./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/pnr3.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:23:16,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:23:16,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:23:16,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:23:16,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:23:16,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:23:16,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:23:16,797 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:23:16,798 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:23:16,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:23:16,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:23:16,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:23:16,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:23:16,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:23:16,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:23:16,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:23:16,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:23:16,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:23:16,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:23:16,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:23:16,816 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:23:16,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:23:16,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:23:16,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:23:16,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:23:16,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:23:16,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:23:16,822 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:23:16,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:23:16,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:23:16,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:23:16,823 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:23:16,824 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:23:16,825 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:23:16,825 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:23:16,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:23:16,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:23:16,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:23:16,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:23:16,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:23:16,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:23:16,829 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:23:16,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:23:16,853 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:23:16,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:23:16,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:23:16,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:23:16,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:23:16,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:23:16,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:23:16,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:23:16,856 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:23:16,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:23:16,857 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:23:16,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:23:16,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:23:16,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:23:16,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:23:16,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:23:16,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:23:16,858 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:23:16,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:23:16,859 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:23:16,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:23:16,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:23:16,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:23:16,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:23:16,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:23:16,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:23:16,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:23:16,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:23:16,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:23:16,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:23:16,861 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:23:16,861 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:23:16,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:23:16,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2022-07-11 22:23:17,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:23:17,044 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:23:17,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:23:17,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:23:17,047 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:23:17,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr3.c [2022-07-11 22:23:17,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa6dabe89/ce28ca8973b440f5b746dd6b37533f3e/FLAG97fa1f734 [2022-07-11 22:23:17,465 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:23:17,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c [2022-07-11 22:23:17,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa6dabe89/ce28ca8973b440f5b746dd6b37533f3e/FLAG97fa1f734 [2022-07-11 22:23:17,485 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa6dabe89/ce28ca8973b440f5b746dd6b37533f3e [2022-07-11 22:23:17,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:23:17,488 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:23:17,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:23:17,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:23:17,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:23:17,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4031a3fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17, skipping insertion in model container [2022-07-11 22:23:17,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:23:17,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:23:17,691 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2022-07-11 22:23:17,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:23:17,738 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:23:17,748 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2022-07-11 22:23:17,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:23:17,777 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:23:17,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17 WrapperNode [2022-07-11 22:23:17,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:23:17,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:23:17,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:23:17,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:23:17,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,798 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,810 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2022-07-11 22:23:17,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:23:17,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:23:17,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:23:17,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:23:17,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,818 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:23:17,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:23:17,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:23:17,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:23:17,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (1/1) ... [2022-07-11 22:23:17,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:23:17,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:17,863 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 22:23:17,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 22:23:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:23:17,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:23:17,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:23:17,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 22:23:17,890 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-11 22:23:17,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-11 22:23:17,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:23:17,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:23:17,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:23:17,930 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:23:17,931 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:23:18,099 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:23:18,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:23:18,103 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 22:23:18,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:23:18 BoogieIcfgContainer [2022-07-11 22:23:18,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:23:18,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:23:18,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:23:18,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:23:18,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:23:17" (1/3) ... [2022-07-11 22:23:18,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d89e26f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:23:18, skipping insertion in model container [2022-07-11 22:23:18,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:23:17" (2/3) ... [2022-07-11 22:23:18,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d89e26f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:23:18, skipping insertion in model container [2022-07-11 22:23:18,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:23:18" (3/3) ... [2022-07-11 22:23:18,110 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr3.c [2022-07-11 22:23:18,120 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:23:18,120 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:23:18,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:23:18,185 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@41d5453, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@203f8d68 [2022-07-11 22:23:18,185 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:23:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:23:18,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-11 22:23:18,196 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:18,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:18,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:18,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1781049194, now seen corresponding path program 1 times [2022-07-11 22:23:18,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:18,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502375724] [2022-07-11 22:23:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:23:18,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:18,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502375724] [2022-07-11 22:23:18,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502375724] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:23:18,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:23:18,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 22:23:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826249537] [2022-07-11 22:23:18,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:23:18,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 22:23:18,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:18,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 22:23:18,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:23:18,439 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:23:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:18,458 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-07-11 22:23:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 22:23:18,461 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-11 22:23:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:18,465 INFO L225 Difference]: With dead ends: 57 [2022-07-11 22:23:18,465 INFO L226 Difference]: Without dead ends: 27 [2022-07-11 22:23:18,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:23:18,471 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:18,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:23:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-11 22:23:18,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-11 22:23:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:23:18,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-11 22:23:18,503 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2022-07-11 22:23:18,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:18,504 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-11 22:23:18,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:23:18,504 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-11 22:23:18,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-11 22:23:18,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:18,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:18,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:23:18,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:18,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:18,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1807831303, now seen corresponding path program 1 times [2022-07-11 22:23:18,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:18,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646859810] [2022-07-11 22:23:18,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:18,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:23:18,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:18,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646859810] [2022-07-11 22:23:18,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646859810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:23:18,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:23:18,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 22:23:18,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519618003] [2022-07-11 22:23:18,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:23:18,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 22:23:18,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 22:23:18,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:23:18,707 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:23:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:18,782 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-11 22:23:18,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 22:23:18,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-11 22:23:18,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:18,783 INFO L225 Difference]: With dead ends: 45 [2022-07-11 22:23:18,785 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 22:23:18,787 INFO L412 NwaCegarLoop]: 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 [2022-07-11 22:23:18,789 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:18,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:23:18,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 22:23:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-11 22:23:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:23:18,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-11 22:23:18,804 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2022-07-11 22:23:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:18,805 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-11 22:23:18,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:23:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-11 22:23:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-11 22:23:18,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:18,810 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:18,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 22:23:18,810 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:18,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1367310263, now seen corresponding path program 1 times [2022-07-11 22:23:18,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:18,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594139431] [2022-07-11 22:23:18,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:18,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:18,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:18,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594139431] [2022-07-11 22:23:18,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594139431] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:18,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222243597] [2022-07-11 22:23:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:18,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:18,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:18,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:19,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:23:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:19,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-11 22:23:19,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:19,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:19,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:19,127 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:23:19,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:19,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-07-11 22:23:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:19,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:19,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-11 22:23:19,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-11 22:23:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:19,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222243597] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:19,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:19,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2022-07-11 22:23:19,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254931485] [2022-07-11 22:23:19,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:19,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 22:23:19,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:19,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 22:23:19,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-11 22:23:19,258 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 22:23:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:19,442 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2022-07-11 22:23:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 22:23:19,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-07-11 22:23:19,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:19,444 INFO L225 Difference]: With dead ends: 84 [2022-07-11 22:23:19,444 INFO L226 Difference]: Without dead ends: 82 [2022-07-11 22:23:19,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:23:19,445 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:19,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 181 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:23:19,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-11 22:23:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2022-07-11 22:23:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 22:23:19,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-07-11 22:23:19,451 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 31 [2022-07-11 22:23:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:19,452 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-07-11 22:23:19,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 22:23:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-07-11 22:23:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-11 22:23:19,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:19,453 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:19,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 22:23:19,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:19,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1238713291, now seen corresponding path program 1 times [2022-07-11 22:23:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:19,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635455955] [2022-07-11 22:23:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:19,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:19,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:19,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:19,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:19,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635455955] [2022-07-11 22:23:19,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635455955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403913995] [2022-07-11 22:23:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:19,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:19,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:19,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:19,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:23:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:19,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-11 22:23:19,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:20,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:20,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:20,090 INFO L390 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 [2022-07-11 22:23:20,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:20,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-11 22:23:20,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:23:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:20,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:20,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-11 22:23:20,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-11 22:23:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:20,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403913995] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:20,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:20,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-11 22:23:20,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504890408] [2022-07-11 22:23:20,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:20,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 22:23:20,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:20,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 22:23:20,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:23:20,713 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-11 22:23:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:21,332 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2022-07-11 22:23:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-11 22:23:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 31 [2022-07-11 22:23:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:21,335 INFO L225 Difference]: With dead ends: 137 [2022-07-11 22:23:21,335 INFO L226 Difference]: Without dead ends: 135 [2022-07-11 22:23:21,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2022-07-11 22:23:21,336 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 194 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:21,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 409 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 385 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-11 22:23:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-11 22:23:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 63. [2022-07-11 22:23:21,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3125) internal successors, (63), 49 states have internal predecessors, (63), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-11 22:23:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2022-07-11 22:23:21,345 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 31 [2022-07-11 22:23:21,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:21,346 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2022-07-11 22:23:21,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-11 22:23:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2022-07-11 22:23:21,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-11 22:23:21,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:21,347 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:21,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-11 22:23:21,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-11 22:23:21,560 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:21,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2026411713, now seen corresponding path program 1 times [2022-07-11 22:23:21,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:21,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611287726] [2022-07-11 22:23:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:21,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:21,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:21,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:21,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:21,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:21,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:21,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611287726] [2022-07-11 22:23:21,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611287726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:21,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857406548] [2022-07-11 22:23:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:21,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:21,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:21,690 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:21,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:23:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:21,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-11 22:23:21,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:21,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:21,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:21,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-07-11 22:23:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:21,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:21,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:21,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:21,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857406548] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:21,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:21,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-11 22:23:21,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496333660] [2022-07-11 22:23:21,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:21,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 22:23:21,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:21,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 22:23:21,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-11 22:23:21,922 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 22:23:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:22,178 INFO L93 Difference]: Finished difference Result 202 states and 292 transitions. [2022-07-11 22:23:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-11 22:23:22,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-07-11 22:23:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:22,180 INFO L225 Difference]: With dead ends: 202 [2022-07-11 22:23:22,180 INFO L226 Difference]: Without dead ends: 200 [2022-07-11 22:23:22,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-11 22:23:22,181 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 83 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:22,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 265 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:23:22,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-11 22:23:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 105. [2022-07-11 22:23:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.35) internal successors, (108), 82 states have internal predecessors, (108), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-11 22:23:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2022-07-11 22:23:22,197 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 35 [2022-07-11 22:23:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:22,197 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2022-07-11 22:23:22,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 22:23:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2022-07-11 22:23:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-11 22:23:22,198 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:22,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:22,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:22,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:22,414 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:22,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:22,415 INFO L85 PathProgramCache]: Analyzing trace with hash 680207681, now seen corresponding path program 1 times [2022-07-11 22:23:22,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:22,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783372965] [2022-07-11 22:23:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:22,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:22,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:22,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783372965] [2022-07-11 22:23:22,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783372965] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:22,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085729786] [2022-07-11 22:23:22,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:22,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:22,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:22,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:22,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:23:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:22,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-11 22:23:22,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:22,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:22,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:22,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 22:23:22,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:23:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:23:22,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:22,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:22,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:23:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:22,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085729786] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:22,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:22,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-07-11 22:23:22,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412972285] [2022-07-11 22:23:22,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:22,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 22:23:22,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:22,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 22:23:22,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:23:22,952 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-11 22:23:23,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:23,547 INFO L93 Difference]: Finished difference Result 318 states and 449 transitions. [2022-07-11 22:23:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-11 22:23:23,547 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 35 [2022-07-11 22:23:23,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:23,549 INFO L225 Difference]: With dead ends: 318 [2022-07-11 22:23:23,549 INFO L226 Difference]: Without dead ends: 316 [2022-07-11 22:23:23,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2022-07-11 22:23:23,550 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 175 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:23,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 450 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 482 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-07-11 22:23:23,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-11 22:23:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 148. [2022-07-11 22:23:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 110 states have (on average 1.3727272727272728) internal successors, (151), 113 states have internal predecessors, (151), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-11 22:23:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 217 transitions. [2022-07-11 22:23:23,575 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 217 transitions. Word has length 35 [2022-07-11 22:23:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:23,575 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 217 transitions. [2022-07-11 22:23:23,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-11 22:23:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 217 transitions. [2022-07-11 22:23:23,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 22:23:23,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:23,576 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:23,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:23,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:23,794 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:23,797 INFO L85 PathProgramCache]: Analyzing trace with hash -406526155, now seen corresponding path program 2 times [2022-07-11 22:23:23,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:23,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545769325] [2022-07-11 22:23:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:23,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:23,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:23,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545769325] [2022-07-11 22:23:23,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545769325] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:23,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223722560] [2022-07-11 22:23:23,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:23:23,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:23,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:23,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:23,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:23:23,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:23:23,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:23,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 22:23:23,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:23,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 22:23:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:24,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:24,051 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:24,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:24,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223722560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:24,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:24,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-11 22:23:24,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457448059] [2022-07-11 22:23:24,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:24,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-11 22:23:24,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:24,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-11 22:23:24,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-11 22:23:24,073 INFO L87 Difference]: Start difference. First operand 148 states and 217 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:23:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:24,504 INFO L93 Difference]: Finished difference Result 629 states and 954 transitions. [2022-07-11 22:23:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-11 22:23:24,504 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-11 22:23:24,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:24,507 INFO L225 Difference]: With dead ends: 629 [2022-07-11 22:23:24,507 INFO L226 Difference]: Without dead ends: 627 [2022-07-11 22:23:24,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:23:24,508 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 65 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:24,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 314 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 22:23:24,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-07-11 22:23:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 337. [2022-07-11 22:23:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 252 states have (on average 1.4206349206349207) internal successors, (358), 252 states have internal predecessors, (358), 80 states have call successors, (80), 4 states have call predecessors, (80), 4 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-07-11 22:23:24,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 518 transitions. [2022-07-11 22:23:24,561 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 518 transitions. Word has length 39 [2022-07-11 22:23:24,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:24,561 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 518 transitions. [2022-07-11 22:23:24,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 22:23:24,562 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 518 transitions. [2022-07-11 22:23:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-11 22:23:24,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:24,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:24,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-11 22:23:24,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:24,780 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:24,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1686389833, now seen corresponding path program 1 times [2022-07-11 22:23:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:24,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926152446] [2022-07-11 22:23:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:24,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:24,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:24,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:24,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:24,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:24,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:24,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926152446] [2022-07-11 22:23:24,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926152446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:24,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365872669] [2022-07-11 22:23:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:24,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:24,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:24,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:23:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:24,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-11 22:23:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:25,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 22:23:25,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:23:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:25,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:25,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:25,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:23:25,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365872669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:25,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:25,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-07-11 22:23:25,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139167506] [2022-07-11 22:23:25,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:25,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-11 22:23:25,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:25,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-11 22:23:25,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-11 22:23:25,253 INFO L87 Difference]: Start difference. First operand 337 states and 518 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:23:26,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:26,118 INFO L93 Difference]: Finished difference Result 699 states and 1051 transitions. [2022-07-11 22:23:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-11 22:23:26,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-07-11 22:23:26,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:26,121 INFO L225 Difference]: With dead ends: 699 [2022-07-11 22:23:26,121 INFO L226 Difference]: Without dead ends: 697 [2022-07-11 22:23:26,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1913, Unknown=0, NotChecked=0, Total=2352 [2022-07-11 22:23:26,122 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 171 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:26,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 327 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 22:23:26,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-07-11 22:23:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 160. [2022-07-11 22:23:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 125 states have internal predecessors, (165), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-11 22:23:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 231 transitions. [2022-07-11 22:23:26,143 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 231 transitions. Word has length 39 [2022-07-11 22:23:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:26,143 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 231 transitions. [2022-07-11 22:23:26,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-11 22:23:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 231 transitions. [2022-07-11 22:23:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 22:23:26,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:26,144 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:26,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:26,358 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:26,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash 685144619, now seen corresponding path program 3 times [2022-07-11 22:23:26,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:26,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395241920] [2022-07-11 22:23:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:26,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:26,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:26,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:26,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:26,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:26,508 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:26,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395241920] [2022-07-11 22:23:26,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395241920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:26,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520035350] [2022-07-11 22:23:26,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:23:26,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:26,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:26,510 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:26,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:23:26,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 22:23:26,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:26,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 22:23:26,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:26,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-11 22:23:26,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520035350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:26,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:26,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-07-11 22:23:26,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722822931] [2022-07-11 22:23:26,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:26,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-11 22:23:26,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-11 22:23:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2022-07-11 22:23:26,923 INFO L87 Difference]: Start difference. First operand 160 states and 231 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-11 22:23:27,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:27,188 INFO L93 Difference]: Finished difference Result 267 states and 383 transitions. [2022-07-11 22:23:27,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 22:23:27,190 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2022-07-11 22:23:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:27,191 INFO L225 Difference]: With dead ends: 267 [2022-07-11 22:23:27,191 INFO L226 Difference]: Without dead ends: 247 [2022-07-11 22:23:27,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2022-07-11 22:23:27,192 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 272 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:27,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 144 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:23:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-11 22:23:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 177. [2022-07-11 22:23:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-11 22:23:27,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2022-07-11 22:23:27,210 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 43 [2022-07-11 22:23:27,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:27,211 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2022-07-11 22:23:27,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-11 22:23:27,211 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2022-07-11 22:23:27,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-11 22:23:27,211 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:27,212 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:27,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:27,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:27,428 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:27,428 INFO L85 PathProgramCache]: Analyzing trace with hash 466828189, now seen corresponding path program 2 times [2022-07-11 22:23:27,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:27,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563339089] [2022-07-11 22:23:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:27,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:27,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:27,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:27,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:27,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:23:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:27,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:23:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:27,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563339089] [2022-07-11 22:23:27,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563339089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:27,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451041929] [2022-07-11 22:23:27,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:23:27,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:27,571 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:27,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:23:27,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:23:27,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:27,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-11 22:23:27,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:27,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:27,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:27,801 INFO L390 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 [2022-07-11 22:23:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:27,848 INFO L390 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 [2022-07-11 22:23:27,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:27,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:23:27,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:27,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:23:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:28,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:23:28,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:23:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:23:28,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:28,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451041929] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:28,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:28,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-11 22:23:28,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968953983] [2022-07-11 22:23:28,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:28,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-11 22:23:28,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-11 22:23:28,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2022-07-11 22:23:28,997 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-11 22:23:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:29,591 INFO L93 Difference]: Finished difference Result 242 states and 338 transitions. [2022-07-11 22:23:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 22:23:29,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2022-07-11 22:23:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:29,593 INFO L225 Difference]: With dead ends: 242 [2022-07-11 22:23:29,593 INFO L226 Difference]: Without dead ends: 240 [2022-07-11 22:23:29,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=237, Invalid=1168, Unknown=1, NotChecked=0, Total=1406 [2022-07-11 22:23:29,594 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:29,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 315 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 399 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-07-11 22:23:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-11 22:23:29,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 141. [2022-07-11 22:23:29,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 110 states have (on average 1.3) internal successors, (143), 110 states have internal predecessors, (143), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-11 22:23:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2022-07-11 22:23:29,612 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 51 [2022-07-11 22:23:29,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:29,612 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2022-07-11 22:23:29,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-11 22:23:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2022-07-11 22:23:29,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-11 22:23:29,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:29,614 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:29,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-11 22:23:29,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-11 22:23:29,820 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:29,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1257132653, now seen corresponding path program 2 times [2022-07-11 22:23:29,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:29,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285665524] [2022-07-11 22:23:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:29,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:29,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:29,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:29,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:29,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:29,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:23:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:29,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:23:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:29,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:29,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285665524] [2022-07-11 22:23:29,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285665524] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:29,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652906037] [2022-07-11 22:23:29,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:23:29,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:29,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:29,968 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:29,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:23:30,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:23:30,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:30,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-11 22:23:30,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:30,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:30,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:30,138 INFO L390 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 [2022-07-11 22:23:30,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:30,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:23:30,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:30,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:23:30,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:23:30,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:23:30,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 22:23:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 22:23:30,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:30,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652906037] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:30,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:30,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-11 22:23:30,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417665045] [2022-07-11 22:23:30,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:30,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-11 22:23:30,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:30,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-11 22:23:30,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=391, Unknown=1, NotChecked=0, Total=462 [2022-07-11 22:23:30,873 INFO L87 Difference]: Start difference. First operand 141 states and 193 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-11 22:23:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:31,452 INFO L93 Difference]: Finished difference Result 204 states and 277 transitions. [2022-07-11 22:23:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-11 22:23:31,452 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 55 [2022-07-11 22:23:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:31,454 INFO L225 Difference]: With dead ends: 204 [2022-07-11 22:23:31,454 INFO L226 Difference]: Without dead ends: 202 [2022-07-11 22:23:31,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=1435, Unknown=1, NotChecked=0, Total=1722 [2022-07-11 22:23:31,456 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 144 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:31,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 333 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 434 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-07-11 22:23:31,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-11 22:23:31,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 78. [2022-07-11 22:23:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-11 22:23:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2022-07-11 22:23:31,470 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 55 [2022-07-11 22:23:31,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:31,470 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2022-07-11 22:23:31,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-11 22:23:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2022-07-11 22:23:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-11 22:23:31,471 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:31,471 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:31,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:31,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:31,677 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:31,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:31,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1929317243, now seen corresponding path program 4 times [2022-07-11 22:23:31,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:31,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794787250] [2022-07-11 22:23:31,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:31,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:31,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:23:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:23:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:31,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:31,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794787250] [2022-07-11 22:23:31,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794787250] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:31,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867003761] [2022-07-11 22:23:31,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:23:31,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:31,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:31,884 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:31,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:23:31,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:23:31,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:32,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-11 22:23:32,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:32,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:32,062 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:32,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:23:32,076 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:23:32,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-11 22:23:32,151 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:32,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:32,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:32,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:32,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867003761] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:32,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:32,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-07-11 22:23:32,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805616170] [2022-07-11 22:23:32,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:32,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 22:23:32,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 22:23:32,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-07-11 22:23:32,274 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-07-11 22:23:33,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:33,811 INFO L93 Difference]: Finished difference Result 688 states and 1044 transitions. [2022-07-11 22:23:33,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-11 22:23:33,812 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 63 [2022-07-11 22:23:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:33,814 INFO L225 Difference]: With dead ends: 688 [2022-07-11 22:23:33,814 INFO L226 Difference]: Without dead ends: 686 [2022-07-11 22:23:33,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=682, Invalid=3874, Unknown=0, NotChecked=0, Total=4556 [2022-07-11 22:23:33,816 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 273 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:33,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 866 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-11 22:23:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-07-11 22:23:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 133. [2022-07-11 22:23:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 103 states have internal predecessors, (134), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-11 22:23:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 186 transitions. [2022-07-11 22:23:33,847 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 186 transitions. Word has length 63 [2022-07-11 22:23:33,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:33,847 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 186 transitions. [2022-07-11 22:23:33,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-07-11 22:23:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 186 transitions. [2022-07-11 22:23:33,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-11 22:23:33,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:33,848 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:33,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-11 22:23:34,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-11 22:23:34,062 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:34,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1664050179, now seen corresponding path program 1 times [2022-07-11 22:23:34,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:34,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218142373] [2022-07-11 22:23:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:34,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:34,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:34,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:34,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:34,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:34,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:34,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:23:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:34,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:23:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:34,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:34,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218142373] [2022-07-11 22:23:34,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218142373] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:34,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780909426] [2022-07-11 22:23:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:34,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:34,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:34,228 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:34,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:23:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:34,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 22:23:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:34,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:34,439 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:34,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:23:34,494 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:23:34,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 22:23:34,616 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:23:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 22:23:34,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:37,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:37,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:23:37,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780909426] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:37,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:37,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-07-11 22:23:37,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661048538] [2022-07-11 22:23:37,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:37,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-11 22:23:37,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:37,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-11 22:23:37,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=623, Unknown=1, NotChecked=0, Total=702 [2022-07-11 22:23:37,248 INFO L87 Difference]: Start difference. First operand 133 states and 186 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-11 22:23:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:38,184 INFO L93 Difference]: Finished difference Result 327 states and 444 transitions. [2022-07-11 22:23:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-11 22:23:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 63 [2022-07-11 22:23:38,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:38,200 INFO L225 Difference]: With dead ends: 327 [2022-07-11 22:23:38,200 INFO L226 Difference]: Without dead ends: 325 [2022-07-11 22:23:38,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=459, Invalid=3446, Unknown=1, NotChecked=0, Total=3906 [2022-07-11 22:23:38,205 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 235 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:38,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 663 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 956 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-07-11 22:23:38,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-11 22:23:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 161. [2022-07-11 22:23:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 122 states have (on average 1.3278688524590163) internal successors, (162), 123 states have internal predecessors, (162), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-11 22:23:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 226 transitions. [2022-07-11 22:23:38,250 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 226 transitions. Word has length 63 [2022-07-11 22:23:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:38,250 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 226 transitions. [2022-07-11 22:23:38,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-11 22:23:38,250 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 226 transitions. [2022-07-11 22:23:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 22:23:38,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:38,252 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:38,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:38,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-11 22:23:38,467 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:38,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2043081871, now seen corresponding path program 5 times [2022-07-11 22:23:38,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:38,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884198108] [2022-07-11 22:23:38,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:38,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:38,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:38,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:38,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:38,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:38,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:23:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:38,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:23:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:38,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:38,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884198108] [2022-07-11 22:23:38,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884198108] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:38,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732945206] [2022-07-11 22:23:38,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:23:38,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:38,579 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:38,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 22:23:38,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-11 22:23:38,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:38,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-11 22:23:38,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:38,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:38,736 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:38,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:23:38,840 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:23:38,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:23:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:38,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:38,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:38,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:38,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732945206] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:38,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:38,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-07-11 22:23:38,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807984566] [2022-07-11 22:23:38,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:38,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-11 22:23:38,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:38,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-11 22:23:38,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-07-11 22:23:38,946 INFO L87 Difference]: Start difference. First operand 161 states and 226 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-11 22:23:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:41,151 INFO L93 Difference]: Finished difference Result 1723 states and 2679 transitions. [2022-07-11 22:23:41,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-11 22:23:41,151 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2022-07-11 22:23:41,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:41,157 INFO L225 Difference]: With dead ends: 1723 [2022-07-11 22:23:41,158 INFO L226 Difference]: Without dead ends: 1721 [2022-07-11 22:23:41,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=721, Invalid=5441, Unknown=0, NotChecked=0, Total=6162 [2022-07-11 22:23:41,160 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 173 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:41,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1048 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-11 22:23:41,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-07-11 22:23:41,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 347. [2022-07-11 22:23:41,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 262 states have (on average 1.3854961832061068) internal successors, (363), 263 states have internal predecessors, (363), 78 states have call successors, (78), 6 states have call predecessors, (78), 6 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-11 22:23:41,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 519 transitions. [2022-07-11 22:23:41,280 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 519 transitions. Word has length 67 [2022-07-11 22:23:41,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:41,280 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 519 transitions. [2022-07-11 22:23:41,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-11 22:23:41,281 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 519 transitions. [2022-07-11 22:23:41,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 22:23:41,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:41,282 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:41,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:41,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 22:23:41,495 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:41,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash -656878477, now seen corresponding path program 1 times [2022-07-11 22:23:41,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:41,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686667070] [2022-07-11 22:23:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:41,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:41,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:41,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:41,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:41,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:41,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:41,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:23:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:41,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:23:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:41,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:41,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686667070] [2022-07-11 22:23:41,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686667070] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:41,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619737319] [2022-07-11 22:23:41,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:41,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:41,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:41,630 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:41,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 22:23:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:41,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 22:23:41,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:41,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:41,901 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:23:41,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 22:23:42,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:23:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-11 22:23:42,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:42,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:42,214 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:23:42,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619737319] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:42,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:42,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-11 22:23:42,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847311541] [2022-07-11 22:23:42,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:42,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 22:23:42,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:42,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 22:23:42,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-07-11 22:23:42,260 INFO L87 Difference]: Start difference. First operand 347 states and 519 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-11 22:23:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:44,470 INFO L93 Difference]: Finished difference Result 1529 states and 2319 transitions. [2022-07-11 22:23:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-11 22:23:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 67 [2022-07-11 22:23:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:44,476 INFO L225 Difference]: With dead ends: 1529 [2022-07-11 22:23:44,476 INFO L226 Difference]: Without dead ends: 1527 [2022-07-11 22:23:44,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=778, Invalid=6704, Unknown=0, NotChecked=0, Total=7482 [2022-07-11 22:23:44,480 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 397 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:44,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 931 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 1663 Invalid, 0 Unknown, 127 Unchecked, 0.9s Time] [2022-07-11 22:23:44,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2022-07-11 22:23:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 425. [2022-07-11 22:23:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 318 states have (on average 1.3930817610062893) internal successors, (443), 319 states have internal predecessors, (443), 96 states have call successors, (96), 10 states have call predecessors, (96), 10 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-11 22:23:44,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 635 transitions. [2022-07-11 22:23:44,608 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 635 transitions. Word has length 67 [2022-07-11 22:23:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:44,608 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 635 transitions. [2022-07-11 22:23:44,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-11 22:23:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 635 transitions. [2022-07-11 22:23:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 22:23:44,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:44,609 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:44,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:44,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-11 22:23:44,824 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:44,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1810243687, now seen corresponding path program 6 times [2022-07-11 22:23:44,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:44,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983038747] [2022-07-11 22:23:44,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:44,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:44,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:44,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:44,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:44,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:44,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:44,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:23:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:44,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:23:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:44,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:44,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983038747] [2022-07-11 22:23:44,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983038747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:44,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610821989] [2022-07-11 22:23:44,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:23:44,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:44,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:44,924 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:44,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 22:23:44,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-11 22:23:44,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:44,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-11 22:23:44,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:45,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 22:23:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:45,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:45,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-11 22:23:45,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-07-11 22:23:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:45,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610821989] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:45,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:45,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-07-11 22:23:45,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463949231] [2022-07-11 22:23:45,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:45,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 22:23:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 22:23:45,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:23:45,320 INFO L87 Difference]: Start difference. First operand 425 states and 635 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-11 22:23:51,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:51,915 INFO L93 Difference]: Finished difference Result 7738 states and 12276 transitions. [2022-07-11 22:23:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-07-11 22:23:51,916 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-07-11 22:23:51,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:51,938 INFO L225 Difference]: With dead ends: 7738 [2022-07-11 22:23:51,939 INFO L226 Difference]: Without dead ends: 7736 [2022-07-11 22:23:51,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12150 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2970, Invalid=26786, Unknown=0, NotChecked=0, Total=29756 [2022-07-11 22:23:51,944 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 484 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 5186 mSolverCounterSat, 1614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 7525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1614 IncrementalHoareTripleChecker+Valid, 5186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:51,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 2201 Invalid, 7525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1614 Valid, 5186 Invalid, 0 Unknown, 725 Unchecked, 2.4s Time] [2022-07-11 22:23:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7736 states. [2022-07-11 22:23:52,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7736 to 1019. [2022-07-11 22:23:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 758 states have (on average 1.4313984168865435) internal successors, (1085), 759 states have internal predecessors, (1085), 250 states have call successors, (250), 10 states have call predecessors, (250), 10 states have return successors, (250), 249 states have call predecessors, (250), 250 states have call successors, (250) [2022-07-11 22:23:52,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1585 transitions. [2022-07-11 22:23:52,377 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1585 transitions. Word has length 71 [2022-07-11 22:23:52,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:52,378 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1585 transitions. [2022-07-11 22:23:52,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-11 22:23:52,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1585 transitions. [2022-07-11 22:23:52,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-11 22:23:52,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:52,379 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:52,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:52,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:52,585 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:52,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash -561495575, now seen corresponding path program 1 times [2022-07-11 22:23:52,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:52,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299009980] [2022-07-11 22:23:52,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:52,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:52,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:52,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:52,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:52,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:52,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:52,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:23:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:52,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:23:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:52,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:52,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299009980] [2022-07-11 22:23:52,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299009980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:52,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364965387] [2022-07-11 22:23:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:52,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:52,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:52,739 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:52,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 22:23:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:52,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-11 22:23:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:52,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-11 22:23:53,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:23:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:53,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:53,327 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:53,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:23:53,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364965387] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:53,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:23:53,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2022-07-11 22:23:53,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157213819] [2022-07-11 22:23:53,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:53,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 22:23:53,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:53,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 22:23:53,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 22:23:53,358 INFO L87 Difference]: Start difference. First operand 1019 states and 1585 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-11 22:23:55,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:55,985 INFO L93 Difference]: Finished difference Result 2343 states and 3582 transitions. [2022-07-11 22:23:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-11 22:23:55,985 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-07-11 22:23:55,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:55,992 INFO L225 Difference]: With dead ends: 2343 [2022-07-11 22:23:55,992 INFO L226 Difference]: Without dead ends: 2341 [2022-07-11 22:23:55,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3026 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1287, Invalid=8613, Unknown=0, NotChecked=0, Total=9900 [2022-07-11 22:23:55,993 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 291 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:55,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 986 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 22:23:55,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-07-11 22:23:56,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 461. [2022-07-11 22:23:56,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 354 states have (on average 1.3587570621468927) internal successors, (481), 355 states have internal predecessors, (481), 96 states have call successors, (96), 10 states have call predecessors, (96), 10 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-11 22:23:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 673 transitions. [2022-07-11 22:23:56,152 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 673 transitions. Word has length 71 [2022-07-11 22:23:56,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:56,153 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 673 transitions. [2022-07-11 22:23:56,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-11 22:23:56,153 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 673 transitions. [2022-07-11 22:23:56,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-11 22:23:56,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:56,154 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:56,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:56,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-11 22:23:56,370 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:56,371 INFO L85 PathProgramCache]: Analyzing trace with hash -629945763, now seen corresponding path program 7 times [2022-07-11 22:23:56,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:56,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942712228] [2022-07-11 22:23:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:56,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:56,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:56,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:56,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:56,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:56,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:23:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:56,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:23:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 34 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:56,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:56,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942712228] [2022-07-11 22:23:56,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942712228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:56,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496397845] [2022-07-11 22:23:56,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:23:56,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:56,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:56,611 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:56,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-11 22:23:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:56,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 22:23:56,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:57,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-11 22:23:57,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496397845] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:57,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:57,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2022-07-11 22:23:57,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930141797] [2022-07-11 22:23:57,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:57,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-11 22:23:57,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:57,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-11 22:23:57,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2022-07-11 22:23:57,334 INFO L87 Difference]: Start difference. First operand 461 states and 673 transitions. Second operand has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-11 22:23:57,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:23:57,780 INFO L93 Difference]: Finished difference Result 537 states and 775 transitions. [2022-07-11 22:23:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 22:23:57,781 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 75 [2022-07-11 22:23:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:23:57,785 INFO L225 Difference]: With dead ends: 537 [2022-07-11 22:23:57,785 INFO L226 Difference]: Without dead ends: 505 [2022-07-11 22:23:57,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2022-07-11 22:23:57,796 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:23:57,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 205 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:23:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-11 22:23:58,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 471. [2022-07-11 22:23:58,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 362 states have (on average 1.339779005524862) internal successors, (485), 363 states have internal predecessors, (485), 98 states have call successors, (98), 10 states have call predecessors, (98), 10 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2022-07-11 22:23:58,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 681 transitions. [2022-07-11 22:23:58,004 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 681 transitions. Word has length 75 [2022-07-11 22:23:58,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:23:58,004 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 681 transitions. [2022-07-11 22:23:58,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-11 22:23:58,005 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 681 transitions. [2022-07-11 22:23:58,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-11 22:23:58,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:23:58,006 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:23:58,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-11 22:23:58,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-11 22:23:58,222 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:23:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:23:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash 159587245, now seen corresponding path program 8 times [2022-07-11 22:23:58,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:23:58,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137338955] [2022-07-11 22:23:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:23:58,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:23:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:58,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:23:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:58,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:23:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:58,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:23:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:58,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:23:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:58,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:23:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:58,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:23:58,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:58,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 22:23:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:58,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-11 22:23:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:58,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-11 22:23:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:23:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:23:58,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:23:58,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137338955] [2022-07-11 22:23:58,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137338955] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:23:58,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000909324] [2022-07-11 22:23:58,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:23:58,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:23:58,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:23:58,373 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:23:58,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-11 22:23:58,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:23:58,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:23:58,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-11 22:23:58,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:23:58,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:23:58,527 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:58,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:23:58,547 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:23:58,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:23:58,719 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:23:58,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:23:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:23:58,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:23:58,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:23:58,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:23:58,889 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:23:58,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000909324] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:23:58,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:23:58,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2022-07-11 22:23:58,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371125368] [2022-07-11 22:23:58,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:23:58,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 22:23:58,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:23:58,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 22:23:58,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-07-11 22:23:58,891 INFO L87 Difference]: Start difference. First operand 471 states and 681 transitions. Second operand has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-11 22:24:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:24:12,424 INFO L93 Difference]: Finished difference Result 14381 states and 22875 transitions. [2022-07-11 22:24:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-07-11 22:24:12,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 95 [2022-07-11 22:24:12,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:24:12,463 INFO L225 Difference]: With dead ends: 14381 [2022-07-11 22:24:12,464 INFO L226 Difference]: Without dead ends: 14379 [2022-07-11 22:24:12,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 194 SyntacticMatches, 9 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34745 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5132, Invalid=72988, Unknown=0, NotChecked=0, Total=78120 [2022-07-11 22:24:12,471 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 450 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 10299 mSolverCounterSat, 2203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 3547 SdHoareTripleChecker+Invalid, 12502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2203 IncrementalHoareTripleChecker+Valid, 10299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:24:12,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 3547 Invalid, 12502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2203 Valid, 10299 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-07-11 22:24:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14379 states. [2022-07-11 22:24:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14379 to 1115. [2022-07-11 22:24:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 842 states have (on average 1.4097387173396674) internal successors, (1187), 843 states have internal predecessors, (1187), 262 states have call successors, (262), 10 states have call predecessors, (262), 10 states have return successors, (262), 261 states have call predecessors, (262), 262 states have call successors, (262) [2022-07-11 22:24:13,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1711 transitions. [2022-07-11 22:24:13,151 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1711 transitions. Word has length 95 [2022-07-11 22:24:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:24:13,151 INFO L495 AbstractCegarLoop]: Abstraction has 1115 states and 1711 transitions. [2022-07-11 22:24:13,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-11 22:24:13,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1711 transitions. [2022-07-11 22:24:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-11 22:24:13,154 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:24:13,155 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:24:13,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-11 22:24:13,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:13,358 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:24:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:24:13,358 INFO L85 PathProgramCache]: Analyzing trace with hash -737806033, now seen corresponding path program 2 times [2022-07-11 22:24:13,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:24:13,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440958232] [2022-07-11 22:24:13,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:24:13,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:24:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:24:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:24:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:24:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:24:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:24:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:24:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 22:24:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-11 22:24:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-11 22:24:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:24:13,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:24:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440958232] [2022-07-11 22:24:13,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440958232] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:13,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992605073] [2022-07-11 22:24:13,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:24:13,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:13,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:24:13,580 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:24:13,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-11 22:24:13,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:24:13,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:24:13,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-11 22:24:13,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:24:13,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:24:13,903 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:24:13,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:24:13,951 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:24:13,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 22:24:14,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:24:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 42 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-11 22:24:14,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:24:16,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:24:16,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:24:16,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992605073] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:16,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:24:16,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-07-11 22:24:16,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991495687] [2022-07-11 22:24:16,873 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:24:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-11 22:24:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:24:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-11 22:24:16,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1334, Unknown=1, NotChecked=0, Total=1482 [2022-07-11 22:24:16,875 INFO L87 Difference]: Start difference. First operand 1115 states and 1711 transitions. Second operand has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-11 22:24:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:24:30,104 INFO L93 Difference]: Finished difference Result 5383 states and 8417 transitions. [2022-07-11 22:24:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-11 22:24:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 95 [2022-07-11 22:24:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:24:30,126 INFO L225 Difference]: With dead ends: 5383 [2022-07-11 22:24:30,126 INFO L226 Difference]: Without dead ends: 5381 [2022-07-11 22:24:30,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4689 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1060, Invalid=11817, Unknown=5, NotChecked=0, Total=12882 [2022-07-11 22:24:30,129 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 475 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 4433 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 5460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 4433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-11 22:24:30,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 2263 Invalid, 5460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 4433 Invalid, 0 Unknown, 186 Unchecked, 1.8s Time] [2022-07-11 22:24:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2022-07-11 22:24:30,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 1253. [2022-07-11 22:24:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 942 states have (on average 1.4171974522292994) internal successors, (1335), 943 states have internal predecessors, (1335), 298 states have call successors, (298), 12 states have call predecessors, (298), 12 states have return successors, (298), 297 states have call predecessors, (298), 298 states have call successors, (298) [2022-07-11 22:24:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1931 transitions. [2022-07-11 22:24:30,695 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1931 transitions. Word has length 95 [2022-07-11 22:24:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:24:30,696 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 1931 transitions. [2022-07-11 22:24:30,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-11 22:24:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1931 transitions. [2022-07-11 22:24:30,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-11 22:24:30,698 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:24:30,698 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:24:30,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-11 22:24:30,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:30,911 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:24:30,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:24:30,912 INFO L85 PathProgramCache]: Analyzing trace with hash 519418531, now seen corresponding path program 9 times [2022-07-11 22:24:30,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:24:30,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925298969] [2022-07-11 22:24:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:24:30,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:24:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:31,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:24:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:31,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:24:31,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:31,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:24:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:31,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:24:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:31,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:24:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:31,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:24:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:31,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 22:24:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:31,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-11 22:24:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:31,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-11 22:24:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:24:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:24:31,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:24:31,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925298969] [2022-07-11 22:24:31,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925298969] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:24:31,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083735646] [2022-07-11 22:24:31,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:24:31,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:24:31,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:24:31,129 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:24:31,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-11 22:24:31,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-11 22:24:31,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:24:31,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-11 22:24:31,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:24:31,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:24:31,463 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:24:31,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-11 22:24:31,718 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:24:31,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:24:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:24:31,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:24:31,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:24:31,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:24:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:24:31,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083735646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:24:31,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:24:31,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-07-11 22:24:31,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263415400] [2022-07-11 22:24:31,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:24:31,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 22:24:31,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:24:31,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 22:24:31,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-07-11 22:24:31,900 INFO L87 Difference]: Start difference. First operand 1253 states and 1931 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-11 22:25:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:20,469 INFO L93 Difference]: Finished difference Result 56420 states and 90300 transitions. [2022-07-11 22:25:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 574 states. [2022-07-11 22:25:20,470 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 99 [2022-07-11 22:25:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:20,625 INFO L225 Difference]: With dead ends: 56420 [2022-07-11 22:25:20,625 INFO L226 Difference]: Without dead ends: 56418 [2022-07-11 22:25:20,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 201 SyntacticMatches, 8 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157170 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=15652, Invalid=317854, Unknown=0, NotChecked=0, Total=333506 [2022-07-11 22:25:20,660 INFO L413 NwaCegarLoop]: 1458 mSDtfsCounter, 690 mSDsluCounter, 6800 mSDsCounter, 0 mSdLazyCounter, 22735 mSolverCounterSat, 5125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 8258 SdHoareTripleChecker+Invalid, 27860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5125 IncrementalHoareTripleChecker+Valid, 22735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:20,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 8258 Invalid, 27860 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5125 Valid, 22735 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-07-11 22:25:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2022-07-11 22:25:23,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 3183. [2022-07-11 22:25:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 2368 states have (on average 1.4484797297297298) internal successors, (3430), 2369 states have internal predecessors, (3430), 802 states have call successors, (802), 12 states have call predecessors, (802), 12 states have return successors, (802), 801 states have call predecessors, (802), 802 states have call successors, (802) [2022-07-11 22:25:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 5034 transitions. [2022-07-11 22:25:23,507 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 5034 transitions. Word has length 99 [2022-07-11 22:25:23,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:23,508 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 5034 transitions. [2022-07-11 22:25:23,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-11 22:25:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 5034 transitions. [2022-07-11 22:25:23,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-11 22:25:23,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:23,515 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:23,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-11 22:25:23,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:23,731 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash 943065253, now seen corresponding path program 2 times [2022-07-11 22:25:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:23,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81656291] [2022-07-11 22:25:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:23,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:23,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:25:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:23,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:25:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:23,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:25:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:23,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:25:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:23,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:25:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:23,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:25:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:23,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 22:25:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:23,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-11 22:25:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:23,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-11 22:25:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:25:23,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81656291] [2022-07-11 22:25:23,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81656291] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:23,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938211088] [2022-07-11 22:25:23,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:25:23,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:23,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:23,937 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:25:23,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-11 22:25:24,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:25:24,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:25:24,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-11 22:25:24,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:24,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:24,295 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:25:24,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 22:25:24,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:25:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 24 proven. 134 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-11 22:25:24,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:24,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:25:24,806 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-11 22:25:24,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938211088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:24,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:25:24,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-11 22:25:24,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292114372] [2022-07-11 22:25:24,840 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:24,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-11 22:25:24,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:24,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-11 22:25:24,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2022-07-11 22:25:24,843 INFO L87 Difference]: Start difference. First operand 3183 states and 5034 transitions. Second operand has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-11 22:25:48,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:48,170 INFO L93 Difference]: Finished difference Result 19001 states and 30290 transitions. [2022-07-11 22:25:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-07-11 22:25:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 99 [2022-07-11 22:25:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:48,219 INFO L225 Difference]: With dead ends: 19001 [2022-07-11 22:25:48,219 INFO L226 Difference]: Without dead ends: 18999 [2022-07-11 22:25:48,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1569, Invalid=20183, Unknown=4, NotChecked=0, Total=21756 [2022-07-11 22:25:48,228 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 842 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 7218 mSolverCounterSat, 1382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2836 SdHoareTripleChecker+Invalid, 9031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1382 IncrementalHoareTripleChecker+Valid, 7218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:48,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 2836 Invalid, 9031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1382 Valid, 7218 Invalid, 0 Unknown, 431 Unchecked, 3.3s Time] [2022-07-11 22:25:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18999 states. [2022-07-11 22:25:50,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18999 to 3547. [2022-07-11 22:25:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 2632 states have (on average 1.452127659574468) internal successors, (3822), 2633 states have internal predecessors, (3822), 898 states have call successors, (898), 16 states have call predecessors, (898), 16 states have return successors, (898), 897 states have call predecessors, (898), 898 states have call successors, (898) [2022-07-11 22:25:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 5618 transitions. [2022-07-11 22:25:50,429 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 5618 transitions. Word has length 99 [2022-07-11 22:25:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:50,429 INFO L495 AbstractCegarLoop]: Abstraction has 3547 states and 5618 transitions. [2022-07-11 22:25:50,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-11 22:25:50,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 5618 transitions. [2022-07-11 22:25:50,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-11 22:25:50,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:50,433 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:50,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-11 22:25:50,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-11 22:25:50,650 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:25:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:25:50,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1220267295, now seen corresponding path program 3 times [2022-07-11 22:25:50,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:25:50,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022251239] [2022-07-11 22:25:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:25:50,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:25:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:25:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:25:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:25:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:25:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:25:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:25:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 22:25:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-11 22:25:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-11 22:25:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-11 22:25:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-11 22:25:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-11 22:25:50,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:25:50,949 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-11 22:25:50,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:25:50,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022251239] [2022-07-11 22:25:50,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022251239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:50,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038559977] [2022-07-11 22:25:50,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:25:50,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:25:50,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:25:50,964 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:25:50,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-11 22:25:51,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-11 22:25:51,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:25:51,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 22:25:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:25:51,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:25:51,353 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:25:51,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:25:51,404 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:25:51,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-11 22:25:51,475 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:25:51,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:25:51,525 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:25:51,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:25:51,575 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:25:51,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:25:51,639 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:25:51,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:25:51,679 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:25:51,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:25:51,718 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:25:51,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:25:51,852 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 22:25:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 106 proven. 78 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-11 22:25:51,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:25:54,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038559977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:25:54,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:25:54,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-11 22:25:54,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245275820] [2022-07-11 22:25:54,982 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:25:54,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 22:25:54,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:25:54,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 22:25:54,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=884, Unknown=2, NotChecked=0, Total=992 [2022-07-11 22:25:54,983 INFO L87 Difference]: Start difference. First operand 3547 states and 5618 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-11 22:25:58,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:25:58,193 INFO L93 Difference]: Finished difference Result 3783 states and 5859 transitions. [2022-07-11 22:25:58,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-11 22:25:58,193 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 103 [2022-07-11 22:25:58,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:25:58,201 INFO L225 Difference]: With dead ends: 3783 [2022-07-11 22:25:58,201 INFO L226 Difference]: Without dead ends: 3781 [2022-07-11 22:25:58,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 136 SyntacticMatches, 19 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=456, Invalid=3324, Unknown=2, NotChecked=0, Total=3782 [2022-07-11 22:25:58,203 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 204 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 22:25:58,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 688 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1052 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-07-11 22:25:58,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2022-07-11 22:25:59,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 2020. [2022-07-11 22:25:59,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 1498 states have (on average 1.4425901201602136) internal successors, (2161), 1499 states have internal predecessors, (2161), 503 states have call successors, (503), 18 states have call predecessors, (503), 18 states have return successors, (503), 502 states have call predecessors, (503), 503 states have call successors, (503) [2022-07-11 22:25:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3167 transitions. [2022-07-11 22:25:59,924 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3167 transitions. Word has length 103 [2022-07-11 22:25:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:25:59,924 INFO L495 AbstractCegarLoop]: Abstraction has 2020 states and 3167 transitions. [2022-07-11 22:25:59,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-11 22:25:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3167 transitions. [2022-07-11 22:25:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-11 22:25:59,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:25:59,927 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:25:59,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:00,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-11 22:26:00,144 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:00,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash 2058870425, now seen corresponding path program 10 times [2022-07-11 22:26:00,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:00,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359424038] [2022-07-11 22:26:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:00,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:00,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-11 22:26:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:00,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-11 22:26:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:00,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-11 22:26:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:00,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-11 22:26:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:00,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-11 22:26:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:00,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-11 22:26:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:00,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-11 22:26:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:00,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-11 22:26:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:00,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-11 22:26:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:26:00,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359424038] [2022-07-11 22:26:00,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359424038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338197823] [2022-07-11 22:26:00,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:26:00,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:00,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:00,296 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:26:00,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-11 22:26:00,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:26:00,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:00,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-11 22:26:00,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:00,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:26:00,658 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:26:00,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-11 22:26:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:26:00,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:00,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:26:00,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:26:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-11 22:26:00,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338197823] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:00,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:00,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2022-07-11 22:26:00,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911684169] [2022-07-11 22:26:00,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:00,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 22:26:00,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:00,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 22:26:00,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:26:00,801 INFO L87 Difference]: Start difference. First operand 2020 states and 3167 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)