./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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-tiling/pnr3.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 e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 21:31:16,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 21:31:16,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 21:31:16,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 21:31:16,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 21:31:16,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 21:31:16,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 21:31:16,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 21:31:16,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 21:31:16,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 21:31:16,974 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 21:31:16,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 21:31:16,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 21:31:16,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 21:31:16,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 21:31:16,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 21:31:16,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 21:31:16,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 21:31:16,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 21:31:16,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 21:31:16,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 21:31:17,008 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 21:31:17,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 21:31:17,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 21:31:17,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 21:31:17,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 21:31:17,013 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 21:31:17,014 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 21:31:17,015 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 21:31:17,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 21:31:17,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 21:31:17,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 21:31:17,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 21:31:17,020 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 21:31:17,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 21:31:17,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 21:31:17,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 21:31:17,026 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 21:31:17,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 21:31:17,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 21:31:17,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 21:31:17,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 21:31:17,083 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 21:31:17,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 21:31:17,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 21:31:17,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 21:31:17,099 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 21:31:17,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 21:31:17,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 21:31:17,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 21:31:17,101 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 21:31:17,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 21:31:17,102 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 21:31:17,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 21:31:17,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 21:31:17,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 21:31:17,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 21:31:17,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 21:31:17,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 21:31:17,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 21:31:17,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 21:31:17,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 21:31:17,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 21:31:17,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 21:31:17,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 21:31:17,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 21:31:17,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:31:17,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 21:31:17,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 21:31:17,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 21:31:17,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 21:31:17,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 21:31:17,104 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 21:31:17,105 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 21:31:17,105 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 21:31:17,105 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2021-12-27 21:31:17,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 21:31:17,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 21:31:17,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 21:31:17,577 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 21:31:17,578 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 21:31:17,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr3.c [2021-12-27 21:31:17,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e96ca0bfe/504ac4876cca4f1eb4142d89a59f3708/FLAG071605b46 [2021-12-27 21:31:18,052 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 21:31:18,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c [2021-12-27 21:31:18,057 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e96ca0bfe/504ac4876cca4f1eb4142d89a59f3708/FLAG071605b46 [2021-12-27 21:31:18,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e96ca0bfe/504ac4876cca4f1eb4142d89a59f3708 [2021-12-27 21:31:18,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 21:31:18,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 21:31:18,073 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 21:31:18,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 21:31:18,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 21:31:18,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b91a0bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18, skipping insertion in model container [2021-12-27 21:31:18,078 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 21:31:18,095 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 21:31:18,227 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-tiling/pnr3.c[395,408] [2021-12-27 21:31:18,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:31:18,258 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 21:31:18,315 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-tiling/pnr3.c[395,408] [2021-12-27 21:31:18,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 21:31:18,344 INFO L208 MainTranslator]: Completed translation [2021-12-27 21:31:18,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18 WrapperNode [2021-12-27 21:31:18,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 21:31:18,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 21:31:18,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 21:31:18,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 21:31:18,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,381 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2021-12-27 21:31:18,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 21:31:18,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 21:31:18,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 21:31:18,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 21:31:18,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,428 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 21:31:18,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 21:31:18,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 21:31:18,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 21:31:18,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (1/1) ... [2021-12-27 21:31:18,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 21:31:18,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:18,476 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) [2021-12-27 21:31:18,544 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 [2021-12-27 21:31:18,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 21:31:18,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 21:31:18,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-27 21:31:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-27 21:31:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2021-12-27 21:31:18,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2021-12-27 21:31:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 21:31:18,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 21:31:18,571 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-27 21:31:18,646 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 21:31:18,647 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 21:31:18,775 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 21:31:18,783 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 21:31:18,789 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-27 21:31:18,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:31:18 BoogieIcfgContainer [2021-12-27 21:31:18,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 21:31:18,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 21:31:18,792 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 21:31:18,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 21:31:18,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 09:31:18" (1/3) ... [2021-12-27 21:31:18,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10802ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:31:18, skipping insertion in model container [2021-12-27 21:31:18,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 09:31:18" (2/3) ... [2021-12-27 21:31:18,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10802ca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 09:31:18, skipping insertion in model container [2021-12-27 21:31:18,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 09:31:18" (3/3) ... [2021-12-27 21:31:18,800 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr3.c [2021-12-27 21:31:18,804 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 21:31:18,804 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 21:31:18,839 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 21:31:18,848 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 21:31:18,849 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 21:31:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:31:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-27 21:31:18,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:18,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:18,873 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:18,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1781049194, now seen corresponding path program 1 times [2021-12-27 21:31:18,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:18,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366086236] [2021-12-27 21:31:18,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:18,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:31:19,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:19,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366086236] [2021-12-27 21:31:19,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366086236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:31:19,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:31:19,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-27 21:31:19,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458751084] [2021-12-27 21:31:19,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:31:19,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-27 21:31:19,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:19,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-27 21:31:19,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-27 21:31:19,113 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:31:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:19,132 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-12-27 21:31:19,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-27 21:31:19,134 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-27 21:31:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:19,142 INFO L225 Difference]: With dead ends: 57 [2021-12-27 21:31:19,142 INFO L226 Difference]: Without dead ends: 27 [2021-12-27 21:31:19,145 INFO L932 BasicCegarLoop]: 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 [2021-12-27 21:31:19,149 INFO L933 BasicCegarLoop]: 39 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, 39 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 [2021-12-27 21:31:19,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 21:31:19,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-27 21:31:19,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-27 21:31:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:31:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2021-12-27 21:31:19,184 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2021-12-27 21:31:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:19,185 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2021-12-27 21:31:19,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:31:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2021-12-27 21:31:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-27 21:31:19,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:19,186 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:19,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 21:31:19,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:19,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:19,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1807831303, now seen corresponding path program 1 times [2021-12-27 21:31:19,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:19,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270881123] [2021-12-27 21:31:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:19,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 21:31:19,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:19,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270881123] [2021-12-27 21:31:19,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270881123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 21:31:19,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 21:31:19,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-27 21:31:19,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203706927] [2021-12-27 21:31:19,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 21:31:19,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-27 21:31:19,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:19,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-27 21:31:19,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:31:19,422 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:31:19,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:19,555 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-12-27 21:31:19,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-27 21:31:19,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-27 21:31:19,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:19,557 INFO L225 Difference]: With dead ends: 45 [2021-12-27 21:31:19,557 INFO L226 Difference]: Without dead ends: 38 [2021-12-27 21:31:19,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-27 21:31:19,562 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:19,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:31:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-27 21:31:19,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-12-27 21:31:19,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-27 21:31:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-27 21:31:19,570 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2021-12-27 21:31:19,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:19,570 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-27 21:31:19,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 21:31:19,571 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-27 21:31:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 21:31:19,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:19,571 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:19,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-27 21:31:19,572 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:19,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1367310263, now seen corresponding path program 1 times [2021-12-27 21:31:19,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:19,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295478563] [2021-12-27 21:31:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:19,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:19,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:19,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:19,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:19,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:19,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:19,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295478563] [2021-12-27 21:31:19,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295478563] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:19,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343135778] [2021-12-27 21:31:19,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:19,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:19,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:19,795 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) [2021-12-27 21:31:19,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 21:31:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:19,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-27 21:31:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:19,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:20,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:20,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2021-12-27 21:31:20,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:20,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-27 21:31:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:20,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:20,184 INFO L387 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 15 treesize of output 13 [2021-12-27 21:31:20,186 INFO L387 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 24 treesize of output 22 [2021-12-27 21:31:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:20,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343135778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:20,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:20,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2021-12-27 21:31:20,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99550840] [2021-12-27 21:31:20,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:20,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-27 21:31:20,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:20,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-27 21:31:20,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-27 21:31:20,214 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-27 21:31:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:20,409 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2021-12-27 21:31:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-27 21:31:20,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2021-12-27 21:31:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:20,423 INFO L225 Difference]: With dead ends: 84 [2021-12-27 21:31:20,423 INFO L226 Difference]: Without dead ends: 82 [2021-12-27 21:31:20,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:31:20,425 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:20,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 181 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 21:31:20,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-27 21:31:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2021-12-27 21:31:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-27 21:31:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2021-12-27 21:31:20,432 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 31 [2021-12-27 21:31:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:20,432 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2021-12-27 21:31:20,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-27 21:31:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2021-12-27 21:31:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-27 21:31:20,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:20,433 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:20,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:20,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:20,649 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1238713291, now seen corresponding path program 1 times [2021-12-27 21:31:20,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:20,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463601431] [2021-12-27 21:31:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:20,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:20,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:20,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:20,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:20,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:20,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:20,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:20,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463601431] [2021-12-27 21:31:20,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463601431] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:20,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535228305] [2021-12-27 21:31:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:20,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:20,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:20,863 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) [2021-12-27 21:31:20,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 21:31:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:20,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-27 21:31:20,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:21,010 INFO L387 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 16 treesize of output 12 [2021-12-27 21:31:21,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:21,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:31:21,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:21,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-27 21:31:21,235 INFO L387 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 15 treesize of output 7 [2021-12-27 21:31:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-27 21:31:21,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:21,759 INFO L387 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 15 treesize of output 13 [2021-12-27 21:31:21,762 INFO L387 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 28 treesize of output 26 [2021-12-27 21:31:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:21,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535228305] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:21,846 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:21,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2021-12-27 21:31:21,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931755819] [2021-12-27 21:31:21,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:21,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-27 21:31:21,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:21,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-27 21:31:21,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-12-27 21:31:21,853 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-27 21:31:22,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:22,354 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2021-12-27 21:31:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-27 21:31:22,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 31 [2021-12-27 21:31:22,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:22,358 INFO L225 Difference]: With dead ends: 137 [2021-12-27 21:31:22,358 INFO L226 Difference]: Without dead ends: 135 [2021-12-27 21:31:22,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2021-12-27 21:31:22,359 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 194 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:22,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 409 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 385 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2021-12-27 21:31:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-12-27 21:31:22,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 63. [2021-12-27 21:31:22,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3125) internal successors, (63), 49 states have internal predecessors, (63), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-27 21:31:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2021-12-27 21:31:22,381 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 31 [2021-12-27 21:31:22,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:22,382 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2021-12-27 21:31:22,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-27 21:31:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2021-12-27 21:31:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-27 21:31:22,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:22,383 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:22,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:22,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-27 21:31:22,600 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:22,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2026411713, now seen corresponding path program 1 times [2021-12-27 21:31:22,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:22,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360356247] [2021-12-27 21:31:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:22,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:22,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:22,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:22,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:22,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:22,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360356247] [2021-12-27 21:31:22,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360356247] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:22,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513446537] [2021-12-27 21:31:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:22,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:22,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:22,756 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) [2021-12-27 21:31:22,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 21:31:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:22,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-27 21:31:22,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:22,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:22,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:22,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2021-12-27 21:31:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:22,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:23,036 INFO L387 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 17 treesize of output 15 [2021-12-27 21:31:23,038 INFO L387 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 30 treesize of output 26 [2021-12-27 21:31:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:23,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513446537] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:23,071 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:23,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2021-12-27 21:31:23,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394762015] [2021-12-27 21:31:23,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:23,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-27 21:31:23,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-27 21:31:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-27 21:31:23,072 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-27 21:31:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:23,347 INFO L93 Difference]: Finished difference Result 202 states and 292 transitions. [2021-12-27 21:31:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-27 21:31:23,348 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2021-12-27 21:31:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:23,349 INFO L225 Difference]: With dead ends: 202 [2021-12-27 21:31:23,349 INFO L226 Difference]: Without dead ends: 200 [2021-12-27 21:31:23,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-12-27 21:31:23,350 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 83 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:23,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 265 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:31:23,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-12-27 21:31:23,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 105. [2021-12-27 21:31:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.35) internal successors, (108), 82 states have internal predecessors, (108), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-27 21:31:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2021-12-27 21:31:23,365 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 35 [2021-12-27 21:31:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:23,365 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2021-12-27 21:31:23,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-27 21:31:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2021-12-27 21:31:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-27 21:31:23,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:23,367 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:23,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:23,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:23,581 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:23,582 INFO L85 PathProgramCache]: Analyzing trace with hash 680207681, now seen corresponding path program 1 times [2021-12-27 21:31:23,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:23,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148335989] [2021-12-27 21:31:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:23,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:23,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:23,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:23,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:23,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:23,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148335989] [2021-12-27 21:31:23,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148335989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:23,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805506573] [2021-12-27 21:31:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:23,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:23,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:23,743 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) [2021-12-27 21:31:23,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 21:31:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:23,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-27 21:31:23,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:23,925 INFO L387 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 16 treesize of output 12 [2021-12-27 21:31:23,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:23,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-27 21:31:24,098 INFO L387 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 15 treesize of output 7 [2021-12-27 21:31:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-27 21:31:24,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:24,205 INFO L387 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 17 treesize of output 15 [2021-12-27 21:31:24,208 INFO L387 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 34 treesize of output 30 [2021-12-27 21:31:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:24,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805506573] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:24,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:24,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2021-12-27 21:31:24,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506047363] [2021-12-27 21:31:24,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:24,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-27 21:31:24,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-27 21:31:24,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-12-27 21:31:24,287 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-27 21:31:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:24,920 INFO L93 Difference]: Finished difference Result 318 states and 449 transitions. [2021-12-27 21:31:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-27 21:31:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 35 [2021-12-27 21:31:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:24,922 INFO L225 Difference]: With dead ends: 318 [2021-12-27 21:31:24,922 INFO L226 Difference]: Without dead ends: 316 [2021-12-27 21:31:24,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2021-12-27 21:31:24,924 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 175 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:24,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 450 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 482 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2021-12-27 21:31:24,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-27 21:31:24,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 148. [2021-12-27 21:31:24,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 110 states have (on average 1.3727272727272728) internal successors, (151), 113 states have internal predecessors, (151), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-27 21:31:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 217 transitions. [2021-12-27 21:31:24,941 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 217 transitions. Word has length 35 [2021-12-27 21:31:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:24,941 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 217 transitions. [2021-12-27 21:31:24,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-27 21:31:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 217 transitions. [2021-12-27 21:31:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-27 21:31:24,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:24,943 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:24,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-27 21:31:25,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:25,161 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash -406526155, now seen corresponding path program 2 times [2021-12-27 21:31:25,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:25,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960263337] [2021-12-27 21:31:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:25,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:25,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:25,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:25,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:25,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:25,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:25,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960263337] [2021-12-27 21:31:25,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960263337] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:25,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419687915] [2021-12-27 21:31:25,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:31:25,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:25,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:25,232 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) [2021-12-27 21:31:25,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 21:31:25,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:31:25,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:31:25,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-27 21:31:25,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:25,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-27 21:31:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:25,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:25,444 INFO L387 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 17 treesize of output 15 [2021-12-27 21:31:25,445 INFO L387 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 30 treesize of output 26 [2021-12-27 21:31:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:25,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419687915] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:25,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:25,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2021-12-27 21:31:25,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380034483] [2021-12-27 21:31:25,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:25,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-27 21:31:25,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:25,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-27 21:31:25,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-27 21:31:25,494 INFO L87 Difference]: Start difference. First operand 148 states and 217 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-27 21:31:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:25,899 INFO L93 Difference]: Finished difference Result 629 states and 954 transitions. [2021-12-27 21:31:25,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-27 21:31:25,900 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-12-27 21:31:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:25,911 INFO L225 Difference]: With dead ends: 629 [2021-12-27 21:31:25,911 INFO L226 Difference]: Without dead ends: 627 [2021-12-27 21:31:25,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-12-27 21:31:25,932 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 65 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:25,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 314 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:31:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2021-12-27 21:31:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 337. [2021-12-27 21:31:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 252 states have (on average 1.4206349206349207) internal successors, (358), 252 states have internal predecessors, (358), 80 states have call successors, (80), 4 states have call predecessors, (80), 4 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2021-12-27 21:31:25,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 518 transitions. [2021-12-27 21:31:25,983 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 518 transitions. Word has length 39 [2021-12-27 21:31:25,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:25,984 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 518 transitions. [2021-12-27 21:31:25,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-27 21:31:25,984 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 518 transitions. [2021-12-27 21:31:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-27 21:31:25,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:25,989 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:26,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:26,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:26,206 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:26,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:26,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1686389833, now seen corresponding path program 1 times [2021-12-27 21:31:26,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:26,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723173688] [2021-12-27 21:31:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:26,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:26,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:26,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:26,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:26,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:26,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723173688] [2021-12-27 21:31:26,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723173688] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:26,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621323891] [2021-12-27 21:31:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:26,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:26,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:26,330 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) [2021-12-27 21:31:26,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 21:31:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:26,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-27 21:31:26,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:26,484 INFO L387 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 [2021-12-27 21:31:26,591 INFO L387 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 [2021-12-27 21:31:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:26,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:26,666 INFO L387 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 17 treesize of output 15 [2021-12-27 21:31:26,667 INFO L387 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 34 treesize of output 30 [2021-12-27 21:31:26,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621323891] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:26,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:31:26,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-27 21:31:26,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657383637] [2021-12-27 21:31:26,693 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:26,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 21:31:26,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:26,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 21:31:26,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-12-27 21:31:26,694 INFO L87 Difference]: Start difference. First operand 337 states and 518 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:31:27,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:27,507 INFO L93 Difference]: Finished difference Result 699 states and 1051 transitions. [2021-12-27 21:31:27,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-27 21:31:27,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-12-27 21:31:27,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:27,510 INFO L225 Difference]: With dead ends: 699 [2021-12-27 21:31:27,510 INFO L226 Difference]: Without dead ends: 697 [2021-12-27 21:31:27,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=1913, Unknown=0, NotChecked=0, Total=2352 [2021-12-27 21:31:27,511 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 171 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:27,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 327 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 21:31:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2021-12-27 21:31:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 160. [2021-12-27 21:31:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 125 states have internal predecessors, (165), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-27 21:31:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 231 transitions. [2021-12-27 21:31:27,532 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 231 transitions. Word has length 39 [2021-12-27 21:31:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:27,533 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 231 transitions. [2021-12-27 21:31:27,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-27 21:31:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 231 transitions. [2021-12-27 21:31:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-27 21:31:27,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:27,534 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:27,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-27 21:31:27,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:27,753 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:27,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:27,754 INFO L85 PathProgramCache]: Analyzing trace with hash 685144619, now seen corresponding path program 3 times [2021-12-27 21:31:27,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:27,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435639172] [2021-12-27 21:31:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:27,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:27,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:27,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:27,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:27,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:27,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435639172] [2021-12-27 21:31:27,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435639172] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:27,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075132281] [2021-12-27 21:31:27,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-27 21:31:27,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:27,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:27,950 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) [2021-12-27 21:31:27,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-27 21:31:27,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-27 21:31:27,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:31:27,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-27 21:31:28,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:28,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-27 21:31:28,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075132281] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:28,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:28,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2021-12-27 21:31:28,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67345078] [2021-12-27 21:31:28,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:28,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-27 21:31:28,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:28,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-27 21:31:28,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-12-27 21:31:28,591 INFO L87 Difference]: Start difference. First operand 160 states and 231 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-27 21:31:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:28,858 INFO L93 Difference]: Finished difference Result 267 states and 383 transitions. [2021-12-27 21:31:28,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-27 21:31:28,860 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2021-12-27 21:31:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:28,861 INFO L225 Difference]: With dead ends: 267 [2021-12-27 21:31:28,861 INFO L226 Difference]: Without dead ends: 247 [2021-12-27 21:31:28,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2021-12-27 21:31:28,862 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 272 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:28,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 144 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:31:28,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-27 21:31:28,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 177. [2021-12-27 21:31:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-27 21:31:28,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2021-12-27 21:31:28,908 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 43 [2021-12-27 21:31:28,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:28,909 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2021-12-27 21:31:28,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-27 21:31:28,909 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2021-12-27 21:31:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-27 21:31:28,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:28,910 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:28,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-27 21:31:29,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:29,126 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:29,126 INFO L85 PathProgramCache]: Analyzing trace with hash 466828189, now seen corresponding path program 2 times [2021-12-27 21:31:29,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:29,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139025821] [2021-12-27 21:31:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:29,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:29,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:29,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:29,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:29,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:31:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:29,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:31:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:29,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:31:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:29,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:29,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139025821] [2021-12-27 21:31:29,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139025821] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:29,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969516986] [2021-12-27 21:31:29,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:31:29,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:29,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:29,367 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) [2021-12-27 21:31:29,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-27 21:31:29,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:31:29,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:31:29,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-27 21:31:29,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:29,493 INFO L387 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 16 treesize of output 12 [2021-12-27 21:31:29,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:29,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:31:29,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:29,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:31:29,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:29,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:31:29,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:29,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:31:29,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:29,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-12-27 21:31:29,884 INFO L387 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 15 treesize of output 7 [2021-12-27 21:31:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:29,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:30,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969516986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:30,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:31:30,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-27 21:31:30,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886507142] [2021-12-27 21:31:30,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:30,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 21:31:30,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:30,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 21:31:30,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2021-12-27 21:31:30,839 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-27 21:31:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:31,457 INFO L93 Difference]: Finished difference Result 242 states and 338 transitions. [2021-12-27 21:31:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-27 21:31:31,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2021-12-27 21:31:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:31,459 INFO L225 Difference]: With dead ends: 242 [2021-12-27 21:31:31,460 INFO L226 Difference]: Without dead ends: 240 [2021-12-27 21:31:31,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=1168, Unknown=1, NotChecked=0, Total=1406 [2021-12-27 21:31:31,461 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:31,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 315 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 399 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2021-12-27 21:31:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-27 21:31:31,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 141. [2021-12-27 21:31:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 110 states have (on average 1.3) internal successors, (143), 110 states have internal predecessors, (143), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-12-27 21:31:31,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2021-12-27 21:31:31,484 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 51 [2021-12-27 21:31:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:31,484 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2021-12-27 21:31:31,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-27 21:31:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2021-12-27 21:31:31,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-27 21:31:31,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:31,487 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:31,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-27 21:31:31,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-27 21:31:31,711 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:31,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1257132653, now seen corresponding path program 2 times [2021-12-27 21:31:31,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:31,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332926119] [2021-12-27 21:31:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:31,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:31,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:31,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:31,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:31:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:31,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:31:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:31,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:31:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:31,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:31,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332926119] [2021-12-27 21:31:31,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332926119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:31,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148241795] [2021-12-27 21:31:31,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:31:31,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:31,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:31,949 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) [2021-12-27 21:31:31,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-27 21:31:32,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:31:32,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:31:32,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-27 21:31:32,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:32,133 INFO L387 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 16 treesize of output 12 [2021-12-27 21:31:32,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:32,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:31:32,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:32,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:31:32,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:32,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:31:32,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:31:32,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:31:32,504 INFO L387 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 15 treesize of output 7 [2021-12-27 21:31:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-27 21:31:32,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:33,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148241795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:33,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:31:33,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-12-27 21:31:33,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186548199] [2021-12-27 21:31:33,066 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:33,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 21:31:33,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 21:31:33,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=346, Unknown=1, NotChecked=0, Total=420 [2021-12-27 21:31:33,067 INFO L87 Difference]: Start difference. First operand 141 states and 193 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-27 21:31:33,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:33,583 INFO L93 Difference]: Finished difference Result 359 states and 500 transitions. [2021-12-27 21:31:33,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-27 21:31:33,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 55 [2021-12-27 21:31:33,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:33,585 INFO L225 Difference]: With dead ends: 359 [2021-12-27 21:31:33,585 INFO L226 Difference]: Without dead ends: 357 [2021-12-27 21:31:33,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=322, Invalid=1569, Unknown=1, NotChecked=0, Total=1892 [2021-12-27 21:31:33,592 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 142 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:33,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 432 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 476 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2021-12-27 21:31:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-12-27 21:31:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 181. [2021-12-27 21:31:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 138 states have (on average 1.326086956521739) internal successors, (183), 138 states have internal predecessors, (183), 35 states have call successors, (35), 7 states have call predecessors, (35), 7 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-27 21:31:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 253 transitions. [2021-12-27 21:31:33,652 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 253 transitions. Word has length 55 [2021-12-27 21:31:33,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:33,653 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 253 transitions. [2021-12-27 21:31:33,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-12-27 21:31:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 253 transitions. [2021-12-27 21:31:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-27 21:31:33,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:33,664 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:33,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:33,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:33,879 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:33,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:33,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1929317243, now seen corresponding path program 4 times [2021-12-27 21:31:33,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:33,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436765470] [2021-12-27 21:31:33,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:33,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:34,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:34,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:34,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:34,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:31:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:34,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:31:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:34,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:31:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:34,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:34,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436765470] [2021-12-27 21:31:34,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436765470] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:34,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023194542] [2021-12-27 21:31:34,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-27 21:31:34,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:34,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:34,112 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) [2021-12-27 21:31:34,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-27 21:31:34,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-27 21:31:34,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:31:34,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-27 21:31:34,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:34,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:34,281 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-27 21:31:34,282 INFO L387 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 30 treesize of output 29 [2021-12-27 21:31:34,305 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-27 21:31:34,305 INFO L387 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 24 treesize of output 23 [2021-12-27 21:31:34,416 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:34,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:34,529 INFO L387 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 17 treesize of output 15 [2021-12-27 21:31:34,530 INFO L387 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 30 treesize of output 26 [2021-12-27 21:31:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:34,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023194542] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:34,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:34,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2021-12-27 21:31:34,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840085219] [2021-12-27 21:31:34,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:34,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-27 21:31:34,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:34,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-27 21:31:34,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-27 21:31:34,589 INFO L87 Difference]: Start difference. First operand 181 states and 253 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-27 21:31:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:36,296 INFO L93 Difference]: Finished difference Result 1601 states and 2483 transitions. [2021-12-27 21:31:36,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-27 21:31:36,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 63 [2021-12-27 21:31:36,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:36,302 INFO L225 Difference]: With dead ends: 1601 [2021-12-27 21:31:36,302 INFO L226 Difference]: Without dead ends: 1599 [2021-12-27 21:31:36,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=682, Invalid=3874, Unknown=0, NotChecked=0, Total=4556 [2021-12-27 21:31:36,304 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 293 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 2331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:36,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 871 Invalid, 2331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 1645 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-27 21:31:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-12-27 21:31:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 325. [2021-12-27 21:31:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 246 states have (on average 1.3821138211382114) internal successors, (340), 246 states have internal predecessors, (340), 71 states have call successors, (71), 7 states have call predecessors, (71), 7 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2021-12-27 21:31:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 482 transitions. [2021-12-27 21:31:36,366 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 482 transitions. Word has length 63 [2021-12-27 21:31:36,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:36,366 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 482 transitions. [2021-12-27 21:31:36,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-12-27 21:31:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 482 transitions. [2021-12-27 21:31:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-27 21:31:36,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:36,368 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:36,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-27 21:31:36,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-27 21:31:36,583 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1664050179, now seen corresponding path program 1 times [2021-12-27 21:31:36,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291213565] [2021-12-27 21:31:36,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:36,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:36,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:36,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:36,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:36,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:31:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:36,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:31:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:36,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:31:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:36,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:36,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291213565] [2021-12-27 21:31:36,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291213565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:36,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389546988] [2021-12-27 21:31:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:36,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:36,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:36,798 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) [2021-12-27 21:31:36,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-27 21:31:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-27 21:31:36,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:36,983 INFO L387 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 16 treesize of output 12 [2021-12-27 21:31:37,052 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-27 21:31:37,053 INFO L387 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 29 treesize of output 28 [2021-12-27 21:31:37,110 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-27 21:31:37,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-27 21:31:37,269 INFO L387 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 [2021-12-27 21:31:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-27 21:31:37,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:37,842 INFO L387 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 17 treesize of output 15 [2021-12-27 21:31:37,843 INFO L387 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 34 treesize of output 30 [2021-12-27 21:31:37,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389546988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:37,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:31:37,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-12-27 21:31:37,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001546106] [2021-12-27 21:31:37,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:37,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-27 21:31:37,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:37,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-27 21:31:37,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2021-12-27 21:31:37,887 INFO L87 Difference]: Start difference. First operand 325 states and 482 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-27 21:31:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:39,052 INFO L93 Difference]: Finished difference Result 710 states and 1027 transitions. [2021-12-27 21:31:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-12-27 21:31:39,054 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 63 [2021-12-27 21:31:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:39,072 INFO L225 Difference]: With dead ends: 710 [2021-12-27 21:31:39,072 INFO L226 Difference]: Without dead ends: 708 [2021-12-27 21:31:39,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=459, Invalid=3447, Unknown=0, NotChecked=0, Total=3906 [2021-12-27 21:31:39,077 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 242 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:39,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 724 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 915 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2021-12-27 21:31:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-12-27 21:31:39,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 403. [2021-12-27 21:31:39,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 302 states have (on average 1.390728476821192) internal successors, (420), 302 states have internal predecessors, (420), 89 states have call successors, (89), 11 states have call predecessors, (89), 11 states have return successors, (89), 89 states have call predecessors, (89), 89 states have call successors, (89) [2021-12-27 21:31:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 598 transitions. [2021-12-27 21:31:39,166 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 598 transitions. Word has length 63 [2021-12-27 21:31:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:39,166 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 598 transitions. [2021-12-27 21:31:39,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-27 21:31:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 598 transitions. [2021-12-27 21:31:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-27 21:31:39,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:39,171 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:39,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:39,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-27 21:31:39,388 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:39,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:39,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2043081871, now seen corresponding path program 5 times [2021-12-27 21:31:39,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:39,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500776250] [2021-12-27 21:31:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:39,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:31:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:31:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:31:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:39,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:39,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500776250] [2021-12-27 21:31:39,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500776250] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:39,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752089164] [2021-12-27 21:31:39,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-27 21:31:39,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:39,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:39,506 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) [2021-12-27 21:31:39,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-27 21:31:39,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-27 21:31:39,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:31:39,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-27 21:31:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:39,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:31:39,708 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-27 21:31:39,708 INFO L387 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 30 treesize of output 29 [2021-12-27 21:31:39,840 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-27 21:31:39,840 INFO L387 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 46 treesize of output 24 [2021-12-27 21:31:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:39,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:39,927 INFO L387 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 17 treesize of output 15 [2021-12-27 21:31:39,928 INFO L387 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 30 treesize of output 26 [2021-12-27 21:31:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:39,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752089164] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:39,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:39,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2021-12-27 21:31:39,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484571787] [2021-12-27 21:31:39,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:39,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-27 21:31:39,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:39,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-27 21:31:39,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-12-27 21:31:39,978 INFO L87 Difference]: Start difference. First operand 403 states and 598 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-27 21:31:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:42,867 INFO L93 Difference]: Finished difference Result 4179 states and 6593 transitions. [2021-12-27 21:31:42,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-27 21:31:42,868 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2021-12-27 21:31:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:42,879 INFO L225 Difference]: With dead ends: 4179 [2021-12-27 21:31:42,880 INFO L226 Difference]: Without dead ends: 4177 [2021-12-27 21:31:42,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=721, Invalid=5441, Unknown=0, NotChecked=0, Total=6162 [2021-12-27 21:31:42,883 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 167 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 2863 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 3344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 2863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:42,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1367 Invalid, 3344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 2863 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-27 21:31:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-12-27 21:31:43,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 905. [2021-12-27 21:31:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 674 states have (on average 1.4332344213649852) internal successors, (966), 674 states have internal predecessors, (966), 219 states have call successors, (219), 11 states have call predecessors, (219), 11 states have return successors, (219), 219 states have call predecessors, (219), 219 states have call successors, (219) [2021-12-27 21:31:43,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1404 transitions. [2021-12-27 21:31:43,117 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1404 transitions. Word has length 67 [2021-12-27 21:31:43,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:43,117 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1404 transitions. [2021-12-27 21:31:43,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-27 21:31:43,118 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1404 transitions. [2021-12-27 21:31:43,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-27 21:31:43,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:43,119 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:43,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-27 21:31:43,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-27 21:31:43,336 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:43,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:43,336 INFO L85 PathProgramCache]: Analyzing trace with hash -656878477, now seen corresponding path program 1 times [2021-12-27 21:31:43,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:43,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611617748] [2021-12-27 21:31:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:43,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:43,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:43,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:31:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:31:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:31:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:43,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:43,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611617748] [2021-12-27 21:31:43,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611617748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:43,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231928862] [2021-12-27 21:31:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:43,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:43,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:43,536 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) [2021-12-27 21:31:43,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-27 21:31:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:43,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-27 21:31:43,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:43,804 INFO L387 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 16 treesize of output 12 [2021-12-27 21:31:43,940 INFO L353 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-27 21:31:43,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-27 21:31:44,183 INFO L387 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 [2021-12-27 21:31:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-27 21:31:44,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:46,385 INFO L387 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 17 treesize of output 15 [2021-12-27 21:31:46,386 INFO L387 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 34 treesize of output 30 [2021-12-27 21:31:46,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231928862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:46,415 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:31:46,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-27 21:31:46,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572621520] [2021-12-27 21:31:46,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:46,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-27 21:31:46,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:46,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-27 21:31:46,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=822, Unknown=1, NotChecked=0, Total=930 [2021-12-27 21:31:46,416 INFO L87 Difference]: Start difference. First operand 905 states and 1404 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-27 21:31:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:48,520 INFO L93 Difference]: Finished difference Result 2995 states and 4640 transitions. [2021-12-27 21:31:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-12-27 21:31:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 67 [2021-12-27 21:31:48,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:48,529 INFO L225 Difference]: With dead ends: 2995 [2021-12-27 21:31:48,529 INFO L226 Difference]: Without dead ends: 2993 [2021-12-27 21:31:48,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=690, Invalid=5789, Unknown=1, NotChecked=0, Total=6480 [2021-12-27 21:31:48,533 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 263 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 2282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:48,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 1125 Invalid, 2282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1738 Invalid, 0 Unknown, 145 Unchecked, 0.8s Time] [2021-12-27 21:31:48,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2993 states. [2021-12-27 21:31:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2993 to 987. [2021-12-27 21:31:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 734 states have (on average 1.4277929155313351) internal successors, (1048), 734 states have internal predecessors, (1048), 233 states have call successors, (233), 19 states have call predecessors, (233), 19 states have return successors, (233), 233 states have call predecessors, (233), 233 states have call successors, (233) [2021-12-27 21:31:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1514 transitions. [2021-12-27 21:31:48,748 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1514 transitions. Word has length 67 [2021-12-27 21:31:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:48,748 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 1514 transitions. [2021-12-27 21:31:48,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-27 21:31:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1514 transitions. [2021-12-27 21:31:48,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-27 21:31:48,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:48,752 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:48,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-27 21:31:48,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-27 21:31:48,971 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:48,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1810243687, now seen corresponding path program 6 times [2021-12-27 21:31:48,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:48,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025203925] [2021-12-27 21:31:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:48,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:48,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:49,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:49,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:49,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:49,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:31:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:49,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:31:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:49,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:31:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:49,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:49,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025203925] [2021-12-27 21:31:49,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025203925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:49,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977696614] [2021-12-27 21:31:49,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-27 21:31:49,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:49,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:49,117 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) [2021-12-27 21:31:49,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-27 21:31:49,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-27 21:31:49,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:31:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-27 21:31:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:31:49,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-12-27 21:31:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:49,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:31:49,652 INFO L387 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 [2021-12-27 21:31:49,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-12-27 21:31:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:49,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977696614] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:31:49,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:31:49,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2021-12-27 21:31:49,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857159322] [2021-12-27 21:31:49,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:31:49,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-27 21:31:49,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:31:49,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-27 21:31:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-12-27 21:31:49,753 INFO L87 Difference]: Start difference. First operand 987 states and 1514 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-27 21:31:58,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:31:58,341 INFO L93 Difference]: Finished difference Result 18877 states and 30152 transitions. [2021-12-27 21:31:58,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-12-27 21:31:58,342 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2021-12-27 21:31:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:31:58,408 INFO L225 Difference]: With dead ends: 18877 [2021-12-27 21:31:58,408 INFO L226 Difference]: Without dead ends: 18875 [2021-12-27 21:31:58,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12151 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2970, Invalid=26786, Unknown=0, NotChecked=0, Total=29756 [2021-12-27 21:31:58,418 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 435 mSDsluCounter, 2624 mSDsCounter, 0 mSdLazyCounter, 7191 mSolverCounterSat, 1468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 3058 SdHoareTripleChecker+Invalid, 9097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1468 IncrementalHoareTripleChecker+Valid, 7191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-27 21:31:58,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 3058 Invalid, 9097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1468 Valid, 7191 Invalid, 0 Unknown, 438 Unchecked, 2.9s Time] [2021-12-27 21:31:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18875 states. [2021-12-27 21:31:59,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18875 to 2609. [2021-12-27 21:31:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 1920 states have (on average 1.4588541666666666) internal successors, (2801), 1920 states have internal predecessors, (2801), 669 states have call successors, (669), 19 states have call predecessors, (669), 19 states have return successors, (669), 669 states have call predecessors, (669), 669 states have call successors, (669) [2021-12-27 21:31:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 4139 transitions. [2021-12-27 21:31:59,412 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 4139 transitions. Word has length 71 [2021-12-27 21:31:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:31:59,412 INFO L470 AbstractCegarLoop]: Abstraction has 2609 states and 4139 transitions. [2021-12-27 21:31:59,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-27 21:31:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 4139 transitions. [2021-12-27 21:31:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-27 21:31:59,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:31:59,416 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:31:59,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-27 21:31:59,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:59,631 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:31:59,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:31:59,632 INFO L85 PathProgramCache]: Analyzing trace with hash -561495575, now seen corresponding path program 1 times [2021-12-27 21:31:59,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:31:59,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354957195] [2021-12-27 21:31:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:59,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:31:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:59,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:31:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:59,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:31:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:59,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:31:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:59,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:31:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:59,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:31:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:59,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:31:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:31:59,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:31:59,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354957195] [2021-12-27 21:31:59,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354957195] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:31:59,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628038532] [2021-12-27 21:31:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:31:59,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:31:59,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:31:59,788 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) [2021-12-27 21:31:59,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-27 21:31:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:31:59,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-27 21:31:59,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:00,120 INFO L387 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 [2021-12-27 21:32:00,374 INFO L387 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 [2021-12-27 21:32:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:32:00,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:00,530 INFO L387 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 17 treesize of output 15 [2021-12-27 21:32:00,532 INFO L387 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 34 treesize of output 30 [2021-12-27 21:32:00,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628038532] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:00,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:32:00,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-12-27 21:32:00,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181415970] [2021-12-27 21:32:00,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:00,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-27 21:32:00,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:00,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-27 21:32:00,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-12-27 21:32:00,561 INFO L87 Difference]: Start difference. First operand 2609 states and 4139 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-27 21:32:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:04,210 INFO L93 Difference]: Finished difference Result 6189 states and 9723 transitions. [2021-12-27 21:32:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-12-27 21:32:04,211 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2021-12-27 21:32:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:04,224 INFO L225 Difference]: With dead ends: 6189 [2021-12-27 21:32:04,224 INFO L226 Difference]: Without dead ends: 6187 [2021-12-27 21:32:04,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3030 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1287, Invalid=8613, Unknown=0, NotChecked=0, Total=9900 [2021-12-27 21:32:04,226 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 309 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 1804 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 1804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:04,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 1063 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 1804 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-27 21:32:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6187 states. [2021-12-27 21:32:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6187 to 1091. [2021-12-27 21:32:04,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 824 states have (on average 1.4138349514563107) internal successors, (1165), 824 states have internal predecessors, (1165), 247 states have call successors, (247), 19 states have call predecessors, (247), 19 states have return successors, (247), 247 states have call predecessors, (247), 247 states have call successors, (247) [2021-12-27 21:32:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1659 transitions. [2021-12-27 21:32:04,549 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1659 transitions. Word has length 71 [2021-12-27 21:32:04,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:04,550 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1659 transitions. [2021-12-27 21:32:04,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-27 21:32:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1659 transitions. [2021-12-27 21:32:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-27 21:32:04,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:04,553 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:04,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-27 21:32:04,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-27 21:32:04,763 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:04,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash -424463901, now seen corresponding path program 2 times [2021-12-27 21:32:04,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:04,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300827464] [2021-12-27 21:32:04,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:04,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:05,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:05,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:05,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:05,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:05,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:32:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:05,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:32:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:05,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:32:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:05,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-27 21:32:05,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:05,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-27 21:32:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:05,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-27 21:32:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:05,024 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-27 21:32:05,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300827464] [2021-12-27 21:32:05,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300827464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:05,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436890992] [2021-12-27 21:32:05,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:32:05,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:05,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:05,028 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) [2021-12-27 21:32:05,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-27 21:32:05,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:32:05,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:32:05,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-27 21:32:05,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:05,237 INFO L387 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 16 treesize of output 12 [2021-12-27 21:32:05,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:05,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-12-27 21:32:05,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:05,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:05,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:05,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:05,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:05,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:05,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:05,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:05,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:05,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:05,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-27 21:32:05,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2021-12-27 21:32:05,857 INFO L387 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 15 treesize of output 7 [2021-12-27 21:32:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-27 21:32:05,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:06,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436890992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:06,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-27 21:32:06,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-12-27 21:32:06,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501583950] [2021-12-27 21:32:06,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:06,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-27 21:32:06,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:06,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-27 21:32:06,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=469, Unknown=1, NotChecked=0, Total=552 [2021-12-27 21:32:06,387 INFO L87 Difference]: Start difference. First operand 1091 states and 1659 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-27 21:32:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:07,450 INFO L93 Difference]: Finished difference Result 1819 states and 2737 transitions. [2021-12-27 21:32:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-27 21:32:07,453 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 75 [2021-12-27 21:32:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:07,459 INFO L225 Difference]: With dead ends: 1819 [2021-12-27 21:32:07,460 INFO L226 Difference]: Without dead ends: 1817 [2021-12-27 21:32:07,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 99 SyntacticMatches, 16 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=319, Invalid=1842, Unknown=1, NotChecked=0, Total=2162 [2021-12-27 21:32:07,461 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 114 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:07,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 429 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 578 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-12-27 21:32:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1817 states. [2021-12-27 21:32:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1817 to 677. [2021-12-27 21:32:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 512 states have (on average 1.380859375) internal successors, (707), 515 states have internal predecessors, (707), 146 states have call successors, (146), 18 states have call predecessors, (146), 18 states have return successors, (146), 143 states have call predecessors, (146), 146 states have call successors, (146) [2021-12-27 21:32:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 999 transitions. [2021-12-27 21:32:07,886 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 999 transitions. Word has length 75 [2021-12-27 21:32:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:07,886 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 999 transitions. [2021-12-27 21:32:07,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 9 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-12-27 21:32:07,886 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 999 transitions. [2021-12-27 21:32:07,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-27 21:32:07,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:07,888 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:07,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-27 21:32:08,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-27 21:32:08,106 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash -629945763, now seen corresponding path program 7 times [2021-12-27 21:32:08,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:08,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960756990] [2021-12-27 21:32:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:08,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:08,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:08,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:08,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:08,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:32:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:08,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:32:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:08,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:32:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 34 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:32:08,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960756990] [2021-12-27 21:32:08,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960756990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080688441] [2021-12-27 21:32:08,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-27 21:32:08,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:08,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:08,418 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) [2021-12-27 21:32:08,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-27 21:32:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:08,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-27 21:32:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:32:09,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-27 21:32:09,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080688441] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:32:09,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:32:09,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2021-12-27 21:32:09,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564552039] [2021-12-27 21:32:09,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:09,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-27 21:32:09,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:09,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-27 21:32:09,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2021-12-27 21:32:09,375 INFO L87 Difference]: Start difference. First operand 677 states and 999 transitions. Second operand has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-27 21:32:10,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 21:32:10,110 INFO L93 Difference]: Finished difference Result 798 states and 1170 transitions. [2021-12-27 21:32:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-27 21:32:10,111 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 75 [2021-12-27 21:32:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 21:32:10,113 INFO L225 Difference]: With dead ends: 798 [2021-12-27 21:32:10,113 INFO L226 Difference]: Without dead ends: 766 [2021-12-27 21:32:10,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2021-12-27 21:32:10,115 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 297 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 21:32:10,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 206 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 21:32:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-12-27 21:32:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 691. [2021-12-27 21:32:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 524 states have (on average 1.349236641221374) internal successors, (707), 526 states have internal predecessors, (707), 148 states have call successors, (148), 18 states have call predecessors, (148), 18 states have return successors, (148), 146 states have call predecessors, (148), 148 states have call successors, (148) [2021-12-27 21:32:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1003 transitions. [2021-12-27 21:32:10,479 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1003 transitions. Word has length 75 [2021-12-27 21:32:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 21:32:10,480 INFO L470 AbstractCegarLoop]: Abstraction has 691 states and 1003 transitions. [2021-12-27 21:32:10,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-27 21:32:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1003 transitions. [2021-12-27 21:32:10,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-27 21:32:10,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 21:32:10,482 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 21:32:10,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-27 21:32:10,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:10,698 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 21:32:10,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 21:32:10,698 INFO L85 PathProgramCache]: Analyzing trace with hash 159587245, now seen corresponding path program 8 times [2021-12-27 21:32:10,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 21:32:10,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063473313] [2021-12-27 21:32:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 21:32:10,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 21:32:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:10,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-27 21:32:10,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:10,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-27 21:32:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:10,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-27 21:32:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:10,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-27 21:32:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:10,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-27 21:32:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:10,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-27 21:32:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:10,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-27 21:32:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:10,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-27 21:32:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:10,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-27 21:32:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 21:32:10,869 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-27 21:32:10,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 21:32:10,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063473313] [2021-12-27 21:32:10,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063473313] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 21:32:10,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065077919] [2021-12-27 21:32:10,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-27 21:32:10,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 21:32:10,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 21:32:10,892 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) [2021-12-27 21:32:10,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-27 21:32:10,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-27 21:32:10,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-27 21:32:10,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-27 21:32:10,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 21:32:11,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-27 21:32:11,115 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-27 21:32:11,115 INFO L387 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 30 treesize of output 29 [2021-12-27 21:32:11,144 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-27 21:32:11,144 INFO L387 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 30 treesize of output 29 [2021-12-27 21:32:11,355 INFO L353 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-27 21:32:11,355 INFO L387 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 46 treesize of output 24 [2021-12-27 21:32:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-27 21:32:11,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 21:32:11,489 INFO L387 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 17 treesize of output 15 [2021-12-27 21:32:11,490 INFO L387 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 30 treesize of output 26 [2021-12-27 21:32:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-12-27 21:32:11,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065077919] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 21:32:11,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 21:32:11,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2021-12-27 21:32:11,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454451974] [2021-12-27 21:32:11,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 21:32:11,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-27 21:32:11,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 21:32:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-27 21:32:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-12-27 21:32:11,602 INFO L87 Difference]: Start difference. First operand 691 states and 1003 transitions. Second operand has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11)