathProgramCache]: Analyzing trace with hash -988666754, now seen corresponding path program 15 times [2022-07-19 10:20:32,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:32,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485197617] [2022-07-19 10:20:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:32,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:33,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:33,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485197617] [2022-07-19 10:20:33,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485197617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:33,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214466788] [2022-07-19 10:20:33,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:20:33,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:33,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:33,245 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:33,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 10:20:33,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-19 10:20:33,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 10:20:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:33,419 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 [2022-07-19 10:20:33,453 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:20:33,454 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 27 treesize of output 26 [2022-07-19 10:20:33,575 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 [2022-07-19 10:20:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:33,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:35,750 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_203| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_203|)) (forall ((v_ArrVal_540 Int)) (<= 0 (select (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_203| 4)) v_ArrVal_540) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24)))))) is different from false [2022-07-19 10:20:35,755 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 23 treesize of output 21 [2022-07-19 10:20:35,757 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 82 treesize of output 78 [2022-07-19 10:20:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-07-19 10:20:36,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214466788] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:36,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:36,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 53 [2022-07-19 10:20:36,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317038182] [2022-07-19 10:20:36,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:36,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 10:20:36,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:36,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 10:20:36,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2478, Unknown=1, NotChecked=100, Total=2756 [2022-07-19 10:20:36,184 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:38,345 WARN L833 $PredicateComparison]: unable to prove that (and (<= 6 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_203| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_203|)) (forall ((v_ArrVal_540 Int)) (<= 0 (select (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_203| 4)) v_ArrVal_540) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24)))))) (<= 15 |c_ULTIMATE.start_main_~j~0#1|) (<= 15 (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|))) (<= |c_ULTIMATE.start_main_~i~0#1| 6)) is different from false [2022-07-19 10:20:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:20:38,655 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-07-19 10:20:38,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 10:20:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 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 52 [2022-07-19 10:20:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:20:38,656 INFO L225 Difference]: With dead ends: 92 [2022-07-19 10:20:38,656 INFO L226 Difference]: Without dead ends: 90 [2022-07-19 10:20:38,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=256, Invalid=3410, Unknown=2, NotChecked=238, Total=3906 [2022-07-19 10:20:38,657 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:20:38,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 567 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 750 Invalid, 0 Unknown, 459 Unchecked, 0.3s Time] [2022-07-19 10:20:38,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-19 10:20:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2022-07-19 10:20:38,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:38,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-07-19 10:20:38,665 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 52 [2022-07-19 10:20:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:20:38,665 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-07-19 10:20:38,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.3773584905660377) internal successors, (126), 53 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:20:38,666 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-07-19 10:20:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 10:20:38,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:20:38,666 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-07-19 10:20:38,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 10:20:38,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 10:20:38,872 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:20:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:20:38,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1771602940, now seen corresponding path program 16 times [2022-07-19 10:20:38,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:20:38,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426643232] [2022-07-19 10:20:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:20:38,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:20:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:20:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:39,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:20:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426643232] [2022-07-19 10:20:39,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426643232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:20:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371633242] [2022-07-19 10:20:39,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:20:39,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:20:39,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:20:39,270 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:20:39,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 10:20:39,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:20:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:20:39,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-19 10:20:39,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:20:39,410 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 [2022-07-19 10:20:39,440 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:20:39,440 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 [2022-07-19 10:20:39,469 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:20:39,469 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 [2022-07-19 10:20:39,623 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 [2022-07-19 10:20:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 2 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:20:39,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:20:41,859 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_220| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_220|)) (forall ((v_ArrVal_586 Int)) (<= 0 (select (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_220| 4)) v_ArrVal_586) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24)))))) is different from false [2022-07-19 10:20:56,543 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_221| Int)) (or (forall ((v_ArrVal_586 Int) (|v_ULTIMATE.start_main_~i~0#1_220| Int) (v_ArrVal_583 Int)) (or (<= 0 (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_221| 4)) v_ArrVal_583) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_220| 4)) v_ArrVal_586) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_221| 1) |v_ULTIMATE.start_main_~i~0#1_220|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_221|)))) is different from false [2022-07-19 10:20:56,550 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 30 treesize of output 28 [2022-07-19 10:20:56,553 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 1610 treesize of output 1578 [2022-07-19 10:20:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 15 not checked. [2022-07-19 10:20:58,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371633242] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:20:58,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:20:58,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 56 [2022-07-19 10:20:58,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622017195] [2022-07-19 10:20:58,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:20:58,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-19 10:20:58,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:20:58,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-19 10:20:58,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=2645, Unknown=33, NotChecked=210, Total=3080 [2022-07-19 10:20:58,116 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 56 states, 56 states have (on average 2.357142857142857) internal successors, (132), 56 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:00,308 WARN L833 $PredicateComparison]: unable to prove that (and (<= 6 |c_ULTIMATE.start_main_~i~0#1|) (<= 15 |c_ULTIMATE.start_main_~j~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_221| Int)) (or (forall ((v_ArrVal_586 Int) (|v_ULTIMATE.start_main_~i~0#1_220| Int) (v_ArrVal_583 Int)) (or (<= 0 (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_221| 4)) v_ArrVal_583) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_220| 4)) v_ArrVal_586) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_221| 1) |v_ULTIMATE.start_main_~i~0#1_220|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_221|)))) (<= 15 (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|))) (<= |c_ULTIMATE.start_main_~i~0#1| 6)) is different from false [2022-07-19 10:21:02,330 WARN L833 $PredicateComparison]: unable to prove that (and (<= 15 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24))) (<= 7 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_220| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_220|)) (forall ((v_ArrVal_586 Int)) (<= 0 (select (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_220| 4)) v_ArrVal_586) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 24))))))) is different from false [2022-07-19 10:21:02,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:21:02,775 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2022-07-19 10:21:02,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 10:21:02,776 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.357142857142857) internal successors, (132), 56 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-07-19 10:21:02,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:21:02,776 INFO L225 Difference]: With dead ends: 90 [2022-07-19 10:21:02,776 INFO L226 Difference]: Without dead ends: 88 [2022-07-19 10:21:02,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=382, Invalid=4155, Unknown=35, NotChecked=540, Total=5112 [2022-07-19 10:21:02,777 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:21:02,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 359 Invalid, 1190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1016 Invalid, 0 Unknown, 114 Unchecked, 0.4s Time] [2022-07-19 10:21:02,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-19 10:21:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2022-07-19 10:21:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-07-19 10:21:02,785 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 55 [2022-07-19 10:21:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:21:02,786 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-07-19 10:21:02,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.357142857142857) internal successors, (132), 56 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-07-19 10:21:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 10:21:02,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:21:02,786 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-07-19 10:21:02,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 10:21:02,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-19 10:21:02,987 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:21:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:21:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash -147752396, now seen corresponding path program 17 times [2022-07-19 10:21:02,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:21:02,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714421198] [2022-07-19 10:21:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:21:02,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:21:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:21:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:03,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:21:03,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714421198] [2022-07-19 10:21:03,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714421198] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:21:03,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651289834] [2022-07-19 10:21:03,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 10:21:03,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:21:03,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:21:03,327 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:21:03,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 10:21:03,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-19 10:21:03,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:21:03,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 10:21:03,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:21:03,487 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 [2022-07-19 10:21:03,697 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 [2022-07-19 10:21:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:03,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:21:03,934 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 16 treesize of output 14 [2022-07-19 10:21:03,936 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 32 treesize of output 28 [2022-07-19 10:21:04,430 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:04,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651289834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:21:04,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:21:04,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 56 [2022-07-19 10:21:04,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014252935] [2022-07-19 10:21:04,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:21:04,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-19 10:21:04,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:21:04,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-19 10:21:04,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2894, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 10:21:04,432 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:04,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:21:04,979 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2022-07-19 10:21:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 10:21:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 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 56 [2022-07-19 10:21:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:21:04,980 INFO L225 Difference]: With dead ends: 100 [2022-07-19 10:21:04,980 INFO L226 Difference]: Without dead ends: 98 [2022-07-19 10:21:04,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=279, Invalid=4143, Unknown=0, NotChecked=0, Total=4422 [2022-07-19 10:21:04,981 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 36 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 338 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 10:21:04,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 589 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 881 Invalid, 0 Unknown, 338 Unchecked, 0.3s Time] [2022-07-19 10:21:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-19 10:21:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 67. [2022-07-19 10:21:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-07-19 10:21:05,003 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 56 [2022-07-19 10:21:05,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:21:05,004 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-07-19 10:21:05,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 56 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-07-19 10:21:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-19 10:21:05,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:21:05,005 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-07-19 10:21:05,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 10:21:05,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:21:05,219 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:21:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:21:05,220 INFO L85 PathProgramCache]: Analyzing trace with hash -412901702, now seen corresponding path program 18 times [2022-07-19 10:21:05,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:21:05,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060339871] [2022-07-19 10:21:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:21:05,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:21:05,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:21:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:05,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:21:05,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060339871] [2022-07-19 10:21:05,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060339871] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:21:05,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464235120] [2022-07-19 10:21:05,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 10:21:05,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:21:05,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:21:05,606 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:21:05,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 10:21:05,731 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-19 10:21:05,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:21:05,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 10:21:05,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:21:05,817 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 [2022-07-19 10:21:05,860 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:21:05,861 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 27 treesize of output 26 [2022-07-19 10:21:06,111 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 [2022-07-19 10:21:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:06,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:21:08,419 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_254| Int)) (or (forall ((v_ArrVal_667 Int)) (<= 0 (select (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_254| 4)) v_ArrVal_667) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_254|)))) is different from false [2022-07-19 10:21:08,424 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 23 treesize of output 21 [2022-07-19 10:21:08,426 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 186 treesize of output 178 [2022-07-19 10:21:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-07-19 10:21:08,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464235120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:21:08,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:21:08,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 60 [2022-07-19 10:21:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477697200] [2022-07-19 10:21:08,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:21:08,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-19 10:21:08,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:21:08,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-19 10:21:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3223, Unknown=1, NotChecked=114, Total=3540 [2022-07-19 10:21:08,954 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 60 states, 60 states have (on average 2.4) internal successors, (144), 60 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:11,166 WARN L833 $PredicateComparison]: unable to prove that (and (<= 7 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_254| Int)) (or (forall ((v_ArrVal_667 Int)) (<= 0 (select (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_254| 4)) v_ArrVal_667) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_254|)))) (<= 21 |c_ULTIMATE.start_main_~j~0#1|) (<= 21 (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|))) (<= |c_ULTIMATE.start_main_~i~0#1| 7)) is different from false [2022-07-19 10:21:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:21:11,629 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2022-07-19 10:21:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 10:21:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.4) internal successors, (144), 60 states have internal predecessors, (144), 0 states have call successors, (0), 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 59 [2022-07-19 10:21:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:21:11,630 INFO L225 Difference]: With dead ends: 128 [2022-07-19 10:21:11,630 INFO L226 Difference]: Without dead ends: 126 [2022-07-19 10:21:11,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=299, Invalid=4537, Unknown=2, NotChecked=274, Total=5112 [2022-07-19 10:21:11,631 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:21:11,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 659 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1372 Invalid, 0 Unknown, 141 Unchecked, 0.4s Time] [2022-07-19 10:21:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-19 10:21:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 68. [2022-07-19 10:21:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-07-19 10:21:11,651 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 59 [2022-07-19 10:21:11,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:21:11,651 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-07-19 10:21:11,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.4) internal successors, (144), 60 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:11,652 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-07-19 10:21:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-19 10:21:11,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:21:11,652 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-07-19 10:21:11,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 10:21:11,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:21:11,866 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:21:11,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:21:11,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1180498710, now seen corresponding path program 19 times [2022-07-19 10:21:11,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:21:11,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82382473] [2022-07-19 10:21:11,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:21:11,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:21:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:21:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 73 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:11,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:21:11,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82382473] [2022-07-19 10:21:11,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82382473] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:21:11,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601418543] [2022-07-19 10:21:11,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 10:21:11,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:21:11,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:21:12,002 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:21:12,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 10:21:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:21:12,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 10:21:12,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:21:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 98 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:12,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:21:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 98 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:12,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601418543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:21:12,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:21:12,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-19 10:21:12,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695758521] [2022-07-19 10:21:12,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:21:12,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 10:21:12,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:21:12,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 10:21:12,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-19 10:21:12,335 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:12,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:21:12,428 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-07-19 10:21:12,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 10:21:12,429 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-19 10:21:12,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:21:12,429 INFO L225 Difference]: With dead ends: 104 [2022-07-19 10:21:12,429 INFO L226 Difference]: Without dead ends: 68 [2022-07-19 10:21:12,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-19 10:21:12,430 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 16 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:21:12,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 161 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:21:12,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-19 10:21:12,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-07-19 10:21:12,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-07-19 10:21:12,440 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 60 [2022-07-19 10:21:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:21:12,440 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-07-19 10:21:12,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.413793103448276) internal successors, (99), 29 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-07-19 10:21:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 10:21:12,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:21:12,441 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-07-19 10:21:12,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 10:21:12,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 10:21:12,654 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:21:12,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:21:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash -302205485, now seen corresponding path program 1 times [2022-07-19 10:21:12,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:21:12,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340646184] [2022-07-19 10:21:12,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:21:12,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:21:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:21:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-19 10:21:12,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:21:12,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340646184] [2022-07-19 10:21:12,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340646184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:21:12,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565996032] [2022-07-19 10:21:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:21:12,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:21:12,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:21:12,768 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:21:12,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 10:21:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:21:12,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 10:21:12,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:21:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-19 10:21:13,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:21:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-19 10:21:13,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565996032] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:21:13,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:21:13,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-07-19 10:21:13,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494574082] [2022-07-19 10:21:13,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:21:13,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 10:21:13,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:21:13,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 10:21:13,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=753, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 10:21:13,255 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 37 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:21:13,559 INFO L93 Difference]: Finished difference Result 508 states and 534 transitions. [2022-07-19 10:21:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 10:21:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-19 10:21:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:21:13,564 INFO L225 Difference]: With dead ends: 508 [2022-07-19 10:21:13,564 INFO L226 Difference]: Without dead ends: 479 [2022-07-19 10:21:13,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=876, Invalid=1380, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 10:21:13,565 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 578 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 10:21:13,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 148 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 10:21:13,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-07-19 10:21:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 103. [2022-07-19 10:21:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 102 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2022-07-19 10:21:13,579 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 61 [2022-07-19 10:21:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:21:13,579 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2022-07-19 10:21:13,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.8378378378378377) internal successors, (105), 36 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:21:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2022-07-19 10:21:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 10:21:13,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:21:13,580 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2022-07-19 10:21:13,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-19 10:21:13,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-19 10:21:13,788 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:21:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:21:13,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1031019404, now seen corresponding path program 20 times [2022-07-19 10:21:13,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:21:13,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794598129] [2022-07-19 10:21:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:21:13,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:21:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:21:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:14,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:21:14,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794598129] [2022-07-19 10:21:14,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794598129] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:21:14,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398293307] [2022-07-19 10:21:14,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 10:21:14,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:21:14,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:21:14,256 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:21:14,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 10:21:14,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 10:21:14,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:21:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 10:21:14,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:21:14,411 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 [2022-07-19 10:21:14,443 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:21:14,444 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 [2022-07-19 10:21:14,485 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-19 10:21:14,485 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 [2022-07-19 10:21:14,685 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 [2022-07-19 10:21:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:21:14,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:22:13,906 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (forall ((v_ArrVal_797 Int) (v_ArrVal_796 Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int)) (or (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_796) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_311| 4)) v_ArrVal_797) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|)))))) is different from false [2022-07-19 10:22:13,912 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 30 treesize of output 28 [2022-07-19 10:22:13,915 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 794 treesize of output 778 [2022-07-19 10:22:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-07-19 10:22:14,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398293307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:22:14,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:22:14,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 63 [2022-07-19 10:22:14,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86515240] [2022-07-19 10:22:14,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:22:14,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-19 10:22:14,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:22:14,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-19 10:22:14,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3512, Unknown=53, NotChecked=120, Total=3906 [2022-07-19 10:22:14,545 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 63 states, 63 states have (on average 2.380952380952381) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:22:16,768 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_312| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_312|)) (forall ((v_ArrVal_797 Int) (v_ArrVal_796 Int) (|v_ULTIMATE.start_main_~i~0#1_311| Int)) (or (<= 0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_312| 4) |c_ULTIMATE.start_main_~#a~0#1.offset|) v_ArrVal_796) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_311| 4)) v_ArrVal_797) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 28))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_312| 1) |v_ULTIMATE.start_main_~i~0#1_311|)))))) (<= 7 |c_ULTIMATE.start_main_~i~0#1|) (<= 21 |c_ULTIMATE.start_main_~j~0#1|) (<= 21 (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|))) (<= |c_ULTIMATE.start_main_~i~0#1| 7)) is different from false [2022-07-19 10:22:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:22:17,302 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2022-07-19 10:22:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 10:22:17,302 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.380952380952381) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 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 62 [2022-07-19 10:22:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:22:17,303 INFO L225 Difference]: With dead ends: 134 [2022-07-19 10:22:17,303 INFO L226 Difference]: Without dead ends: 132 [2022-07-19 10:22:17,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 90 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 62.4s TimeCoverageRelationStatistics Valid=438, Invalid=5522, Unknown=54, NotChecked=306, Total=6320 [2022-07-19 10:22:17,308 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 10:22:17,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 494 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1324 Invalid, 0 Unknown, 102 Unchecked, 0.4s Time] [2022-07-19 10:22:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-19 10:22:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 102. [2022-07-19 10:22:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 101 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:22:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2022-07-19 10:22:17,321 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 62 [2022-07-19 10:22:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:22:17,322 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2022-07-19 10:22:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.380952380952381) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:22:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2022-07-19 10:22:17,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 10:22:17,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:22:17,323 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-07-19 10:22:17,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-19 10:22:17,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 10:22:17,529 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:22:17,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:22:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1132689008, now seen corresponding path program 21 times [2022-07-19 10:22:17,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:22:17,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541407293] [2022-07-19 10:22:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:22:17,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:22:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:22:17,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:22:17,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541407293] [2022-07-19 10:22:17,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541407293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:22:17,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010979234] [2022-07-19 10:22:17,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 10:22:17,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:22:17,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:22:17,933 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:22:17,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 10:22:18,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-19 10:22:18,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:22:18,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 10:22:18,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:22:18,161 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 [2022-07-19 10:22:18,541 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-19 10:22:18,541 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 23 treesize of output 10 [2022-07-19 10:22:18,561 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 91 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:22:18,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 10:22:19,254 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 [2022-07-19 10:22:19,256 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 38 treesize of output 32 [2022-07-19 10:22:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 84 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:22:20,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010979234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 10:22:20,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 10:22:20,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 68 [2022-07-19 10:22:20,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407238049] [2022-07-19 10:22:20,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 10:22:20,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-19 10:22:20,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 10:22:20,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-19 10:22:20,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=3953, Unknown=1, NotChecked=0, Total=4556 [2022-07-19 10:22:20,010 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 68 states, 68 states have (on average 2.3970588235294117) internal successors, (163), 68 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:22:20,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 10:22:20,471 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-07-19 10:22:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 10:22:20,471 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.3970588235294117) internal successors, (163), 68 states have internal predecessors, (163), 0 states have call successors, (0), 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 63 [2022-07-19 10:22:20,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 10:22:20,472 INFO L225 Difference]: With dead ends: 138 [2022-07-19 10:22:20,472 INFO L226 Difference]: Without dead ends: 102 [2022-07-19 10:22:20,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=754, Invalid=5407, Unknown=1, NotChecked=0, Total=6162 [2022-07-19 10:22:20,486 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 10:22:20,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 458 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 597 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-07-19 10:22:20,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-19 10:22:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-07-19 10:22:20,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:22:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-07-19 10:22:20,504 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 63 [2022-07-19 10:22:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 10:22:20,504 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-07-19 10:22:20,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.3970588235294117) internal successors, (163), 68 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 10:22:20,505 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-07-19 10:22:20,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 10:22:20,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 10:22:20,505 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2022-07-19 10:22:20,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 10:22:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:22:20,720 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 10:22:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 10:22:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 557731626, now seen corresponding path program 22 times [2022-07-19 10:22:20,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 10:22:20,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282085307] [2022-07-19 10:22:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 10:22:20,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 10:22:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 10:22:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:22:21,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 10:22:21,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282085307] [2022-07-19 10:22:21,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282085307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 10:22:21,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349157240] [2022-07-19 10:22:21,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 10:22:21,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 10:22:21,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 10:22:21,207 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 10:22:21,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 10:22:21,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 10:22:21,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 10:22:21,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-19 10:22:21,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 10:22:21,390 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 [2022-07-19 10:22:21,445 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-19 10:22:21,445 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 27 treesize of output 26 [2022-07-19 10:22:21,721 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 [2022-07-19 10:22:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 10:22:21,747 INFO L328 TraceCheckSpWp]: Computing backward predicates...