./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/mbpr5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/mbpr5.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 5503daab190ef8b57bdc3b49ed300bfd661cba05f76774439c2c92cf1668f08b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:55:24,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:55:24,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:55:24,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:55:24,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:55:24,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:55:24,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:55:24,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:55:24,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:55:24,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:55:24,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:55:24,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:55:24,793 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:55:24,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:55:24,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:55:24,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:55:24,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:55:24,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:55:24,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:55:24,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:55:24,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:55:24,809 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:55:24,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:55:24,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:55:24,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:55:24,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:55:24,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:55:24,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:55:24,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:55:24,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:55:24,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:55:24,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:55:24,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:55:24,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:55:24,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:55:24,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:55:24,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:55:24,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:55:24,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:55:24,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:55:24,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:55:24,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:55:24,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:55:24,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:55:24,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:55:24,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:55:24,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:55:24,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:55:24,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:55:24,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:55:24,851 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:55:24,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:55:24,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:55:24,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:55:24,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:55:24,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:55:24,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:55:24,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:55:24,853 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:55:24,853 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:55:24,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:55:24,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:55:24,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:55:24,854 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:55:24,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:55:24,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:55:24,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:55:24,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:55:24,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:55:24,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:55:24,855 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:55:24,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:55:24,856 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:55:24,856 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:55:24,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:55:24,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:55:24,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5503daab190ef8b57bdc3b49ed300bfd661cba05f76774439c2c92cf1668f08b [2021-12-21 09:55:25,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:55:25,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:55:25,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:55:25,087 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:55:25,088 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:55:25,089 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/mbpr5.c [2021-12-21 09:55:25,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9654d803f/16e2f491bf394884a39ae63a9d56ed7d/FLAG13280c77d [2021-12-21 09:55:25,523 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:55:25,524 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/mbpr5.c [2021-12-21 09:55:25,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9654d803f/16e2f491bf394884a39ae63a9d56ed7d/FLAG13280c77d [2021-12-21 09:55:25,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9654d803f/16e2f491bf394884a39ae63a9d56ed7d [2021-12-21 09:55:25,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:55:25,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:55:25,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:55:25,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:55:25,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:55:25,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ef881da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:25, skipping insertion in model container [2021-12-21 09:55:25,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:55:25" (1/1) ... [2021-12-21 09:55:25,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:55:25,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:55:26,116 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/mbpr5.c[396,409] [2021-12-21 09:55:26,176 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:55:26,187 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:55:26,197 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/mbpr5.c[396,409] [2021-12-21 09:55:26,217 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:55:26,234 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:55:26,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26 WrapperNode [2021-12-21 09:55:26,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:55:26,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:55:26,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:55:26,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:55:26,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (1/1) ... [2021-12-21 09:55:26,262 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (1/1) ... [2021-12-21 09:55:26,296 INFO L137 Inliner]: procedures = 15, calls = 64, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 173 [2021-12-21 09:55:26,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:55:26,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:55:26,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:55:26,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:55:26,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (1/1) ... [2021-12-21 09:55:26,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (1/1) ... [2021-12-21 09:55:26,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (1/1) ... [2021-12-21 09:55:26,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (1/1) ... [2021-12-21 09:55:26,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (1/1) ... [2021-12-21 09:55:26,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (1/1) ... [2021-12-21 09:55:26,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (1/1) ... [2021-12-21 09:55:26,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:55:26,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:55:26,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:55:26,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:55:26,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (1/1) ... [2021-12-21 09:55:26,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:55:26,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:26,380 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) [2021-12-21 09:55:26,405 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 [2021-12-21 09:55:26,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:55:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:55:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 09:55:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:55:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:55:26,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:55:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:55:26,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 09:55:26,519 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:55:26,520 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:55:26,753 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:55:26,760 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:55:26,760 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-12-21 09:55:26,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:26 BoogieIcfgContainer [2021-12-21 09:55:26,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:55:26,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:55:26,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:55:26,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:55:26,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:55:25" (1/3) ... [2021-12-21 09:55:26,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c68dad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:55:26, skipping insertion in model container [2021-12-21 09:55:26,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:55:26" (2/3) ... [2021-12-21 09:55:26,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c68dad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:55:26, skipping insertion in model container [2021-12-21 09:55:26,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:55:26" (3/3) ... [2021-12-21 09:55:26,779 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr5.c [2021-12-21 09:55:26,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:55:26,782 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:55:26,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:55:26,819 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 [2021-12-21 09:55:26,819 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:55:26,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 09:55:26,836 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:26,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:26,837 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:26,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:26,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1087925893, now seen corresponding path program 1 times [2021-12-21 09:55:26,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:26,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32392947] [2021-12-21 09:55:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:26,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:26,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:26,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32392947] [2021-12-21 09:55:26,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32392947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:26,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:55:26,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 09:55:26,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374293153] [2021-12-21 09:55:26,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:27,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 09:55:27,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:27,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 09:55:27,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 09:55:27,031 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:27,045 INFO L93 Difference]: Finished difference Result 83 states and 122 transitions. [2021-12-21 09:55:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 09:55:27,047 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-21 09:55:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:27,051 INFO L225 Difference]: With dead ends: 83 [2021-12-21 09:55:27,051 INFO L226 Difference]: Without dead ends: 39 [2021-12-21 09:55:27,054 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 [2021-12-21 09:55:27,056 INFO L933 BasicCegarLoop]: 57 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, 57 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 [2021-12-21 09:55:27,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-21 09:55:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-21 09:55:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-12-21 09:55:27,083 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 21 [2021-12-21 09:55:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:27,083 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-12-21 09:55:27,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,083 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-12-21 09:55:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 09:55:27,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:27,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:27,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:55:27,085 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:27,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:27,086 INFO L85 PathProgramCache]: Analyzing trace with hash -30028973, now seen corresponding path program 1 times [2021-12-21 09:55:27,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:27,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003784322] [2021-12-21 09:55:27,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:27,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:27,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:27,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003784322] [2021-12-21 09:55:27,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003784322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:27,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:55:27,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 09:55:27,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671403331] [2021-12-21 09:55:27,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:27,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 09:55:27,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:27,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 09:55:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 09:55:27,220 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:27,267 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-12-21 09:55:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 09:55:27,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-21 09:55:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:27,269 INFO L225 Difference]: With dead ends: 48 [2021-12-21 09:55:27,269 INFO L226 Difference]: Without dead ends: 46 [2021-12-21 09:55:27,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:55:27,272 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 9 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:27,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 140 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-21 09:55:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-12-21 09:55:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2021-12-21 09:55:27,286 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 21 [2021-12-21 09:55:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:27,287 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2021-12-21 09:55:27,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2021-12-21 09:55:27,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-21 09:55:27,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:27,291 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:27,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 09:55:27,292 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:27,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:27,293 INFO L85 PathProgramCache]: Analyzing trace with hash -29969391, now seen corresponding path program 1 times [2021-12-21 09:55:27,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:27,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748168787] [2021-12-21 09:55:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:27,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:27,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:27,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748168787] [2021-12-21 09:55:27,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748168787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:27,486 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:55:27,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 09:55:27,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689405351] [2021-12-21 09:55:27,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:27,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 09:55:27,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:27,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 09:55:27,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-21 09:55:27,489 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:27,624 INFO L93 Difference]: Finished difference Result 92 states and 122 transitions. [2021-12-21 09:55:27,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 09:55:27,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-21 09:55:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:27,626 INFO L225 Difference]: With dead ends: 92 [2021-12-21 09:55:27,627 INFO L226 Difference]: Without dead ends: 61 [2021-12-21 09:55:27,628 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 [2021-12-21 09:55:27,629 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:27,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:55:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-21 09:55:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2021-12-21 09:55:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2021-12-21 09:55:27,644 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2021-12-21 09:55:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:27,645 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2021-12-21 09:55:27,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2021-12-21 09:55:27,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 09:55:27,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:27,648 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:27,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 09:55:27,648 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:27,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:27,649 INFO L85 PathProgramCache]: Analyzing trace with hash -175217928, now seen corresponding path program 1 times [2021-12-21 09:55:27,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:27,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855448284] [2021-12-21 09:55:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:27,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 09:55:27,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:27,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855448284] [2021-12-21 09:55:27,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855448284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:55:27,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:55:27,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:55:27,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237956268] [2021-12-21 09:55:27,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:55:27,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:55:27,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:27,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:55:27,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:55:27,812 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:27,844 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-12-21 09:55:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:55:27,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-21 09:55:27,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:27,846 INFO L225 Difference]: With dead ends: 61 [2021-12-21 09:55:27,846 INFO L226 Difference]: Without dead ends: 46 [2021-12-21 09:55:27,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:55:27,853 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 18 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:27,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 40 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 09:55:27,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-21 09:55:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-12-21 09:55:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2021-12-21 09:55:27,866 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 41 [2021-12-21 09:55:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:27,866 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2021-12-21 09:55:27,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2021-12-21 09:55:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-21 09:55:27,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:27,870 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:27,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 09:55:27,871 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:27,874 INFO L85 PathProgramCache]: Analyzing trace with hash -568244938, now seen corresponding path program 1 times [2021-12-21 09:55:27,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:27,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296983077] [2021-12-21 09:55:27,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:27,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:28,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:28,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296983077] [2021-12-21 09:55:28,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296983077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:28,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659960328] [2021-12-21 09:55:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:28,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:28,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:28,363 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) [2021-12-21 09:55:28,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:55:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 103 conjunts are in the unsatisfiable core [2021-12-21 09:55:28,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:28,643 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 [2021-12-21 09:55:28,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-21 09:55:28,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,785 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 [2021-12-21 09:55:28,820 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 0 case distinctions, treesize of input 51 treesize of output 40 [2021-12-21 09:55:28,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2021-12-21 09:55:28,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,905 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 [2021-12-21 09:55:28,931 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 0 case distinctions, treesize of input 51 treesize of output 40 [2021-12-21 09:55:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:28,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2021-12-21 09:55:29,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,025 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 [2021-12-21 09:55:29,047 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 0 case distinctions, treesize of input 51 treesize of output 40 [2021-12-21 09:55:29,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 38 [2021-12-21 09:55:29,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-12-21 09:55:29,154 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 0 case distinctions, treesize of input 60 treesize of output 47 [2021-12-21 09:55:29,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:29,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 50 [2021-12-21 09:55:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:29,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:29,826 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 31 treesize of output 27 [2021-12-21 09:55:29,830 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 55 treesize of output 51 [2021-12-21 09:55:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 09:55:29,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659960328] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:29,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:29,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 23 [2021-12-21 09:55:29,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472334899] [2021-12-21 09:55:29,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:29,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-21 09:55:29,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:29,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-21 09:55:29,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-12-21 09:55:29,981 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:30,645 INFO L93 Difference]: Finished difference Result 126 states and 153 transitions. [2021-12-21 09:55:30,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 09:55:30,646 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-21 09:55:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:30,647 INFO L225 Difference]: With dead ends: 126 [2021-12-21 09:55:30,647 INFO L226 Difference]: Without dead ends: 87 [2021-12-21 09:55:30,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 71 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 09:55:30,649 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 285 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:30,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 110 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 09:55:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-21 09:55:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 48. [2021-12-21 09:55:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-12-21 09:55:30,656 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 41 [2021-12-21 09:55:30,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:30,656 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-12-21 09:55:30,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-12-21 09:55:30,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-21 09:55:30,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:30,658 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:30,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 09:55:30,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:30,879 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1692770569, now seen corresponding path program 1 times [2021-12-21 09:55:30,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:30,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250411748] [2021-12-21 09:55:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:30,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:55:31,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:31,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250411748] [2021-12-21 09:55:31,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250411748] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:31,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288967940] [2021-12-21 09:55:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:31,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:31,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:31,120 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) [2021-12-21 09:55:31,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:55:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:31,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-21 09:55:31,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:31,359 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 [2021-12-21 09:55:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-21 09:55:31,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,456 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 [2021-12-21 09:55:31,468 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 0 case distinctions, treesize of input 53 treesize of output 42 [2021-12-21 09:55:31,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-12-21 09:55:31,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,534 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 [2021-12-21 09:55:31,556 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 0 case distinctions, treesize of input 53 treesize of output 42 [2021-12-21 09:55:31,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-12-21 09:55:31,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,615 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 [2021-12-21 09:55:31,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 49 [2021-12-21 09:55:31,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:31,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 50 [2021-12-21 09:55:31,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-21 09:55:31,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:32,299 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 35 treesize of output 31 [2021-12-21 09:55:32,301 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 67 treesize of output 59 [2021-12-21 09:55:32,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 09:55:32,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288967940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:32,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:32,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2021-12-21 09:55:32,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759288870] [2021-12-21 09:55:32,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:32,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-21 09:55:32,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-21 09:55:32,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-12-21 09:55:32,494 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:33,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:33,288 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2021-12-21 09:55:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 09:55:33,289 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 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 47 [2021-12-21 09:55:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:33,290 INFO L225 Difference]: With dead ends: 119 [2021-12-21 09:55:33,290 INFO L226 Difference]: Without dead ends: 84 [2021-12-21 09:55:33,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 82 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2021-12-21 09:55:33,291 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 340 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:33,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 120 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 09:55:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-21 09:55:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2021-12-21 09:55:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.169811320754717) internal successors, (62), 53 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-21 09:55:33,298 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 47 [2021-12-21 09:55:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:33,298 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-21 09:55:33,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:33,298 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-21 09:55:33,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 09:55:33,299 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:33,299 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:33,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 09:55:33,507 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,SelfDestructingSolverStorable5 [2021-12-21 09:55:33,507 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:33,508 INFO L85 PathProgramCache]: Analyzing trace with hash 964465308, now seen corresponding path program 2 times [2021-12-21 09:55:33,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:33,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110281113] [2021-12-21 09:55:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:33,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 09:55:33,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110281113] [2021-12-21 09:55:33,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110281113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124469317] [2021-12-21 09:55:33,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:55:33,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:33,829 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) [2021-12-21 09:55:33,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:55:33,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:55:33,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:33,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-21 09:55:33,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:34,148 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 [2021-12-21 09:55:34,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-21 09:55:34,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,258 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 [2021-12-21 09:55:34,280 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 0 case distinctions, treesize of input 70 treesize of output 57 [2021-12-21 09:55:34,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:55:34,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,345 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 [2021-12-21 09:55:34,359 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 0 case distinctions, treesize of input 57 treesize of output 48 [2021-12-21 09:55:34,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:34,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 41 [2021-12-21 09:55:34,576 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 [2021-12-21 09:55:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 09:55:34,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:34,877 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 [2021-12-21 09:55:34,879 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 [2021-12-21 09:55:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 09:55:34,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124469317] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:34,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:34,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-21 09:55:34,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218917228] [2021-12-21 09:55:34,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:34,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 09:55:34,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:34,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 09:55:34,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-12-21 09:55:34,950 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:35,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:35,482 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2021-12-21 09:55:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 09:55:35,482 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 states have internal predecessors, (148), 0 states have call successors, (0), 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 53 [2021-12-21 09:55:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:35,484 INFO L225 Difference]: With dead ends: 156 [2021-12-21 09:55:35,484 INFO L226 Difference]: Without dead ends: 121 [2021-12-21 09:55:35,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 09:55:35,486 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 248 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:35,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 139 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 09:55:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-21 09:55:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 60. [2021-12-21 09:55:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2021-12-21 09:55:35,494 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 53 [2021-12-21 09:55:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:35,494 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2021-12-21 09:55:35,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.7272727272727275) internal successors, (148), 22 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2021-12-21 09:55:35,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 09:55:35,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:35,496 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:35,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:35,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:35,712 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:35,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:35,712 INFO L85 PathProgramCache]: Analyzing trace with hash -477181457, now seen corresponding path program 3 times [2021-12-21 09:55:35,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:35,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587748888] [2021-12-21 09:55:35,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:35,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:35,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 09:55:35,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587748888] [2021-12-21 09:55:35,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587748888] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653016582] [2021-12-21 09:55:35,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:55:35,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:36,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:36,001 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) [2021-12-21 09:55:36,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:55:36,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-21 09:55:36,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:36,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-21 09:55:36,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:36,470 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 [2021-12-21 09:55:36,539 INFO L353 Elim1Store]: treesize reduction 296, result has 10.6 percent of original size [2021-12-21 09:55:36,539 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 4 case distinctions, treesize of input 36 treesize of output 47 [2021-12-21 09:55:36,600 INFO L353 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-21 09:55:36,600 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 [2021-12-21 09:55:36,648 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 0 case distinctions, treesize of input 88 treesize of output 71 [2021-12-21 09:55:36,696 INFO L353 Elim1Store]: treesize reduction 362, result has 8.8 percent of original size [2021-12-21 09:55:36,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 446 treesize of output 420 [2021-12-21 09:55:37,006 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 09:55:37,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:37,569 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 219 treesize of output 195 [2021-12-21 09:55:37,615 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-12-21 09:55:37,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118065 treesize of output 112625 [2021-12-21 09:55:37,973 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-21 09:55:37,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 09:55:37,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-12-21 09:55:37,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482375304] [2021-12-21 09:55:37,974 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:37,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 09:55:37,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:37,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 09:55:37,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-12-21 09:55:37,977 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:38,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:38,366 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2021-12-21 09:55:38,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 09:55:38,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-21 09:55:38,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:38,367 INFO L225 Difference]: With dead ends: 141 [2021-12-21 09:55:38,367 INFO L226 Difference]: Without dead ends: 106 [2021-12-21 09:55:38,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 09:55:38,368 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 143 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:38,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 111 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:55:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-12-21 09:55:38,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 66. [2021-12-21 09:55:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-12-21 09:55:38,376 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 59 [2021-12-21 09:55:38,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:38,377 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-12-21 09:55:38,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:38,377 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-12-21 09:55:38,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 09:55:38,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:38,378 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:38,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:38,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:38,592 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash -712968446, now seen corresponding path program 4 times [2021-12-21 09:55:38,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:38,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411444316] [2021-12-21 09:55:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:38,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 09:55:38,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:38,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411444316] [2021-12-21 09:55:38,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411444316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:38,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325063551] [2021-12-21 09:55:38,723 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:55:38,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:38,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:38,725 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:55:38,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 09:55:38,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:55:38,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:38,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-21 09:55:38,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:38,913 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 [2021-12-21 09:55:38,973 INFO L353 Elim1Store]: treesize reduction 306, result has 10.3 percent of original size [2021-12-21 09:55:38,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 47 [2021-12-21 09:55:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 09:55:39,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:39,271 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 [2021-12-21 09:55:39,274 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 [2021-12-21 09:55:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 09:55:39,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325063551] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:39,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:39,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2021-12-21 09:55:39,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177019624] [2021-12-21 09:55:39,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:39,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 09:55:39,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:39,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 09:55:39,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-21 09:55:39,307 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:39,820 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2021-12-21 09:55:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 09:55:39,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 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 65 [2021-12-21 09:55:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:39,821 INFO L225 Difference]: With dead ends: 116 [2021-12-21 09:55:39,821 INFO L226 Difference]: Without dead ends: 114 [2021-12-21 09:55:39,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 121 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-12-21 09:55:39,822 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 105 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:39,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 209 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 09:55:39,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-21 09:55:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2021-12-21 09:55:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:39,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2021-12-21 09:55:39,830 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 65 [2021-12-21 09:55:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:39,830 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2021-12-21 09:55:39,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.117647058823529) internal successors, (104), 17 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2021-12-21 09:55:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-21 09:55:39,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:39,831 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:39,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:40,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:40,048 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1869859285, now seen corresponding path program 5 times [2021-12-21 09:55:40,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:40,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168169586] [2021-12-21 09:55:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:40,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 09:55:40,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:40,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168169586] [2021-12-21 09:55:40,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168169586] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:40,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047046604] [2021-12-21 09:55:40,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:55:40,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:40,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:40,360 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) [2021-12-21 09:55:40,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 09:55:42,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-21 09:55:42,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:42,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 09:55:42,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 09:55:43,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 09:55:43,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047046604] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:55:43,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:55:43,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-12-21 09:55:43,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239444047] [2021-12-21 09:55:43,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:55:43,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-21 09:55:43,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:55:43,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-21 09:55:43,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-12-21 09:55:43,585 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 33 states, 33 states have (on average 6.0606060606060606) internal successors, (200), 33 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:43,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:55:43,988 INFO L93 Difference]: Finished difference Result 222 states and 245 transitions. [2021-12-21 09:55:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 09:55:43,989 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.0606060606060606) internal successors, (200), 33 states have internal predecessors, (200), 0 states have call successors, (0), 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 71 [2021-12-21 09:55:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:55:43,989 INFO L225 Difference]: With dead ends: 222 [2021-12-21 09:55:43,990 INFO L226 Difference]: Without dead ends: 107 [2021-12-21 09:55:43,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2021-12-21 09:55:43,991 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 308 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 09:55:43,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 183 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 09:55:43,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-21 09:55:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2021-12-21 09:55:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 91 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:44,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-12-21 09:55:44,001 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 71 [2021-12-21 09:55:44,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:55:44,001 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-12-21 09:55:44,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.0606060606060606) internal successors, (200), 33 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:55:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-12-21 09:55:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 09:55:44,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:55:44,006 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-12-21 09:55:44,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 09:55:44,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:44,228 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:55:44,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:55:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2130271302, now seen corresponding path program 6 times [2021-12-21 09:55:44,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:55:44,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139166534] [2021-12-21 09:55:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:55:44,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:55:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:55:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 34 proven. 55 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-21 09:55:44,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:55:44,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139166534] [2021-12-21 09:55:44,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139166534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:55:44,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864984228] [2021-12-21 09:55:44,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-21 09:55:44,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:55:44,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:55:44,544 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) [2021-12-21 09:55:44,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 09:55:46,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-21 09:55:46,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:55:46,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 09:55:46,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:55:46,947 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 [2021-12-21 09:55:46,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:46,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:46,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:46,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:46,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:46,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:46,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:46,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:46,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 09:55:46,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 47 [2021-12-21 09:55:47,033 INFO L353 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2021-12-21 09:55:47,033 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 26 treesize of output 31 [2021-12-21 09:55:47,122 INFO L353 Elim1Store]: treesize reduction 480, result has 8.7 percent of original size [2021-12-21 09:55:47,122 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 4 case distinctions, treesize of input 56 treesize of output 67 [2021-12-21 09:55:47,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 09:55:47,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-21 09:55:47,580 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 17 treesize of output 10 [2021-12-21 09:55:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 35 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 09:55:47,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:55:50,027 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_1734 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 20) (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_1734) (+ 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (let ((.cse1 (div c_~CELLCOUNT~0 5))) (let ((.cse0 (<= (+ |ULTIMATE.start_main_~i~0#1| 1) .cse1))) (and (or .cse0 (< c_~CELLCOUNT~0 0)) (or .cse0 (not (= (mod c_~CELLCOUNT~0 5) 0))) (<= |ULTIMATE.start_main_~i~0#1| .cse1)))))) is different from false [2021-12-21 09:55:50,280 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 57 treesize of output 55 [2021-12-21 09:55:50,293 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 886760 treesize of output 884712 [2021-12-21 09:56:01,041 WARN L227 SmtUtils]: Spent 5.61s on a formula simplification. DAG size of input: 838 DAG size of output: 838 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-21 09:56:10,986 WARN L227 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 826 DAG size of output: 826 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)