./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-industry-pattern/array_shadowinit.i -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 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 20:58:16,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 20:58:16,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 20:58:17,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 20:58:17,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 20:58:17,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 20:58:17,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 20:58:17,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 20:58:17,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 20:58:17,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 20:58:17,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 20:58:17,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 20:58:17,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 20:58:17,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 20:58:17,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 20:58:17,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 20:58:17,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 20:58:17,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 20:58:17,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 20:58:17,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 20:58:17,088 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 20:58:17,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 20:58:17,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 20:58:17,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 20:58:17,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 20:58:17,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 20:58:17,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 20:58:17,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 20:58:17,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 20:58:17,103 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 20:58:17,104 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 20:58:17,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 20:58:17,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 20:58:17,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 20:58:17,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 20:58:17,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 20:58:17,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 20:58:17,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 20:58:17,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 20:58:17,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 20:58:17,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 20:58:17,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 20:58:17,114 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 20:58:17,147 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 20:58:17,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 20:58:17,148 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 20:58:17,148 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 20:58:17,149 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 20:58:17,149 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 20:58:17,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 20:58:17,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 20:58:17,150 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 20:58:17,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 20:58:17,151 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 20:58:17,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 20:58:17,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 20:58:17,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 20:58:17,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 20:58:17,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 20:58:17,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 20:58:17,152 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 20:58:17,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 20:58:17,153 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 20:58:17,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 20:58:17,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 20:58:17,153 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 20:58:17,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 20:58:17,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:58:17,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 20:58:17,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 20:58:17,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 20:58:17,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 20:58:17,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 20:58:17,155 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 20:58:17,155 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 20:58:17,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 20:58:17,156 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 [2022-07-20 20:58:17,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 20:58:17,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 20:58:17,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 20:58:17,466 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 20:58:17,466 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 20:58:17,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2022-07-20 20:58:17,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f938b50/5062e4f013594435a8e9b7176f29e294/FLAGe42ccfff4 [2022-07-20 20:58:18,061 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 20:58:18,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2022-07-20 20:58:18,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f938b50/5062e4f013594435a8e9b7176f29e294/FLAGe42ccfff4 [2022-07-20 20:58:18,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7f938b50/5062e4f013594435a8e9b7176f29e294 [2022-07-20 20:58:18,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 20:58:18,504 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 20:58:18,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 20:58:18,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 20:58:18,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 20:58:18,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f7a72f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18, skipping insertion in model container [2022-07-20 20:58:18,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 20:58:18,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 20:58:18,755 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-industry-pattern/array_shadowinit.i[809,822] [2022-07-20 20:58:18,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:58:18,782 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 20:58:18,796 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-industry-pattern/array_shadowinit.i[809,822] [2022-07-20 20:58:18,806 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:58:18,821 INFO L208 MainTranslator]: Completed translation [2022-07-20 20:58:18,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18 WrapperNode [2022-07-20 20:58:18,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 20:58:18,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 20:58:18,824 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 20:58:18,824 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 20:58:18,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,854 INFO L137 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2022-07-20 20:58:18,855 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 20:58:18,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 20:58:18,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 20:58:18,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 20:58:18,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,902 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 20:58:18,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 20:58:18,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 20:58:18,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 20:58:18,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (1/1) ... [2022-07-20 20:58:18,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:58:18,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:18,941 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) [2022-07-20 20:58:18,967 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 [2022-07-20 20:58:18,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 20:58:18,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 20:58:18,987 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 20:58:18,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 20:58:18,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 20:58:18,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 20:58:18,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 20:58:18,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 20:58:19,050 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 20:58:19,052 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 20:58:19,205 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 20:58:19,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 20:58:19,216 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 20:58:19,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:58:19 BoogieIcfgContainer [2022-07-20 20:58:19,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 20:58:19,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 20:58:19,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 20:58:19,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 20:58:19,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 08:58:18" (1/3) ... [2022-07-20 20:58:19,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519abc9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:58:19, skipping insertion in model container [2022-07-20 20:58:19,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:58:18" (2/3) ... [2022-07-20 20:58:19,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519abc9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:58:19, skipping insertion in model container [2022-07-20 20:58:19,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:58:19" (3/3) ... [2022-07-20 20:58:19,239 INFO L111 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2022-07-20 20:58:19,269 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 20:58:19,269 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 20:58:19,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 20:58:19,351 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@666c1fc2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@75bc4eb6 [2022-07-20 20:58:19,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 20:58:19,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:19,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 20:58:19,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:19,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:19,373 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:19,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:19,379 INFO L85 PathProgramCache]: Analyzing trace with hash 126038137, now seen corresponding path program 1 times [2022-07-20 20:58:19,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:19,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523402524] [2022-07-20 20:58:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:19,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:19,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:19,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523402524] [2022-07-20 20:58:19,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523402524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:58:19,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:58:19,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 20:58:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635797933] [2022-07-20 20:58:19,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:58:19,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 20:58:19,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:19,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 20:58:19,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 20:58:19,599 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:19,614 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-07-20 20:58:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 20:58:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 20:58:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:19,625 INFO L225 Difference]: With dead ends: 26 [2022-07-20 20:58:19,625 INFO L226 Difference]: Without dead ends: 10 [2022-07-20 20:58:19,628 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 [2022-07-20 20:58:19,633 INFO L413 NwaCegarLoop]: 17 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, 17 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 [2022-07-20 20:58:19,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:58:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-20 20:58:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-07-20 20:58:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-07-20 20:58:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-20 20:58:19,668 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-07-20 20:58:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:19,669 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-20 20:58:19,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-20 20:58:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 20:58:19,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:19,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:19,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 20:58:19,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:19,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:19,672 INFO L85 PathProgramCache]: Analyzing trace with hash 122344053, now seen corresponding path program 1 times [2022-07-20 20:58:19,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:19,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671131266] [2022-07-20 20:58:19,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:19,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:19,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:19,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671131266] [2022-07-20 20:58:19,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671131266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:58:19,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:58:19,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:58:19,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499231360] [2022-07-20 20:58:19,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:58:19,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:58:19,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:58:19,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:58:19,792 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:19,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:19,824 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-07-20 20:58:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:58:19,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 20:58:19,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:19,826 INFO L225 Difference]: With dead ends: 17 [2022-07-20 20:58:19,826 INFO L226 Difference]: Without dead ends: 11 [2022-07-20 20:58:19,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:58:19,832 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:19,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:58:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-20 20:58:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-20 20:58:19,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:19,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-07-20 20:58:19,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2022-07-20 20:58:19,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:19,843 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-07-20 20:58:19,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:19,846 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-07-20 20:58:19,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 20:58:19,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:19,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:19,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 20:58:19,848 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:19,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash -450855509, now seen corresponding path program 1 times [2022-07-20 20:58:19,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:19,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276042690] [2022-07-20 20:58:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:19,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:19,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:19,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276042690] [2022-07-20 20:58:19,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276042690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:19,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491310021] [2022-07-20 20:58:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:19,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:19,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:19,987 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) [2022-07-20 20:58:20,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 20:58:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:20,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 20:58:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:20,144 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 11 treesize of output 7 [2022-07-20 20:58:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:20,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:20,261 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 14 treesize of output 12 [2022-07-20 20:58:20,267 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 26 treesize of output 24 [2022-07-20 20:58:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:20,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491310021] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:20,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:20,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-20 20:58:20,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022815838] [2022-07-20 20:58:20,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:20,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 20:58:20,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 20:58:20,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-20 20:58:20,292 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:20,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:20,380 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2022-07-20 20:58:20,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 20:58:20,381 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-20 20:58:20,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:20,381 INFO L225 Difference]: With dead ends: 17 [2022-07-20 20:58:20,381 INFO L226 Difference]: Without dead ends: 15 [2022-07-20 20:58:20,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-20 20:58:20,383 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:20,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:58:20,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-20 20:58:20,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2022-07-20 20:58:20,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:20,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-07-20 20:58:20,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2022-07-20 20:58:20,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:20,389 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-07-20 20:58:20,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:20,389 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-07-20 20:58:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 20:58:20,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:20,390 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:20,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:20,607 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 [2022-07-20 20:58:20,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:20,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1068940558, now seen corresponding path program 1 times [2022-07-20 20:58:20,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:20,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490805478] [2022-07-20 20:58:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:20,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:20,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:20,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:20,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490805478] [2022-07-20 20:58:20,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490805478] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:20,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159730102] [2022-07-20 20:58:20,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:20,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:20,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:20,693 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) [2022-07-20 20:58:20,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 20:58:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:20,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 20:58:20,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:20,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:20,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159730102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:20,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:20,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-20 20:58:20,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477371723] [2022-07-20 20:58:20,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:20,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 20:58:20,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:20,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 20:58:20,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-20 20:58:20,892 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:20,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:20,988 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-07-20 20:58:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 20:58:20,992 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 20:58:20,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:20,994 INFO L225 Difference]: With dead ends: 30 [2022-07-20 20:58:20,997 INFO L226 Difference]: Without dead ends: 20 [2022-07-20 20:58:20,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-20 20:58:21,004 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:21,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:58:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-20 20:58:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2022-07-20 20:58:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-07-20 20:58:21,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2022-07-20 20:58:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:21,018 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-07-20 20:58:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,019 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-07-20 20:58:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 20:58:21,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:21,020 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:21,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:21,247 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 [2022-07-20 20:58:21,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:21,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash 407528232, now seen corresponding path program 2 times [2022-07-20 20:58:21,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:21,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760370869] [2022-07-20 20:58:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:21,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:21,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760370869] [2022-07-20 20:58:21,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760370869] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174089113] [2022-07-20 20:58:21,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:58:21,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:21,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:21,390 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) [2022-07-20 20:58:21,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 20:58:21,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:58:21,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:21,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 20:58:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:21,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:58:21,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-07-20 20:58:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:21,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:21,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:21,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:21,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:21,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:21,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174089113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:21,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:21,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-07-20 20:58:21,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634434073] [2022-07-20 20:58:21,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:21,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 20:58:21,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 20:58:21,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-20 20:58:21,814 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:21,934 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-07-20 20:58:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 20:58:21,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 20:58:21,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:21,937 INFO L225 Difference]: With dead ends: 21 [2022-07-20 20:58:21,937 INFO L226 Difference]: Without dead ends: 19 [2022-07-20 20:58:21,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-07-20 20:58:21,940 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:21,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-20 20:58:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-07-20 20:58:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-07-20 20:58:21,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-07-20 20:58:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:21,954 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-07-20 20:58:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-07-20 20:58:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 20:58:21,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:21,956 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:21,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-20 20:58:22,159 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 [2022-07-20 20:58:22,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:22,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:22,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1194192811, now seen corresponding path program 3 times [2022-07-20 20:58:22,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:22,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209076158] [2022-07-20 20:58:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:22,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:22,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:22,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:22,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209076158] [2022-07-20 20:58:22,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209076158] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:22,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914235255] [2022-07-20 20:58:22,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:58:22,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:22,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:22,246 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) [2022-07-20 20:58:22,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 20:58:22,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 20:58:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 20:58:22,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:22,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:22,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914235255] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:22,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:22,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-20 20:58:22,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653670542] [2022-07-20 20:58:22,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:22,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 20:58:22,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:22,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 20:58:22,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-20 20:58:22,437 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:22,521 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-07-20 20:58:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 20:58:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 20:58:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:22,524 INFO L225 Difference]: With dead ends: 37 [2022-07-20 20:58:22,524 INFO L226 Difference]: Without dead ends: 24 [2022-07-20 20:58:22,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-20 20:58:22,526 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:22,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:58:22,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-20 20:58:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-07-20 20:58:22,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-20 20:58:22,534 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2022-07-20 20:58:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:22,534 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-20 20:58:22,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-20 20:58:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 20:58:22,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:22,538 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:22,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:22,751 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 [2022-07-20 20:58:22,752 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:22,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash -298048117, now seen corresponding path program 4 times [2022-07-20 20:58:22,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:22,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74570943] [2022-07-20 20:58:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:22,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:22,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:22,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74570943] [2022-07-20 20:58:22,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74570943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:22,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821651552] [2022-07-20 20:58:22,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:58:22,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:22,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:22,904 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) [2022-07-20 20:58:22,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 20:58:22,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:58:22,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:22,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 20:58:22,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:22,976 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:58:23,059 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 44 treesize of output 20 [2022-07-20 20:58:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:23,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:23,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:23,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:23,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821651552] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:23,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:23,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2022-07-20 20:58:23,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007876642] [2022-07-20 20:58:23,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:23,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 20:58:23,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:23,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 20:58:23,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-20 20:58:23,166 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:23,332 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2022-07-20 20:58:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 20:58:23,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-20 20:58:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:23,335 INFO L225 Difference]: With dead ends: 25 [2022-07-20 20:58:23,335 INFO L226 Difference]: Without dead ends: 23 [2022-07-20 20:58:23,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-07-20 20:58:23,336 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:23,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-20 20:58:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-07-20 20:58:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-07-20 20:58:23,347 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2022-07-20 20:58:23,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:23,348 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-07-20 20:58:23,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-07-20 20:58:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 20:58:23,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:23,348 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:23,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:23,571 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 [2022-07-20 20:58:23,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:23,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1449259246, now seen corresponding path program 5 times [2022-07-20 20:58:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:23,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266695902] [2022-07-20 20:58:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:23,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:23,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:23,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266695902] [2022-07-20 20:58:23,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266695902] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:23,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747880262] [2022-07-20 20:58:23,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:58:23,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:23,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:23,703 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) [2022-07-20 20:58:23,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 20:58:23,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 20:58:23,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:23,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 20:58:23,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:23,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:23,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747880262] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:23,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:23,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-20 20:58:23,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942654812] [2022-07-20 20:58:23,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:23,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 20:58:23,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:23,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 20:58:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-20 20:58:23,928 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:24,016 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-07-20 20:58:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 20:58:24,017 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 20:58:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:24,018 INFO L225 Difference]: With dead ends: 44 [2022-07-20 20:58:24,018 INFO L226 Difference]: Without dead ends: 28 [2022-07-20 20:58:24,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-20 20:58:24,019 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:24,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:58:24,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-20 20:58:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2022-07-20 20:58:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-07-20 20:58:24,024 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2022-07-20 20:58:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:24,025 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-07-20 20:58:24,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-07-20 20:58:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-20 20:58:24,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:24,026 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:24,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:24,247 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 [2022-07-20 20:58:24,248 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:24,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:24,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1156487496, now seen corresponding path program 6 times [2022-07-20 20:58:24,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:24,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171146023] [2022-07-20 20:58:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:24,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:24,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171146023] [2022-07-20 20:58:24,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171146023] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419259364] [2022-07-20 20:58:24,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:58:24,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:24,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:24,465 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) [2022-07-20 20:58:24,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 20:58:24,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-20 20:58:24,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:24,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 20:58:24,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:24,602 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 [2022-07-20 20:58:24,807 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-20 20:58:24,808 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 42 treesize of output 23 [2022-07-20 20:58:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:24,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:25,728 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 [2022-07-20 20:58:25,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 20:58:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:25,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419259364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:25,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:25,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2022-07-20 20:58:25,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603077941] [2022-07-20 20:58:25,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:25,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 20:58:25,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:25,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 20:58:25,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=921, Unknown=1, NotChecked=0, Total=1056 [2022-07-20 20:58:25,919 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:26,569 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-07-20 20:58:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 20:58:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-20 20:58:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:26,571 INFO L225 Difference]: With dead ends: 44 [2022-07-20 20:58:26,571 INFO L226 Difference]: Without dead ends: 28 [2022-07-20 20:58:26,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=379, Invalid=2376, Unknown=1, NotChecked=0, Total=2756 [2022-07-20 20:58:26,573 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:26,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 92 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 224 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-07-20 20:58:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-20 20:58:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-07-20 20:58:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-07-20 20:58:26,578 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2022-07-20 20:58:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:26,578 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-07-20 20:58:26,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-07-20 20:58:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 20:58:26,579 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:26,579 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:26,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:26,799 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 [2022-07-20 20:58:26,799 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:26,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1052957333, now seen corresponding path program 7 times [2022-07-20 20:58:26,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:26,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030012642] [2022-07-20 20:58:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:26,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:26,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:26,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030012642] [2022-07-20 20:58:26,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030012642] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:26,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268060442] [2022-07-20 20:58:26,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 20:58:26,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:26,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:26,993 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) [2022-07-20 20:58:26,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 20:58:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:27,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 20:58:27,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:27,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:58:27,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-07-20 20:58:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:27,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:27,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:27,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:27,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:27,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:27,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268060442] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:27,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:27,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2022-07-20 20:58:27,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783632792] [2022-07-20 20:58:27,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:27,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 20:58:27,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:27,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 20:58:27,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-07-20 20:58:27,446 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:27,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:27,717 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2022-07-20 20:58:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-20 20:58:27,718 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 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 25 [2022-07-20 20:58:27,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:27,718 INFO L225 Difference]: With dead ends: 33 [2022-07-20 20:58:27,718 INFO L226 Difference]: Without dead ends: 31 [2022-07-20 20:58:27,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-07-20 20:58:27,719 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:27,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 98 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:58:27,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-20 20:58:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2022-07-20 20:58:27,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-07-20 20:58:27,724 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2022-07-20 20:58:27,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:27,725 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-07-20 20:58:27,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:27,725 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-07-20 20:58:27,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 20:58:27,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:27,726 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:27,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:27,926 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 [2022-07-20 20:58:27,927 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:27,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:27,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1794016050, now seen corresponding path program 8 times [2022-07-20 20:58:27,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:27,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670646874] [2022-07-20 20:58:27,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:27,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:28,086 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:28,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:28,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670646874] [2022-07-20 20:58:28,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670646874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:28,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890045818] [2022-07-20 20:58:28,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:58:28,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:28,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:28,089 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) [2022-07-20 20:58:28,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 20:58:28,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:58:28,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:28,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 20:58:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:28,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:28,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890045818] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:28,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:28,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-20 20:58:28,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907040342] [2022-07-20 20:58:28,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:28,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-20 20:58:28,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:28,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-20 20:58:28,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-20 20:58:28,345 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:28,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:28,459 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-07-20 20:58:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 20:58:28,460 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-20 20:58:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:28,462 INFO L225 Difference]: With dead ends: 58 [2022-07-20 20:58:28,462 INFO L226 Difference]: Without dead ends: 36 [2022-07-20 20:58:28,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-20 20:58:28,464 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:28,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 44 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-20 20:58:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-07-20 20:58:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:28,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-07-20 20:58:28,474 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2022-07-20 20:58:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:28,474 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-07-20 20:58:28,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-07-20 20:58:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 20:58:28,476 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:28,476 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:28,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:28,701 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 [2022-07-20 20:58:28,702 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:28,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:28,702 INFO L85 PathProgramCache]: Analyzing trace with hash -528189592, now seen corresponding path program 9 times [2022-07-20 20:58:28,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:28,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829439126] [2022-07-20 20:58:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:28,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:28,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:28,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829439126] [2022-07-20 20:58:28,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829439126] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:28,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421506723] [2022-07-20 20:58:28,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:58:28,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:28,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:28,939 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) [2022-07-20 20:58:28,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 20:58:29,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 20:58:29,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:29,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 20:58:29,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:29,176 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 [2022-07-20 20:58:29,486 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-20 20:58:29,487 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 42 treesize of output 23 [2022-07-20 20:58:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:29,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:30,345 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 [2022-07-20 20:58:30,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 20:58:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:30,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421506723] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:30,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:30,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 45 [2022-07-20 20:58:30,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263409628] [2022-07-20 20:58:30,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:30,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 20:58:30,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 20:58:30,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1761, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 20:58:30,661 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:31,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:31,775 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-07-20 20:58:31,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-20 20:58:31,775 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 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 29 [2022-07-20 20:58:31,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:31,776 INFO L225 Difference]: With dead ends: 58 [2022-07-20 20:58:31,776 INFO L226 Difference]: Without dead ends: 36 [2022-07-20 20:58:31,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=628, Invalid=4774, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 20:58:31,778 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:31,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 190 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 487 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2022-07-20 20:58:31,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-20 20:58:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-07-20 20:58:31,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-07-20 20:58:31,785 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-07-20 20:58:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:31,786 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-07-20 20:58:31,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-07-20 20:58:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 20:58:31,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:31,787 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:31,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:32,015 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 [2022-07-20 20:58:32,016 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1812036939, now seen corresponding path program 10 times [2022-07-20 20:58:32,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:32,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8127364] [2022-07-20 20:58:32,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:32,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:32,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:32,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8127364] [2022-07-20 20:58:32,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8127364] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:32,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001304452] [2022-07-20 20:58:32,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:58:32,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:32,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:32,292 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) [2022-07-20 20:58:32,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 20:58:32,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:58:32,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:32,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 20:58:32,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:32,399 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:58:32,634 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 47 treesize of output 23 [2022-07-20 20:58:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:32,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:32,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:32,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:32,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:32,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:32,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001304452] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:32,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:32,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2022-07-20 20:58:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310989809] [2022-07-20 20:58:32,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:32,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 20:58:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 20:58:32,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-07-20 20:58:32,836 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:33,239 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2022-07-20 20:58:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 20:58:33,240 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-20 20:58:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:33,240 INFO L225 Difference]: With dead ends: 41 [2022-07-20 20:58:33,240 INFO L226 Difference]: Without dead ends: 39 [2022-07-20 20:58:33,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 20:58:33,241 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:33,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 175 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:58:33,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-20 20:58:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2022-07-20 20:58:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-07-20 20:58:33,248 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2022-07-20 20:58:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:33,248 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-07-20 20:58:33,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-07-20 20:58:33,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 20:58:33,249 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:33,250 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:33,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:33,450 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 [2022-07-20 20:58:33,450 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1046700206, now seen corresponding path program 11 times [2022-07-20 20:58:33,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:33,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712313715] [2022-07-20 20:58:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:33,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:33,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712313715] [2022-07-20 20:58:33,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712313715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:33,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318262597] [2022-07-20 20:58:33,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:58:33,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:33,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:33,612 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) [2022-07-20 20:58:33,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 20:58:33,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 20:58:33,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:33,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 20:58:33,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:33,918 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:33,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:33,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318262597] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:33,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:33,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-20 20:58:33,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079189509] [2022-07-20 20:58:33,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:33,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 20:58:33,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:33,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 20:58:33,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-20 20:58:33,981 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:34,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:34,159 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-07-20 20:58:34,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 20:58:34,159 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 20:58:34,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:34,160 INFO L225 Difference]: With dead ends: 72 [2022-07-20 20:58:34,160 INFO L226 Difference]: Without dead ends: 44 [2022-07-20 20:58:34,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 20:58:34,161 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:34,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 67 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:34,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-20 20:58:34,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2022-07-20 20:58:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-07-20 20:58:34,169 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2022-07-20 20:58:34,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:34,169 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-07-20 20:58:34,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-07-20 20:58:34,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-20 20:58:34,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:34,170 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:34,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:34,383 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 [2022-07-20 20:58:34,383 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1382940040, now seen corresponding path program 12 times [2022-07-20 20:58:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:34,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912797869] [2022-07-20 20:58:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:34,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:34,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:34,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912797869] [2022-07-20 20:58:34,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912797869] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:34,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651663388] [2022-07-20 20:58:34,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:58:34,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:34,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:34,661 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) [2022-07-20 20:58:34,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 20:58:34,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-20 20:58:34,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:34,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-20 20:58:34,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:34,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:58:35,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-07-20 20:58:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:35,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:35,327 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 16 treesize of output 14 [2022-07-20 20:58:35,329 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 32 treesize of output 28 [2022-07-20 20:58:35,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:35,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:35,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651663388] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:35,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:35,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 29 [2022-07-20 20:58:35,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696365650] [2022-07-20 20:58:35,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:35,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 20:58:35,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:35,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 20:58:35,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2022-07-20 20:58:35,379 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:35,862 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2022-07-20 20:58:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 20:58:35,863 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-20 20:58:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:35,864 INFO L225 Difference]: With dead ends: 45 [2022-07-20 20:58:35,864 INFO L226 Difference]: Without dead ends: 43 [2022-07-20 20:58:35,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 20:58:35,868 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:35,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 228 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 20:58:35,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-20 20:58:35,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-07-20 20:58:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-07-20 20:58:35,882 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2022-07-20 20:58:35,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:35,882 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-07-20 20:58:35,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:35,883 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-07-20 20:58:35,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 20:58:35,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:35,884 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:35,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:36,107 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 [2022-07-20 20:58:36,108 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:36,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1845221877, now seen corresponding path program 13 times [2022-07-20 20:58:36,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:36,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784581691] [2022-07-20 20:58:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:36,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:36,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:36,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:36,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784581691] [2022-07-20 20:58:36,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784581691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:36,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461276596] [2022-07-20 20:58:36,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 20:58:36,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:36,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:36,309 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) [2022-07-20 20:58:36,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 20:58:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:36,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 20:58:36,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:36,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:36,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461276596] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:36,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:36,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-20 20:58:36,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518216318] [2022-07-20 20:58:36,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:36,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 20:58:36,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:36,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 20:58:36,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-20 20:58:36,691 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:36,862 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-07-20 20:58:36,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 20:58:36,863 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-20 20:58:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:36,863 INFO L225 Difference]: With dead ends: 79 [2022-07-20 20:58:36,863 INFO L226 Difference]: Without dead ends: 48 [2022-07-20 20:58:36,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 20:58:36,865 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 98 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:36,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 69 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:36,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-20 20:58:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-07-20 20:58:36,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:36,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-07-20 20:58:36,874 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2022-07-20 20:58:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:36,874 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-07-20 20:58:36,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-07-20 20:58:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 20:58:36,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:36,875 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:36,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:37,075 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 [2022-07-20 20:58:37,075 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1575431467, now seen corresponding path program 14 times [2022-07-20 20:58:37,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:37,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826894785] [2022-07-20 20:58:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:37,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:37,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:37,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826894785] [2022-07-20 20:58:37,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826894785] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:37,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240319192] [2022-07-20 20:58:37,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:58:37,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:37,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:37,432 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) [2022-07-20 20:58:37,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 20:58:37,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:58:37,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:37,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-20 20:58:37,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:37,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:58:37,916 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 47 treesize of output 23 [2022-07-20 20:58:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:37,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:38,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:38,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:38,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:38,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:38,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240319192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:38,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:38,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 32 [2022-07-20 20:58:38,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686852718] [2022-07-20 20:58:38,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:38,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-20 20:58:38,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:38,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-20 20:58:38,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=912, Unknown=0, NotChecked=0, Total=992 [2022-07-20 20:58:38,158 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:38,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:38,702 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-07-20 20:58:38,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 20:58:38,702 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-20 20:58:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:38,703 INFO L225 Difference]: With dead ends: 49 [2022-07-20 20:58:38,703 INFO L226 Difference]: Without dead ends: 47 [2022-07-20 20:58:38,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1729, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 20:58:38,704 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:38,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 257 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 20:58:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-20 20:58:38,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-07-20 20:58:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-20 20:58:38,711 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2022-07-20 20:58:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:38,711 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-20 20:58:38,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.1875) internal successors, (70), 32 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-20 20:58:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 20:58:38,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:38,712 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:38,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:38,915 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 [2022-07-20 20:58:38,916 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:38,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1718983822, now seen corresponding path program 15 times [2022-07-20 20:58:38,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:38,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000702636] [2022-07-20 20:58:38,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:38,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:39,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:39,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000702636] [2022-07-20 20:58:39,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000702636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:39,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179569754] [2022-07-20 20:58:39,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:58:39,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:39,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:39,104 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) [2022-07-20 20:58:39,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 20:58:39,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-20 20:58:39,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:39,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 20:58:39,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:39,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:39,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179569754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:39,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:39,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2022-07-20 20:58:39,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94969655] [2022-07-20 20:58:39,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:39,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 20:58:39,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 20:58:39,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 20:58:39,759 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:39,936 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2022-07-20 20:58:39,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 20:58:39,936 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-20 20:58:39,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:39,937 INFO L225 Difference]: With dead ends: 86 [2022-07-20 20:58:39,937 INFO L226 Difference]: Without dead ends: 52 [2022-07-20 20:58:39,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 20:58:39,938 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 112 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:39,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 85 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-20 20:58:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-07-20 20:58:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-07-20 20:58:39,950 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2022-07-20 20:58:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:39,951 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-07-20 20:58:39,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-07-20 20:58:39,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 20:58:39,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:39,952 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:39,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:40,152 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 [2022-07-20 20:58:40,152 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:40,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:40,153 INFO L85 PathProgramCache]: Analyzing trace with hash 814558120, now seen corresponding path program 16 times [2022-07-20 20:58:40,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:40,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737427751] [2022-07-20 20:58:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:40,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:40,541 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:40,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:40,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737427751] [2022-07-20 20:58:40,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737427751] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:40,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769962449] [2022-07-20 20:58:40,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:58:40,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:40,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:40,543 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) [2022-07-20 20:58:40,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 20:58:40,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:58:40,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:40,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-20 20:58:40,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:40,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:58:41,025 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 47 treesize of output 23 [2022-07-20 20:58:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:41,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:41,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:41,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:41,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:41,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:41,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769962449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:41,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:41,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 35 [2022-07-20 20:58:41,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406265788] [2022-07-20 20:58:41,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:41,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 20:58:41,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:41,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 20:58:41,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2022-07-20 20:58:41,263 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:41,887 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2022-07-20 20:58:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 20:58:41,888 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-20 20:58:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:41,888 INFO L225 Difference]: With dead ends: 53 [2022-07-20 20:58:41,888 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 20:58:41,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=2078, Unknown=0, NotChecked=0, Total=2256 [2022-07-20 20:58:41,890 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:41,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 293 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 20:58:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 20:58:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-07-20 20:58:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:41,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-07-20 20:58:41,898 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2022-07-20 20:58:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:41,899 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-07-20 20:58:41,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-07-20 20:58:41,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 20:58:41,900 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:41,900 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:41,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:42,107 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 [2022-07-20 20:58:42,108 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:42,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:42,108 INFO L85 PathProgramCache]: Analyzing trace with hash -59476011, now seen corresponding path program 17 times [2022-07-20 20:58:42,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:42,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853737843] [2022-07-20 20:58:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:42,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:42,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853737843] [2022-07-20 20:58:42,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853737843] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781733738] [2022-07-20 20:58:42,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:58:42,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:42,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:42,357 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) [2022-07-20 20:58:42,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 20:58:42,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-20 20:58:42,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:42,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 20:58:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:42,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:42,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781733738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:42,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:42,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2022-07-20 20:58:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585990745] [2022-07-20 20:58:42,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:42,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 20:58:42,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 20:58:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 20:58:42,842 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:43,029 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-07-20 20:58:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 20:58:43,030 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-20 20:58:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:43,030 INFO L225 Difference]: With dead ends: 93 [2022-07-20 20:58:43,030 INFO L226 Difference]: Without dead ends: 56 [2022-07-20 20:58:43,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 20:58:43,032 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 134 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:43,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 93 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-20 20:58:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2022-07-20 20:58:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:43,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-07-20 20:58:43,041 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2022-07-20 20:58:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:43,041 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-07-20 20:58:43,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:43,041 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-07-20 20:58:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 20:58:43,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:43,042 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:43,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-20 20:58:43,242 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 [2022-07-20 20:58:43,242 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:43,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1204565259, now seen corresponding path program 18 times [2022-07-20 20:58:43,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:43,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175157361] [2022-07-20 20:58:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:43,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:43,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:43,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175157361] [2022-07-20 20:58:43,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175157361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:43,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516512064] [2022-07-20 20:58:43,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:58:43,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:43,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:43,665 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) [2022-07-20 20:58:43,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 20:58:43,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-20 20:58:43,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:43,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 20:58:43,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:43,952 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:58:44,361 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 47 treesize of output 23 [2022-07-20 20:58:44,398 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:44,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:44,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:44,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:44,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:44,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:44,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516512064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:44,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:44,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2022-07-20 20:58:44,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097768216] [2022-07-20 20:58:44,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:44,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 20:58:44,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:44,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 20:58:44,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1310, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 20:58:44,647 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:45,384 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2022-07-20 20:58:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-20 20:58:45,385 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-20 20:58:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:45,386 INFO L225 Difference]: With dead ends: 57 [2022-07-20 20:58:45,386 INFO L226 Difference]: Without dead ends: 55 [2022-07-20 20:58:45,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=2459, Unknown=0, NotChecked=0, Total=2652 [2022-07-20 20:58:45,388 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:45,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 371 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 20:58:45,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-20 20:58:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-07-20 20:58:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-07-20 20:58:45,409 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2022-07-20 20:58:45,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:45,409 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-07-20 20:58:45,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-07-20 20:58:45,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 20:58:45,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:45,410 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:45,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:45,627 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 [2022-07-20 20:58:45,627 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:45,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash 756666258, now seen corresponding path program 19 times [2022-07-20 20:58:45,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:45,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473875524] [2022-07-20 20:58:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:45,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:45,891 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:45,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:45,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473875524] [2022-07-20 20:58:45,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473875524] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:45,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651190152] [2022-07-20 20:58:45,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 20:58:45,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:45,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:45,893 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) [2022-07-20 20:58:45,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 20:58:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:45,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 20:58:45,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:46,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:46,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651190152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:46,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:46,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2022-07-20 20:58:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198098881] [2022-07-20 20:58:46,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:46,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 20:58:46,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 20:58:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 20:58:46,343 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:46,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:46,581 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2022-07-20 20:58:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 20:58:46,583 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-20 20:58:46,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:46,584 INFO L225 Difference]: With dead ends: 100 [2022-07-20 20:58:46,584 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 20:58:46,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:58:46,585 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 116 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:46,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 111 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:46,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 20:58:46,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-07-20 20:58:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-07-20 20:58:46,593 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2022-07-20 20:58:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:46,593 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-07-20 20:58:46,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:46,594 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-07-20 20:58:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 20:58:46,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:46,594 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:46,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:46,795 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 [2022-07-20 20:58:46,795 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:46,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1598292424, now seen corresponding path program 20 times [2022-07-20 20:58:46,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:46,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788717146] [2022-07-20 20:58:46,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:46,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:47,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:47,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788717146] [2022-07-20 20:58:47,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788717146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:47,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446935449] [2022-07-20 20:58:47,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:58:47,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:47,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:47,290 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) [2022-07-20 20:58:47,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 20:58:47,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:58:47,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:47,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-20 20:58:47,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:47,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:58:47,855 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 47 treesize of output 23 [2022-07-20 20:58:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:47,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:48,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:48,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:48,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:48,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:48,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446935449] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:48,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:48,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 41 [2022-07-20 20:58:48,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497742656] [2022-07-20 20:58:48,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:48,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 20:58:48,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:48,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 20:58:48,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1536, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 20:58:48,143 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:48,872 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2022-07-20 20:58:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 20:58:48,872 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-20 20:58:48,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:48,873 INFO L225 Difference]: With dead ends: 61 [2022-07-20 20:58:48,873 INFO L226 Difference]: Without dead ends: 59 [2022-07-20 20:58:48,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=208, Invalid=2872, Unknown=0, NotChecked=0, Total=3080 [2022-07-20 20:58:48,874 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:48,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 446 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 20:58:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-20 20:58:48,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-07-20 20:58:48,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-20 20:58:48,885 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2022-07-20 20:58:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:48,885 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-20 20:58:48,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:48,885 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-20 20:58:48,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 20:58:48,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:48,886 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:48,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:49,107 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 [2022-07-20 20:58:49,107 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash 726953397, now seen corresponding path program 21 times [2022-07-20 20:58:49,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:49,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300013202] [2022-07-20 20:58:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:49,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:49,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:49,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:49,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300013202] [2022-07-20 20:58:49,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300013202] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:49,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132858491] [2022-07-20 20:58:49,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:58:49,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:49,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:49,416 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) [2022-07-20 20:58:49,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 20:58:49,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-20 20:58:49,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:49,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-20 20:58:49,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:50,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:50,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132858491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:50,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:50,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2022-07-20 20:58:50,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255977102] [2022-07-20 20:58:50,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:50,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-20 20:58:50,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:50,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-20 20:58:50,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 20:58:50,176 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:50,409 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2022-07-20 20:58:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-20 20:58:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-20 20:58:50,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:50,410 INFO L225 Difference]: With dead ends: 107 [2022-07-20 20:58:50,410 INFO L226 Difference]: Without dead ends: 64 [2022-07-20 20:58:50,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2022-07-20 20:58:50,412 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 138 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:50,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 112 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:58:50,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-20 20:58:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-07-20 20:58:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-07-20 20:58:50,423 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2022-07-20 20:58:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:50,423 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-07-20 20:58:50,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-07-20 20:58:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-20 20:58:50,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:50,424 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:50,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:50,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:50,645 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:50,645 INFO L85 PathProgramCache]: Analyzing trace with hash -66153237, now seen corresponding path program 22 times [2022-07-20 20:58:50,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:50,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686232638] [2022-07-20 20:58:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:50,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:51,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:51,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686232638] [2022-07-20 20:58:51,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686232638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:51,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577168789] [2022-07-20 20:58:51,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:58:51,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:51,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:51,448 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:58:51,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 20:58:51,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:58:51,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:51,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-20 20:58:51,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:51,860 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 [2022-07-20 20:58:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:52,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:52,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:52,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:53,025 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:53,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577168789] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:53,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:53,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 71 [2022-07-20 20:58:53,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698657569] [2022-07-20 20:58:53,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:53,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-20 20:58:53,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:53,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-20 20:58:53,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=4738, Unknown=0, NotChecked=0, Total=4970 [2022-07-20 20:58:53,028 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 71 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:54,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:54,440 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2022-07-20 20:58:54,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-20 20:58:54,440 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 71 states have internal predecessors, (149), 0 states have call successors, (0), 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 57 [2022-07-20 20:58:54,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:54,441 INFO L225 Difference]: With dead ends: 65 [2022-07-20 20:58:54,441 INFO L226 Difference]: Without dead ends: 63 [2022-07-20 20:58:54,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=373, Invalid=7109, Unknown=0, NotChecked=0, Total=7482 [2022-07-20 20:58:54,442 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:54,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 710 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2091 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 20:58:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-20 20:58:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2022-07-20 20:58:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-07-20 20:58:54,455 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2022-07-20 20:58:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:54,455 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-07-20 20:58:54,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 71 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-07-20 20:58:54,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 20:58:54,456 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:54,456 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:54,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-20 20:58:54,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:54,671 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:54,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:54,672 INFO L85 PathProgramCache]: Analyzing trace with hash 623698866, now seen corresponding path program 23 times [2022-07-20 20:58:54,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:54,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453233762] [2022-07-20 20:58:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:54,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:54,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:55,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:55,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453233762] [2022-07-20 20:58:55,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453233762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:55,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899344126] [2022-07-20 20:58:55,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:58:55,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:55,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:55,010 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:58:55,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 20:58:55,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-20 20:58:55,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:55,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 20:58:55,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:55,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:55,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899344126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:55,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:55,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-07-20 20:58:55,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149013348] [2022-07-20 20:58:55,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:55,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 20:58:55,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:55,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 20:58:55,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 20:58:55,751 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:56,046 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2022-07-20 20:58:56,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-20 20:58:56,047 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-20 20:58:56,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:56,047 INFO L225 Difference]: With dead ends: 114 [2022-07-20 20:58:56,047 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 20:58:56,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2022-07-20 20:58:56,049 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 212 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:56,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 142 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:58:56,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 20:58:56,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-07-20 20:58:56,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-07-20 20:58:56,061 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2022-07-20 20:58:56,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:56,062 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-07-20 20:58:56,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:56,062 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-07-20 20:58:56,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-20 20:58:56,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:56,063 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:56,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:56,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-20 20:58:56,288 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash 829718504, now seen corresponding path program 24 times [2022-07-20 20:58:56,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:56,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018514010] [2022-07-20 20:58:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:56,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:56,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018514010] [2022-07-20 20:58:56,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018514010] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:56,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323969422] [2022-07-20 20:58:56,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:58:56,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:56,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:56,962 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:58:56,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 20:58:57,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-20 20:58:57,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:58:57,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-20 20:58:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:58:57,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:58:57,824 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 47 treesize of output 23 [2022-07-20 20:58:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:57,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:58:58,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:58,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:58,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:58:58,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:58:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:58,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323969422] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:58:58,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:58:58,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 47 [2022-07-20 20:58:58,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484352323] [2022-07-20 20:58:58,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:58:58,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 20:58:58,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:58:58,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 20:58:58,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2042, Unknown=0, NotChecked=0, Total=2162 [2022-07-20 20:58:58,139 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:58:59,121 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2022-07-20 20:58:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-20 20:58:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-20 20:58:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:58:59,122 INFO L225 Difference]: With dead ends: 69 [2022-07-20 20:58:59,122 INFO L226 Difference]: Without dead ends: 67 [2022-07-20 20:58:59,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=238, Invalid=3794, Unknown=0, NotChecked=0, Total=4032 [2022-07-20 20:58:59,123 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 20:58:59,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 579 Invalid, 1842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 20:58:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-20 20:58:59,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-07-20 20:58:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-07-20 20:58:59,134 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2022-07-20 20:58:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:58:59,134 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-07-20 20:58:59,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:58:59,135 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-07-20 20:58:59,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 20:58:59,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:58:59,135 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:58:59,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 20:58:59,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-20 20:58:59,360 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:58:59,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:58:59,360 INFO L85 PathProgramCache]: Analyzing trace with hash 611957653, now seen corresponding path program 25 times [2022-07-20 20:58:59,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:58:59,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731312505] [2022-07-20 20:58:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:58:59,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:58:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:58:59,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:58:59,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731312505] [2022-07-20 20:58:59,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731312505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:58:59,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164525648] [2022-07-20 20:58:59,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 20:58:59,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:58:59,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:58:59,728 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:58:59,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 20:58:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:58:59,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 20:58:59,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:00,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:00,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164525648] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:00,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:00,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-20 20:59:00,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147265169] [2022-07-20 20:59:00,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:00,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 20:59:00,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:00,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 20:59:00,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 20:59:00,451 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:00,723 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2022-07-20 20:59:00,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-20 20:59:00,723 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-20 20:59:00,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:00,724 INFO L225 Difference]: With dead ends: 121 [2022-07-20 20:59:00,724 INFO L226 Difference]: Without dead ends: 72 [2022-07-20 20:59:00,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 20:59:00,725 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 186 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:00,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 132 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:59:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-20 20:59:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2022-07-20 20:59:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-07-20 20:59:00,737 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2022-07-20 20:59:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:00,738 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-07-20 20:59:00,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-07-20 20:59:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-20 20:59:00,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:00,739 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:00,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 20:59:00,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 20:59:00,939 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:00,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1317817547, now seen corresponding path program 26 times [2022-07-20 20:59:00,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:00,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785696645] [2022-07-20 20:59:00,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:00,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:01,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:01,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785696645] [2022-07-20 20:59:01,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785696645] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:01,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522574221] [2022-07-20 20:59:01,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:59:01,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:01,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:01,625 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:01,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 20:59:01,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:59:01,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:01,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-20 20:59:01,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:01,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:59:02,409 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 47 treesize of output 23 [2022-07-20 20:59:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:02,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:02,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:02,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:02,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:02,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:02,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522574221] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:02,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:02,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 50 [2022-07-20 20:59:02,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430842720] [2022-07-20 20:59:02,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:02,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 20:59:02,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 20:59:02,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2322, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 20:59:02,722 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:03,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:03,796 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2022-07-20 20:59:03,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-20 20:59:03,796 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-20 20:59:03,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:03,797 INFO L225 Difference]: With dead ends: 73 [2022-07-20 20:59:03,797 INFO L226 Difference]: Without dead ends: 71 [2022-07-20 20:59:03,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 108 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=253, Invalid=4303, Unknown=0, NotChecked=0, Total=4556 [2022-07-20 20:59:03,798 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:03,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 680 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 20:59:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-20 20:59:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-07-20 20:59:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-07-20 20:59:03,809 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2022-07-20 20:59:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:03,809 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-07-20 20:59:03,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 50 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-07-20 20:59:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-20 20:59:03,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:03,810 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:03,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-20 20:59:04,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 20:59:04,010 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:04,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:04,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1188716590, now seen corresponding path program 27 times [2022-07-20 20:59:04,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:04,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758318090] [2022-07-20 20:59:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:04,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:04,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:04,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758318090] [2022-07-20 20:59:04,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758318090] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:04,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795211383] [2022-07-20 20:59:04,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:59:04,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:04,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:04,433 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:04,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 20:59:04,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-20 20:59:04,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:04,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-20 20:59:04,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:05,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:05,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795211383] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:05,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:05,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-20 20:59:05,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087374844] [2022-07-20 20:59:05,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:05,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 20:59:05,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:05,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 20:59:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:59:05,516 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:05,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:05,788 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2022-07-20 20:59:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 20:59:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-20 20:59:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:05,789 INFO L225 Difference]: With dead ends: 128 [2022-07-20 20:59:05,789 INFO L226 Difference]: Without dead ends: 76 [2022-07-20 20:59:05,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 20:59:05,791 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:05,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 141 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:59:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-20 20:59:05,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2022-07-20 20:59:05,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:05,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-07-20 20:59:05,806 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2022-07-20 20:59:05,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:05,807 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-07-20 20:59:05,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:05,807 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-07-20 20:59:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-20 20:59:05,807 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:05,807 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:05,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-20 20:59:06,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:06,015 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:06,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2004834808, now seen corresponding path program 28 times [2022-07-20 20:59:06,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:06,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355461709] [2022-07-20 20:59:06,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:06,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:06,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:06,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355461709] [2022-07-20 20:59:06,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355461709] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:06,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467863163] [2022-07-20 20:59:06,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:59:06,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:06,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:06,746 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:06,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 20:59:06,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:59:06,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:06,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-20 20:59:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:06,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:59:07,764 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 47 treesize of output 23 [2022-07-20 20:59:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:07,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:08,045 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 16 treesize of output 14 [2022-07-20 20:59:08,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:08,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:08,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:08,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467863163] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:08,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:08,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 53 [2022-07-20 20:59:08,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344198277] [2022-07-20 20:59:08,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:08,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 20:59:08,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 20:59:08,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2620, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:59:08,123 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:09,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:09,327 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2022-07-20 20:59:09,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-20 20:59:09,327 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 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 69 [2022-07-20 20:59:09,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:09,328 INFO L225 Difference]: With dead ends: 77 [2022-07-20 20:59:09,328 INFO L226 Difference]: Without dead ends: 75 [2022-07-20 20:59:09,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=268, Invalid=4844, Unknown=0, NotChecked=0, Total=5112 [2022-07-20 20:59:09,329 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 2221 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 2287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:09,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 756 Invalid, 2287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2221 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 20:59:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-20 20:59:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-07-20 20:59:09,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-07-20 20:59:09,345 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2022-07-20 20:59:09,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:09,345 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-07-20 20:59:09,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2452830188679247) internal successors, (119), 53 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:09,346 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-07-20 20:59:09,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-20 20:59:09,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:09,346 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:09,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 20:59:09,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:09,567 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:09,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:09,568 INFO L85 PathProgramCache]: Analyzing trace with hash -213753483, now seen corresponding path program 29 times [2022-07-20 20:59:09,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:09,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682945652] [2022-07-20 20:59:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:09,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:10,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:10,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682945652] [2022-07-20 20:59:10,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682945652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:10,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710433219] [2022-07-20 20:59:10,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:59:10,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:10,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:10,034 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:10,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 20:59:10,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-07-20 20:59:10,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:10,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 20:59:10,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:10,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:11,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710433219] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:11,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:11,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2022-07-20 20:59:11,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65238981] [2022-07-20 20:59:11,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:11,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-20 20:59:11,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:11,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-20 20:59:11,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2022-07-20 20:59:11,050 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:11,360 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2022-07-20 20:59:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-20 20:59:11,361 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 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 72 [2022-07-20 20:59:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:11,361 INFO L225 Difference]: With dead ends: 135 [2022-07-20 20:59:11,362 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 20:59:11,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2022-07-20 20:59:11,363 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 230 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:11,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 138 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:59:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 20:59:11,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2022-07-20 20:59:11,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-07-20 20:59:11,376 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2022-07-20 20:59:11,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:11,376 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-07-20 20:59:11,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-07-20 20:59:11,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 20:59:11,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:11,377 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:11,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 20:59:11,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-20 20:59:11,580 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:11,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:11,580 INFO L85 PathProgramCache]: Analyzing trace with hash -190620501, now seen corresponding path program 30 times [2022-07-20 20:59:11,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:11,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396179834] [2022-07-20 20:59:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:11,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:12,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:12,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396179834] [2022-07-20 20:59:12,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396179834] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:12,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642687152] [2022-07-20 20:59:12,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:59:12,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:12,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:12,648 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:12,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 20:59:13,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-20 20:59:13,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:13,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-20 20:59:13,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:13,708 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 [2022-07-20 20:59:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:14,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:15,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:15,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:15,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642687152] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:15,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:15,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 91 [2022-07-20 20:59:15,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546171983] [2022-07-20 20:59:15,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:15,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-20 20:59:15,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:15,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-20 20:59:15,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=7938, Unknown=0, NotChecked=0, Total=8190 [2022-07-20 20:59:15,888 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:19,115 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2022-07-20 20:59:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-20 20:59:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 0 states have call successors, (0), 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 73 [2022-07-20 20:59:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:19,116 INFO L225 Difference]: With dead ends: 81 [2022-07-20 20:59:19,116 INFO L226 Difference]: Without dead ends: 79 [2022-07-20 20:59:19,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 82 SyntacticMatches, 11 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=549, Invalid=15201, Unknown=0, NotChecked=0, Total=15750 [2022-07-20 20:59:19,117 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 3700 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 3773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:19,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1199 Invalid, 3773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3700 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 20:59:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-20 20:59:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2022-07-20 20:59:19,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-07-20 20:59:19,128 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2022-07-20 20:59:19,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:19,128 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-07-20 20:59:19,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.120879120879121) internal successors, (193), 91 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-07-20 20:59:19,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 20:59:19,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:19,129 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:19,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-20 20:59:19,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:19,332 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -823786510, now seen corresponding path program 31 times [2022-07-20 20:59:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:19,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439443302] [2022-07-20 20:59:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:19,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:19,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439443302] [2022-07-20 20:59:19,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439443302] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647713719] [2022-07-20 20:59:19,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 20:59:19,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:19,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:19,823 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:19,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 20:59:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:19,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 20:59:19,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:20,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:20,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647713719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:20,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:20,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2022-07-20 20:59:20,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593078435] [2022-07-20 20:59:20,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:20,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-20 20:59:20,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-20 20:59:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2022-07-20 20:59:20,579 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:20,922 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2022-07-20 20:59:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 20:59:20,922 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 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 76 [2022-07-20 20:59:20,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:20,923 INFO L225 Difference]: With dead ends: 142 [2022-07-20 20:59:20,923 INFO L226 Difference]: Without dead ends: 84 [2022-07-20 20:59:20,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2022-07-20 20:59:20,924 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 232 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:20,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 152 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:59:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-20 20:59:20,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2022-07-20 20:59:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-07-20 20:59:20,936 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2022-07-20 20:59:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:20,936 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-07-20 20:59:20,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-07-20 20:59:20,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-20 20:59:20,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:20,937 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:20,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 20:59:21,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:21,151 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash -196447192, now seen corresponding path program 32 times [2022-07-20 20:59:21,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:21,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857193111] [2022-07-20 20:59:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:21,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:21,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:21,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857193111] [2022-07-20 20:59:21,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857193111] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:21,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28070212] [2022-07-20 20:59:21,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:59:21,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:21,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:21,958 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:21,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 20:59:22,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:59:22,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:22,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-20 20:59:22,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:22,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:59:23,010 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 47 treesize of output 23 [2022-07-20 20:59:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:23,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:23,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:23,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:23,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:23,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:23,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28070212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:23,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:23,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 59 [2022-07-20 20:59:23,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911624888] [2022-07-20 20:59:23,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:23,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-20 20:59:23,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:23,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-20 20:59:23,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3270, Unknown=0, NotChecked=0, Total=3422 [2022-07-20 20:59:23,359 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:24,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:24,857 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2022-07-20 20:59:24,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-20 20:59:24,858 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-07-20 20:59:24,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:24,858 INFO L225 Difference]: With dead ends: 85 [2022-07-20 20:59:24,859 INFO L226 Difference]: Without dead ends: 83 [2022-07-20 20:59:24,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=298, Invalid=6022, Unknown=0, NotChecked=0, Total=6320 [2022-07-20 20:59:24,859 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 2892 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 2969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:24,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 967 Invalid, 2969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2892 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 20:59:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-20 20:59:24,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2022-07-20 20:59:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-07-20 20:59:24,872 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2022-07-20 20:59:24,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:24,872 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-07-20 20:59:24,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:24,873 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-07-20 20:59:24,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-20 20:59:24,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:24,873 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:24,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-20 20:59:25,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-20 20:59:25,074 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:25,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1686921045, now seen corresponding path program 33 times [2022-07-20 20:59:25,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:25,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423592115] [2022-07-20 20:59:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:25,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:25,549 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:25,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:25,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423592115] [2022-07-20 20:59:25,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423592115] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:25,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597907761] [2022-07-20 20:59:25,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:59:25,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:25,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:25,551 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:25,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 20:59:26,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-07-20 20:59:26,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:26,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 20:59:26,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:27,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:27,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597907761] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:27,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:27,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2022-07-20 20:59:27,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141255281] [2022-07-20 20:59:27,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:27,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-20 20:59:27,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-20 20:59:27,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2022-07-20 20:59:27,420 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:27,803 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2022-07-20 20:59:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-20 20:59:27,803 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 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 80 [2022-07-20 20:59:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:27,804 INFO L225 Difference]: With dead ends: 149 [2022-07-20 20:59:27,804 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 20:59:27,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1512, Invalid=4968, Unknown=0, NotChecked=0, Total=6480 [2022-07-20 20:59:27,805 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 266 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:27,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 172 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:59:27,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 20:59:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-07-20 20:59:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-07-20 20:59:27,823 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2022-07-20 20:59:27,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:27,823 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-07-20 20:59:27,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:27,824 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-07-20 20:59:27,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-20 20:59:27,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:27,824 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:27,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-20 20:59:28,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-20 20:59:28,025 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:28,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1697760395, now seen corresponding path program 34 times [2022-07-20 20:59:28,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:28,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474252683] [2022-07-20 20:59:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:28,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:28,992 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:28,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474252683] [2022-07-20 20:59:28,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474252683] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159104141] [2022-07-20 20:59:28,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:59:28,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:28,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:28,993 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:28,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 20:59:29,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:59:29,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:29,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-20 20:59:29,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:29,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:59:30,099 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 47 treesize of output 23 [2022-07-20 20:59:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:30,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:30,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:30,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:30,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:30,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:30,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159104141] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:30,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:30,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 62 [2022-07-20 20:59:30,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170832291] [2022-07-20 20:59:30,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-20 20:59:30,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-20 20:59:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3622, Unknown=0, NotChecked=0, Total=3782 [2022-07-20 20:59:30,457 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 62 states, 62 states have (on average 2.2580645161290325) internal successors, (140), 62 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:32,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:32,003 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2022-07-20 20:59:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-20 20:59:32,004 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2580645161290325) internal successors, (140), 62 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-20 20:59:32,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:32,004 INFO L225 Difference]: With dead ends: 89 [2022-07-20 20:59:32,004 INFO L226 Difference]: Without dead ends: 87 [2022-07-20 20:59:32,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 136 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=313, Invalid=6659, Unknown=0, NotChecked=0, Total=6972 [2022-07-20 20:59:32,005 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 3013 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 3013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:32,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1008 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 3013 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 20:59:32,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-20 20:59:32,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-07-20 20:59:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:32,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-20 20:59:32,019 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2022-07-20 20:59:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:32,020 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-20 20:59:32,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2580645161290325) internal successors, (140), 62 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-20 20:59:32,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-20 20:59:32,020 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:32,020 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:32,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-20 20:59:32,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-20 20:59:32,221 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash 449843218, now seen corresponding path program 35 times [2022-07-20 20:59:32,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:32,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676589719] [2022-07-20 20:59:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:32,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676589719] [2022-07-20 20:59:32,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676589719] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:32,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782801099] [2022-07-20 20:59:32,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:59:32,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:32,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:32,748 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:32,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 20:59:33,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-20 20:59:33,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:33,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-20 20:59:33,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:33,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:34,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782801099] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:34,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:34,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2022-07-20 20:59:34,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078043936] [2022-07-20 20:59:34,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:34,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-20 20:59:34,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:34,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-20 20:59:34,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 20:59:34,042 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:34,425 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2022-07-20 20:59:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-20 20:59:34,426 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 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 84 [2022-07-20 20:59:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:34,426 INFO L225 Difference]: With dead ends: 156 [2022-07-20 20:59:34,426 INFO L226 Difference]: Without dead ends: 92 [2022-07-20 20:59:34,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1835 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1661, Invalid=5479, Unknown=0, NotChecked=0, Total=7140 [2022-07-20 20:59:34,427 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 268 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:34,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 171 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:59:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-20 20:59:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2022-07-20 20:59:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:34,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-07-20 20:59:34,441 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2022-07-20 20:59:34,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:34,441 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-07-20 20:59:34,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:34,442 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-07-20 20:59:34,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-20 20:59:34,442 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:34,442 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:34,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-20 20:59:34,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:34,643 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:34,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash -751572408, now seen corresponding path program 36 times [2022-07-20 20:59:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:34,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719390276] [2022-07-20 20:59:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:35,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:35,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719390276] [2022-07-20 20:59:35,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719390276] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:35,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040049890] [2022-07-20 20:59:35,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:59:35,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:35,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:35,725 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:35,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 20:59:36,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-07-20 20:59:36,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:36,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 89 conjunts are in the unsatisfiable core [2022-07-20 20:59:36,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:36,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:59:37,730 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 47 treesize of output 23 [2022-07-20 20:59:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:37,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:38,041 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:38,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:38,051 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 16 treesize of output 14 [2022-07-20 20:59:38,053 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 32 treesize of output 28 [2022-07-20 20:59:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:38,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040049890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:38,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:38,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 65 [2022-07-20 20:59:38,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446549937] [2022-07-20 20:59:38,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:38,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-20 20:59:38,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:38,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-20 20:59:38,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3992, Unknown=0, NotChecked=0, Total=4160 [2022-07-20 20:59:38,110 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 65 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 65 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:39,832 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2022-07-20 20:59:39,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-20 20:59:39,832 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 65 states have internal predecessors, (147), 0 states have call successors, (0), 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 85 [2022-07-20 20:59:39,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:39,833 INFO L225 Difference]: With dead ends: 93 [2022-07-20 20:59:39,833 INFO L226 Difference]: Without dead ends: 91 [2022-07-20 20:59:39,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=328, Invalid=7328, Unknown=0, NotChecked=0, Total=7656 [2022-07-20 20:59:39,834 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 30 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 3378 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1139 SdHoareTripleChecker+Invalid, 3462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:39,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1139 Invalid, 3462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3378 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 20:59:39,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-20 20:59:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2022-07-20 20:59:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:39,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-07-20 20:59:39,853 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2022-07-20 20:59:39,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:39,853 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-07-20 20:59:39,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.2615384615384615) internal successors, (147), 65 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:39,853 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-07-20 20:59:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-20 20:59:39,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:39,854 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:39,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-20 20:59:40,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-20 20:59:40,059 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:40,060 INFO L85 PathProgramCache]: Analyzing trace with hash -424299211, now seen corresponding path program 37 times [2022-07-20 20:59:40,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:40,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708460072] [2022-07-20 20:59:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:40,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:40,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:40,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708460072] [2022-07-20 20:59:40,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708460072] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:40,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426616993] [2022-07-20 20:59:40,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 20:59:40,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:40,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:40,613 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:40,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-20 20:59:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:40,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 20:59:40,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:41,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:41,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426616993] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:41,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:41,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2022-07-20 20:59:41,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493862584] [2022-07-20 20:59:41,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:41,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-20 20:59:41,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:41,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-20 20:59:41,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2022-07-20 20:59:41,579 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:41,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:41,981 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2022-07-20 20:59:41,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-20 20:59:41,981 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 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 88 [2022-07-20 20:59:41,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:41,982 INFO L225 Difference]: With dead ends: 163 [2022-07-20 20:59:41,982 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 20:59:41,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2022-07-20 20:59:41,983 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 226 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:41,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 219 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:59:41,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 20:59:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2022-07-20 20:59:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-07-20 20:59:42,000 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2022-07-20 20:59:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:42,000 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-07-20 20:59:42,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-07-20 20:59:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-20 20:59:42,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:42,000 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:42,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-20 20:59:42,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-20 20:59:42,201 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:42,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:42,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1198160789, now seen corresponding path program 38 times [2022-07-20 20:59:42,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:42,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706418272] [2022-07-20 20:59:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:43,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:43,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706418272] [2022-07-20 20:59:43,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706418272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:43,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067765025] [2022-07-20 20:59:43,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:59:43,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:43,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:43,363 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:43,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-20 20:59:43,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:59:43,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:43,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-20 20:59:43,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:43,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:59:44,648 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 47 treesize of output 23 [2022-07-20 20:59:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:44,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:45,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:45,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:45,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:45,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:45,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067765025] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:45,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:45,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 68 [2022-07-20 20:59:45,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125891250] [2022-07-20 20:59:45,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:45,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-20 20:59:45,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-20 20:59:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=4380, Unknown=0, NotChecked=0, Total=4556 [2022-07-20 20:59:45,130 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 68 states, 68 states have (on average 2.264705882352941) internal successors, (154), 68 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:46,963 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2022-07-20 20:59:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-20 20:59:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.264705882352941) internal successors, (154), 68 states have internal predecessors, (154), 0 states have call successors, (0), 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 89 [2022-07-20 20:59:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:46,964 INFO L225 Difference]: With dead ends: 97 [2022-07-20 20:59:46,964 INFO L226 Difference]: Without dead ends: 95 [2022-07-20 20:59:46,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 150 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=343, Invalid=8029, Unknown=0, NotChecked=0, Total=8372 [2022-07-20 20:59:46,965 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 30 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 3602 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 3689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:46,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1211 Invalid, 3689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3602 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 20:59:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-20 20:59:46,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2022-07-20 20:59:46,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-07-20 20:59:46,984 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2022-07-20 20:59:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:46,985 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-07-20 20:59:46,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.264705882352941) internal successors, (154), 68 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-07-20 20:59:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-20 20:59:46,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:46,986 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:47,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-20 20:59:47,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:47,195 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1069925426, now seen corresponding path program 39 times [2022-07-20 20:59:47,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:47,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215999508] [2022-07-20 20:59:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:47,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:47,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215999508] [2022-07-20 20:59:47,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215999508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:47,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734657738] [2022-07-20 20:59:47,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:59:47,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:47,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:47,896 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:47,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-20 20:59:49,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-07-20 20:59:49,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:49,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 20:59:49,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:50,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:50,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734657738] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:50,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:50,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2022-07-20 20:59:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285393660] [2022-07-20 20:59:50,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:50,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-20 20:59:50,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:50,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-20 20:59:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2022-07-20 20:59:50,378 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:50,819 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2022-07-20 20:59:50,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-20 20:59:50,828 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-20 20:59:50,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:50,829 INFO L225 Difference]: With dead ends: 170 [2022-07-20 20:59:50,829 INFO L226 Difference]: Without dead ends: 100 [2022-07-20 20:59:50,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2022-07-20 20:59:50,834 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 316 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:50,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 213 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:59:50,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-20 20:59:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2022-07-20 20:59:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-07-20 20:59:50,865 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2022-07-20 20:59:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:50,866 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-07-20 20:59:50,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-07-20 20:59:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-20 20:59:50,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:50,867 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:50,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-20 20:59:51,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-20 20:59:51,081 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:51,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:51,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1914636392, now seen corresponding path program 40 times [2022-07-20 20:59:51,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:51,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410956798] [2022-07-20 20:59:51,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:51,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:52,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:52,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410956798] [2022-07-20 20:59:52,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410956798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:52,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044862482] [2022-07-20 20:59:52,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:59:52,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:52,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:52,287 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:52,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-20 20:59:52,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:59:52,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:52,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-20 20:59:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:52,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 20:59:53,729 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 47 treesize of output 23 [2022-07-20 20:59:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:53,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:54,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:54,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:54,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 20:59:54,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 20:59:54,137 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:54,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044862482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:54,137 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:54,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 71 [2022-07-20 20:59:54,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215083391] [2022-07-20 20:59:54,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:54,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-20 20:59:54,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:54,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-20 20:59:54,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=4786, Unknown=0, NotChecked=0, Total=4970 [2022-07-20 20:59:54,139 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 71 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:56,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:56,318 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2022-07-20 20:59:56,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-20 20:59:56,318 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 71 states have internal predecessors, (161), 0 states have call successors, (0), 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 93 [2022-07-20 20:59:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:56,319 INFO L225 Difference]: With dead ends: 101 [2022-07-20 20:59:56,319 INFO L226 Difference]: Without dead ends: 99 [2022-07-20 20:59:56,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 157 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=358, Invalid=8762, Unknown=0, NotChecked=0, Total=9120 [2022-07-20 20:59:56,320 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 4094 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 4185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 4094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:56,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1339 Invalid, 4185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 4094 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 20:59:56,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-20 20:59:56,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-07-20 20:59:56,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-07-20 20:59:56,347 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2022-07-20 20:59:56,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:56,347 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-07-20 20:59:56,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.267605633802817) internal successors, (161), 71 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:56,347 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-07-20 20:59:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-20 20:59:56,348 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:56,348 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:56,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-07-20 20:59:56,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:56,567 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:56,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:56,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1771856661, now seen corresponding path program 41 times [2022-07-20 20:59:56,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:56,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467636033] [2022-07-20 20:59:56,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:56,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:56,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:59:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:57,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:59:57,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467636033] [2022-07-20 20:59:57,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467636033] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:59:57,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764511126] [2022-07-20 20:59:57,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:59:57,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:57,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:59:57,232 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:59:57,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-20 20:59:57,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2022-07-20 20:59:57,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:59:57,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 20:59:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:59:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:58,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:59:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:59:58,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764511126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:59:58,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:59:58,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2022-07-20 20:59:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015955761] [2022-07-20 20:59:58,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:59:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-20 20:59:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:59:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-20 20:59:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4149, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 20:59:58,907 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:59:59,347 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2022-07-20 20:59:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-20 20:59:59,348 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 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 96 [2022-07-20 20:59:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:59:59,348 INFO L225 Difference]: With dead ends: 177 [2022-07-20 20:59:59,348 INFO L226 Difference]: Without dead ends: 104 [2022-07-20 20:59:59,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2387 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2150, Invalid=7162, Unknown=0, NotChecked=0, Total=9312 [2022-07-20 20:59:59,350 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 314 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:59:59,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 200 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:59:59,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-20 20:59:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2022-07-20 20:59:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-07-20 20:59:59,374 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2022-07-20 20:59:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:59:59,374 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-07-20 20:59:59,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:59:59,375 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-07-20 20:59:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-20 20:59:59,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:59:59,375 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:59:59,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-07-20 20:59:59,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:59:59,576 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:59:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:59:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2001953717, now seen corresponding path program 42 times [2022-07-20 20:59:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:59:59,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724849640] [2022-07-20 20:59:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:59:59,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:59:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:00,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:00:00,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724849640] [2022-07-20 21:00:00,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724849640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:00:00,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520317482] [2022-07-20 21:00:00,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:00:00,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:00,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:00:00,892 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:00:00,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-20 21:00:04,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2022-07-20 21:00:04,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:00:04,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-20 21:00:04,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:00:04,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:00:05,879 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 47 treesize of output 23 [2022-07-20 21:00:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:05,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:00:06,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:00:06,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:00:06,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:00:06,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:00:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:06,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520317482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:00:06,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:00:06,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 74 [2022-07-20 21:00:06,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539618980] [2022-07-20 21:00:06,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:00:06,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-20 21:00:06,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:00:06,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-20 21:00:06,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5210, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 21:00:06,315 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 74 states, 74 states have (on average 2.27027027027027) internal successors, (168), 74 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:08,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:00:08,455 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2022-07-20 21:00:08,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-20 21:00:08,456 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.27027027027027) internal successors, (168), 74 states have internal predecessors, (168), 0 states have call successors, (0), 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 97 [2022-07-20 21:00:08,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:00:08,456 INFO L225 Difference]: With dead ends: 105 [2022-07-20 21:00:08,456 INFO L226 Difference]: Without dead ends: 103 [2022-07-20 21:00:08,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 164 SyntacticMatches, 6 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=373, Invalid=9527, Unknown=0, NotChecked=0, Total=9900 [2022-07-20 21:00:08,457 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 4240 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 4336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 4240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 21:00:08,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1422 Invalid, 4336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 4240 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 21:00:08,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-20 21:00:08,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-07-20 21:00:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-07-20 21:00:08,476 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 97 [2022-07-20 21:00:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:00:08,476 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-07-20 21:00:08,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.27027027027027) internal successors, (168), 74 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-07-20 21:00:08,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-20 21:00:08,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:00:08,477 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:00:08,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-20 21:00:08,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-20 21:00:08,678 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:00:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:00:08,678 INFO L85 PathProgramCache]: Analyzing trace with hash -282517422, now seen corresponding path program 43 times [2022-07-20 21:00:08,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:00:08,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756811204] [2022-07-20 21:00:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:00:08,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:00:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:09,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:00:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756811204] [2022-07-20 21:00:09,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756811204] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:00:09,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936886101] [2022-07-20 21:00:09,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:00:09,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:09,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:00:09,374 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:00:09,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-20 21:00:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:09,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-20 21:00:09,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:00:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:10,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:00:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:10,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936886101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:00:10,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:00:10,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2022-07-20 21:00:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875702909] [2022-07-20 21:00:10,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:00:10,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-20 21:00:10,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:00:10,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-20 21:00:10,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4497, Unknown=0, NotChecked=0, Total=5852 [2022-07-20 21:00:10,559 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:11,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:00:11,055 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2022-07-20 21:00:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-20 21:00:11,055 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 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 100 [2022-07-20 21:00:11,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:00:11,056 INFO L225 Difference]: With dead ends: 184 [2022-07-20 21:00:11,056 INFO L226 Difference]: Without dead ends: 108 [2022-07-20 21:00:11,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2327, Invalid=7773, Unknown=0, NotChecked=0, Total=10100 [2022-07-20 21:00:11,057 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 292 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:00:11,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 255 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:00:11,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-20 21:00:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2022-07-20 21:00:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-07-20 21:00:11,078 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2022-07-20 21:00:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:00:11,078 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-07-20 21:00:11,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-07-20 21:00:11,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-20 21:00:11,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:00:11,079 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:00:11,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-20 21:00:11,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-20 21:00:11,305 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:00:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:00:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 745393800, now seen corresponding path program 44 times [2022-07-20 21:00:11,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:00:11,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71965044] [2022-07-20 21:00:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:00:11,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:00:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:12,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:00:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71965044] [2022-07-20 21:00:12,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71965044] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:00:12,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20950881] [2022-07-20 21:00:12,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:00:12,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:12,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:00:12,672 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:00:12,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-20 21:00:12,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:00:12,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:00:12,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 105 conjunts are in the unsatisfiable core [2022-07-20 21:00:12,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:00:12,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:00:14,350 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 47 treesize of output 23 [2022-07-20 21:00:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:14,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:00:14,735 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:00:14,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:00:14,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:00:14,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:00:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:14,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20950881] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:00:14,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:00:14,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 77 [2022-07-20 21:00:14,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385906881] [2022-07-20 21:00:14,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:00:14,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-20 21:00:14,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:00:14,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-20 21:00:14,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=5652, Unknown=0, NotChecked=0, Total=5852 [2022-07-20 21:00:14,820 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 77 states, 77 states have (on average 2.272727272727273) internal successors, (175), 77 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:00:17,217 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2022-07-20 21:00:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-20 21:00:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.272727272727273) internal successors, (175), 77 states have internal predecessors, (175), 0 states have call successors, (0), 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 101 [2022-07-20 21:00:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:00:17,218 INFO L225 Difference]: With dead ends: 109 [2022-07-20 21:00:17,218 INFO L226 Difference]: Without dead ends: 107 [2022-07-20 21:00:17,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 171 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1324 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=388, Invalid=10324, Unknown=0, NotChecked=0, Total=10712 [2022-07-20 21:00:17,219 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 4747 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1556 SdHoareTripleChecker+Invalid, 4845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 21:00:17,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1556 Invalid, 4845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 4747 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-20 21:00:17,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-20 21:00:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-07-20 21:00:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-07-20 21:00:17,241 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2022-07-20 21:00:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:00:17,241 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-07-20 21:00:17,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.272727272727273) internal successors, (175), 77 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-07-20 21:00:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-20 21:00:17,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:00:17,242 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:00:17,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-20 21:00:17,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-20 21:00:17,442 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:00:17,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:00:17,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1050568949, now seen corresponding path program 45 times [2022-07-20 21:00:17,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:00:17,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212982410] [2022-07-20 21:00:17,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:00:17,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:00:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:18,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:00:18,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212982410] [2022-07-20 21:00:18,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212982410] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:00:18,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984371612] [2022-07-20 21:00:18,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:00:18,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:18,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:00:18,229 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:00:18,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-20 21:00:24,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-07-20 21:00:24,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:00:25,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 21:00:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:00:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:26,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:00:26,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:26,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984371612] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:00:26,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:00:26,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2022-07-20 21:00:26,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852571025] [2022-07-20 21:00:26,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:00:26,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-20 21:00:26,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:00:26,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-20 21:00:26,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=4859, Unknown=0, NotChecked=0, Total=6320 [2022-07-20 21:00:26,259 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:00:26,778 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2022-07-20 21:00:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-20 21:00:26,779 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 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 104 [2022-07-20 21:00:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:00:26,779 INFO L225 Difference]: With dead ends: 191 [2022-07-20 21:00:26,780 INFO L226 Difference]: Without dead ends: 112 [2022-07-20 21:00:26,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2511, Invalid=8409, Unknown=0, NotChecked=0, Total=10920 [2022-07-20 21:00:26,781 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 390 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:00:26,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 196 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:00:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-20 21:00:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2022-07-20 21:00:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-07-20 21:00:26,813 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2022-07-20 21:00:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:00:26,813 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-07-20 21:00:26,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-07-20 21:00:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-20 21:00:26,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:00:26,814 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:00:26,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-20 21:00:27,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:27,015 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:00:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:00:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash -791344085, now seen corresponding path program 46 times [2022-07-20 21:00:27,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:00:27,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889856280] [2022-07-20 21:00:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:00:27,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:00:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:28,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:28,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:00:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889856280] [2022-07-20 21:00:28,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889856280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:00:28,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228837722] [2022-07-20 21:00:28,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:00:28,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:28,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:00:28,422 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:00:28,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-20 21:00:28,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:00:28,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:00:28,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-20 21:00:28,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:00:28,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:00:30,241 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 47 treesize of output 23 [2022-07-20 21:00:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:30,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:00:30,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:00:30,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:00:30,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:00:30,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:00:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:30,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228837722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:00:30,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:00:30,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 80 [2022-07-20 21:00:30,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569346184] [2022-07-20 21:00:30,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:00:30,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-20 21:00:30,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:00:30,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-20 21:00:30,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=6112, Unknown=0, NotChecked=0, Total=6320 [2022-07-20 21:00:30,714 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 80 states, 80 states have (on average 2.275) internal successors, (182), 80 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:33,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:00:33,244 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2022-07-20 21:00:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-20 21:00:33,245 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.275) internal successors, (182), 80 states have internal predecessors, (182), 0 states have call successors, (0), 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 105 [2022-07-20 21:00:33,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:00:33,245 INFO L225 Difference]: With dead ends: 113 [2022-07-20 21:00:33,245 INFO L226 Difference]: Without dead ends: 111 [2022-07-20 21:00:33,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 178 SyntacticMatches, 6 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=403, Invalid=11153, Unknown=0, NotChecked=0, Total=11556 [2022-07-20 21:00:33,247 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 1632 mSDsCounter, 0 mSdLazyCounter, 5068 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 5172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 5068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 21:00:33,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1663 Invalid, 5172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 5068 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-20 21:00:33,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-20 21:00:33,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-07-20 21:00:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-07-20 21:00:33,289 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 105 [2022-07-20 21:00:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:00:33,289 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-07-20 21:00:33,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.275) internal successors, (182), 80 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:33,289 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-07-20 21:00:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-20 21:00:33,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:00:33,290 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:00:33,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-20 21:00:33,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-20 21:00:33,508 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:00:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:00:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash 148644978, now seen corresponding path program 47 times [2022-07-20 21:00:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:00:33,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987818511] [2022-07-20 21:00:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:00:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:00:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:34,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:00:34,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987818511] [2022-07-20 21:00:34,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987818511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:00:34,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011543535] [2022-07-20 21:00:34,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:00:34,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:34,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:00:34,297 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:00:34,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-20 21:00:35,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-07-20 21:00:35,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:00:35,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-20 21:00:35,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:00:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:36,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:00:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:36,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011543535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:00:36,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:00:36,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2022-07-20 21:00:36,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525192836] [2022-07-20 21:00:36,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:00:36,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-20 21:00:36,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:00:36,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-20 21:00:36,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2022-07-20 21:00:36,298 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:00:36,838 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2022-07-20 21:00:36,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-20 21:00:36,839 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 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 108 [2022-07-20 21:00:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:00:36,839 INFO L225 Difference]: With dead ends: 198 [2022-07-20 21:00:36,840 INFO L226 Difference]: Without dead ends: 116 [2022-07-20 21:00:36,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3011 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2702, Invalid=9070, Unknown=0, NotChecked=0, Total=11772 [2022-07-20 21:00:36,841 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 356 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:00:36,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 270 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:00:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-20 21:00:36,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2022-07-20 21:00:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-07-20 21:00:36,874 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2022-07-20 21:00:36,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:00:36,874 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-07-20 21:00:36,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:36,874 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-07-20 21:00:36,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 21:00:36,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:00:36,875 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:00:36,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-20 21:00:37,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-20 21:00:37,101 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:00:37,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:00:37,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1946010456, now seen corresponding path program 48 times [2022-07-20 21:00:37,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:00:37,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595477895] [2022-07-20 21:00:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:00:37,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:00:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:38,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:00:38,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595477895] [2022-07-20 21:00:38,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595477895] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:00:38,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725633863] [2022-07-20 21:00:38,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:00:38,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:38,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:00:38,636 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:00:38,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-20 21:00:42,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2022-07-20 21:00:42,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:00:42,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 113 conjunts are in the unsatisfiable core [2022-07-20 21:00:42,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:00:42,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:00:44,028 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 47 treesize of output 23 [2022-07-20 21:00:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:44,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:00:44,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:00:44,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:00:44,425 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:00:44,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:00:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:44,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725633863] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:00:44,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:00:44,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 83 [2022-07-20 21:00:44,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103906384] [2022-07-20 21:00:44,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:00:44,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-20 21:00:44,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:00:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-20 21:00:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=6590, Unknown=0, NotChecked=0, Total=6806 [2022-07-20 21:00:44,508 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 83 states, 83 states have (on average 2.2771084337349397) internal successors, (189), 83 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:00:47,211 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2022-07-20 21:00:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-20 21:00:47,212 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.2771084337349397) internal successors, (189), 83 states have internal predecessors, (189), 0 states have call successors, (0), 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 109 [2022-07-20 21:00:47,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:00:47,214 INFO L225 Difference]: With dead ends: 117 [2022-07-20 21:00:47,214 INFO L226 Difference]: Without dead ends: 115 [2022-07-20 21:00:47,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 185 SyntacticMatches, 6 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=418, Invalid=12014, Unknown=0, NotChecked=0, Total=12432 [2022-07-20 21:00:47,215 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 35 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 5478 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 5585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 5478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 21:00:47,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1787 Invalid, 5585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 5478 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-20 21:00:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-20 21:00:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2022-07-20 21:00:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2022-07-20 21:00:47,252 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2022-07-20 21:00:47,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:00:47,252 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2022-07-20 21:00:47,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.2771084337349397) internal successors, (189), 83 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2022-07-20 21:00:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-20 21:00:47,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:00:47,253 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:00:47,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-20 21:00:47,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:47,467 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:00:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:00:47,468 INFO L85 PathProgramCache]: Analyzing trace with hash -124139819, now seen corresponding path program 49 times [2022-07-20 21:00:47,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:00:47,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516099580] [2022-07-20 21:00:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:00:47,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:00:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:48,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:00:48,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516099580] [2022-07-20 21:00:48,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516099580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:00:48,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236012642] [2022-07-20 21:00:48,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:00:48,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:48,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:00:48,312 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:00:48,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-20 21:00:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:48,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-20 21:00:48,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:00:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:49,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:00:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:49,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236012642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:00:49,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:00:49,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2022-07-20 21:00:49,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221689123] [2022-07-20 21:00:49,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:00:49,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-20 21:00:49,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:00:49,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-20 21:00:49,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=5625, Unknown=0, NotChecked=0, Total=7310 [2022-07-20 21:00:49,717 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:00:50,266 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2022-07-20 21:00:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-20 21:00:50,267 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 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 112 [2022-07-20 21:00:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:00:50,267 INFO L225 Difference]: With dead ends: 205 [2022-07-20 21:00:50,267 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 21:00:50,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3235 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2900, Invalid=9756, Unknown=0, NotChecked=0, Total=12656 [2022-07-20 21:00:50,270 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 366 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:00:50,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 248 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 21:00:50,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 21:00:50,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2022-07-20 21:00:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-07-20 21:00:50,307 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2022-07-20 21:00:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:00:50,307 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-07-20 21:00:50,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-07-20 21:00:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-20 21:00:50,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:00:50,308 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:00:50,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-20 21:00:50,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-20 21:00:50,515 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:00:50,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:00:50,516 INFO L85 PathProgramCache]: Analyzing trace with hash -840117237, now seen corresponding path program 50 times [2022-07-20 21:00:50,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:00:50,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747028547] [2022-07-20 21:00:50,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:00:50,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:00:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:52,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:00:52,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747028547] [2022-07-20 21:00:52,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747028547] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:00:52,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273034642] [2022-07-20 21:00:52,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:00:52,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:52,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:00:52,130 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:00:52,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-20 21:00:52,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:00:52,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:00:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 117 conjunts are in the unsatisfiable core [2022-07-20 21:00:52,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:00:52,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:00:54,143 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 47 treesize of output 23 [2022-07-20 21:00:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:54,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:00:54,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:00:54,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:00:54,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:00:54,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:00:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:54,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273034642] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:00:54,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:00:54,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 86 [2022-07-20 21:00:54,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880656326] [2022-07-20 21:00:54,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:00:54,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-20 21:00:54,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:00:54,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-20 21:00:54,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=7086, Unknown=0, NotChecked=0, Total=7310 [2022-07-20 21:00:54,634 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 86 states, 86 states have (on average 2.2790697674418605) internal successors, (196), 86 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:57,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:00:57,531 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2022-07-20 21:00:57,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-20 21:00:57,531 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2790697674418605) internal successors, (196), 86 states have internal predecessors, (196), 0 states have call successors, (0), 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 113 [2022-07-20 21:00:57,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:00:57,532 INFO L225 Difference]: With dead ends: 121 [2022-07-20 21:00:57,532 INFO L226 Difference]: Without dead ends: 119 [2022-07-20 21:00:57,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 192 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=433, Invalid=12907, Unknown=0, NotChecked=0, Total=13340 [2022-07-20 21:00:57,534 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 1877 mSDsCounter, 0 mSdLazyCounter, 5847 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 5957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 5847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:00:57,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1910 Invalid, 5957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 5847 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 21:00:57,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-20 21:00:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2022-07-20 21:00:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-07-20 21:00:57,560 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2022-07-20 21:00:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:00:57,561 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-07-20 21:00:57,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2790697674418605) internal successors, (196), 86 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:00:57,561 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-07-20 21:00:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-20 21:00:57,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:00:57,562 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:00:57,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-20 21:00:57,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:57,765 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:00:57,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:00:57,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1153380206, now seen corresponding path program 51 times [2022-07-20 21:00:57,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:00:57,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165213826] [2022-07-20 21:00:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:00:57,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:00:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:00:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:00:58,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:00:58,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165213826] [2022-07-20 21:00:58,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165213826] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:00:58,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445443002] [2022-07-20 21:00:58,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:00:58,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:00:58,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:00:58,679 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:00:58,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-20 21:01:04,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-07-20 21:01:04,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:01:04,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-20 21:01:04,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:01:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:05,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:01:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:05,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445443002] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:01:05,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:01:05,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2022-07-20 21:01:05,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941710113] [2022-07-20 21:01:05,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:01:05,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-20 21:01:05,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:01:05,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-20 21:01:05,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1803, Invalid=6029, Unknown=0, NotChecked=0, Total=7832 [2022-07-20 21:01:05,653 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:06,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:01:06,270 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2022-07-20 21:01:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-20 21:01:06,270 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 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 116 [2022-07-20 21:01:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:01:06,271 INFO L225 Difference]: With dead ends: 212 [2022-07-20 21:01:06,271 INFO L226 Difference]: Without dead ends: 124 [2022-07-20 21:01:06,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3105, Invalid=10467, Unknown=0, NotChecked=0, Total=13572 [2022-07-20 21:01:06,272 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 428 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:01:06,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 266 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:01:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-20 21:01:06,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2022-07-20 21:01:06,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-07-20 21:01:06,305 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2022-07-20 21:01:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:01:06,305 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-07-20 21:01:06,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-07-20 21:01:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-20 21:01:06,306 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:01:06,306 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:01:06,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-20 21:01:06,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-20 21:01:06,506 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:01:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:01:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1765692104, now seen corresponding path program 52 times [2022-07-20 21:01:06,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:01:06,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087319015] [2022-07-20 21:01:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:01:06,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:01:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:01:08,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:08,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:01:08,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087319015] [2022-07-20 21:01:08,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087319015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:01:08,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497447312] [2022-07-20 21:01:08,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:01:08,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:01:08,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:01:08,181 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:01:08,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-20 21:01:08,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:01:08,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:01:08,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 121 conjunts are in the unsatisfiable core [2022-07-20 21:01:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:01:08,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:01:10,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-07-20 21:01:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:10,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:01:10,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:01:10,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:01:10,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:01:10,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:01:10,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:10,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497447312] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:01:10,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:01:10,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 89 [2022-07-20 21:01:10,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690003681] [2022-07-20 21:01:10,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:01:10,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-20 21:01:10,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:01:10,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-20 21:01:10,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=7600, Unknown=0, NotChecked=0, Total=7832 [2022-07-20 21:01:10,826 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 89 states, 89 states have (on average 2.2808988764044944) internal successors, (203), 89 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:13,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:01:13,974 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2022-07-20 21:01:13,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-07-20 21:01:13,975 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.2808988764044944) internal successors, (203), 89 states have internal predecessors, (203), 0 states have call successors, (0), 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 117 [2022-07-20 21:01:13,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:01:13,975 INFO L225 Difference]: With dead ends: 125 [2022-07-20 21:01:13,975 INFO L226 Difference]: Without dead ends: 123 [2022-07-20 21:01:13,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 199 SyntacticMatches, 6 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=448, Invalid=13832, Unknown=0, NotChecked=0, Total=14280 [2022-07-20 21:01:13,976 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 6382 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 6499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 6382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:01:13,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2141 Invalid, 6499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 6382 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 21:01:13,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-20 21:01:14,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2022-07-20 21:01:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-07-20 21:01:14,023 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2022-07-20 21:01:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:01:14,023 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-07-20 21:01:14,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.2808988764044944) internal successors, (203), 89 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-07-20 21:01:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-20 21:01:14,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:01:14,024 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:01:14,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-20 21:01:14,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-20 21:01:14,225 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:01:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:01:14,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1273789621, now seen corresponding path program 53 times [2022-07-20 21:01:14,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:01:14,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097524395] [2022-07-20 21:01:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:01:14,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:01:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:01:15,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:15,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:01:15,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097524395] [2022-07-20 21:01:15,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097524395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:01:15,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074761367] [2022-07-20 21:01:15,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:01:15,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:01:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:01:15,179 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:01:15,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-20 21:01:16,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2022-07-20 21:01:16,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:01:16,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-20 21:01:16,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:01:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:17,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:01:17,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:17,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074761367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:01:17,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:01:17,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2022-07-20 21:01:17,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629007281] [2022-07-20 21:01:17,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:01:17,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-20 21:01:17,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:01:17,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-20 21:01:17,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1925, Invalid=6447, Unknown=0, NotChecked=0, Total=8372 [2022-07-20 21:01:17,791 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:01:18,452 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2022-07-20 21:01:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-20 21:01:18,452 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 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 120 [2022-07-20 21:01:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:01:18,453 INFO L225 Difference]: With dead ends: 219 [2022-07-20 21:01:18,453 INFO L226 Difference]: Without dead ends: 128 [2022-07-20 21:01:18,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3707 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3317, Invalid=11203, Unknown=0, NotChecked=0, Total=14520 [2022-07-20 21:01:18,454 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 398 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:01:18,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 255 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:01:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-20 21:01:18,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2022-07-20 21:01:18,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-07-20 21:01:18,495 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 120 [2022-07-20 21:01:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:01:18,495 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-07-20 21:01:18,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-07-20 21:01:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-20 21:01:18,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:01:18,496 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:01:18,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-20 21:01:18,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:01:18,711 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:01:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:01:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash -565054485, now seen corresponding path program 54 times [2022-07-20 21:01:18,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:01:18,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222173134] [2022-07-20 21:01:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:01:18,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:01:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:01:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:20,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:01:20,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222173134] [2022-07-20 21:01:20,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222173134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:01:20,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233748256] [2022-07-20 21:01:20,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:01:20,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:01:20,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:01:20,535 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:01:20,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-20 21:01:24,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-07-20 21:01:24,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:01:24,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 125 conjunts are in the unsatisfiable core [2022-07-20 21:01:24,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:01:24,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:01:26,736 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 47 treesize of output 23 [2022-07-20 21:01:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:26,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:01:27,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:01:27,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:01:27,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:01:27,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:01:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:27,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233748256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:01:27,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:01:27,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 92 [2022-07-20 21:01:27,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162927762] [2022-07-20 21:01:27,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:01:27,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-20 21:01:27,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:01:27,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-20 21:01:27,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=8132, Unknown=0, NotChecked=0, Total=8372 [2022-07-20 21:01:27,278 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 92 states, 92 states have (on average 2.282608695652174) internal successors, (210), 92 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:01:30,575 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2022-07-20 21:01:30,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-20 21:01:30,575 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.282608695652174) internal successors, (210), 92 states have internal predecessors, (210), 0 states have call successors, (0), 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 121 [2022-07-20 21:01:30,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:01:30,576 INFO L225 Difference]: With dead ends: 129 [2022-07-20 21:01:30,576 INFO L226 Difference]: Without dead ends: 127 [2022-07-20 21:01:30,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 206 SyntacticMatches, 6 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=463, Invalid=14789, Unknown=0, NotChecked=0, Total=15252 [2022-07-20 21:01:30,577 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 6716 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 6834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 6716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:01:30,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2195 Invalid, 6834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 6716 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-20 21:01:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-20 21:01:30,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-07-20 21:01:30,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-07-20 21:01:30,627 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2022-07-20 21:01:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:01:30,627 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-07-20 21:01:30,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.282608695652174) internal successors, (210), 92 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-07-20 21:01:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-20 21:01:30,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:01:30,628 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:01:30,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-20 21:01:30,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:01:30,831 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:01:30,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:01:30,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1556536142, now seen corresponding path program 55 times [2022-07-20 21:01:30,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:01:30,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891544318] [2022-07-20 21:01:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:01:30,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:01:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:01:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:31,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:01:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891544318] [2022-07-20 21:01:31,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891544318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:01:31,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047525800] [2022-07-20 21:01:31,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:01:31,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:01:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:01:31,811 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:01:31,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-20 21:01:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:01:32,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-20 21:01:32,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:01:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:33,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:01:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:33,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047525800] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:01:33,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:01:33,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2022-07-20 21:01:33,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794502287] [2022-07-20 21:01:33,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:01:33,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-20 21:01:33,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:01:33,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-20 21:01:33,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=6879, Unknown=0, NotChecked=0, Total=8930 [2022-07-20 21:01:33,547 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:01:34,214 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2022-07-20 21:01:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-20 21:01:34,214 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 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 124 [2022-07-20 21:01:34,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:01:34,215 INFO L225 Difference]: With dead ends: 226 [2022-07-20 21:01:34,215 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 21:01:34,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3955 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3536, Invalid=11964, Unknown=0, NotChecked=0, Total=15500 [2022-07-20 21:01:34,216 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 420 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:01:34,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 322 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:01:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 21:01:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-07-20 21:01:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:34,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-07-20 21:01:34,248 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 124 [2022-07-20 21:01:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:01:34,249 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-07-20 21:01:34,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-07-20 21:01:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-20 21:01:34,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:01:34,250 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:01:34,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-07-20 21:01:34,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:01:34,451 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:01:34,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:01:34,451 INFO L85 PathProgramCache]: Analyzing trace with hash 184815848, now seen corresponding path program 56 times [2022-07-20 21:01:34,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:01:34,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70176871] [2022-07-20 21:01:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:01:34,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:01:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:01:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:36,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:01:36,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70176871] [2022-07-20 21:01:36,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70176871] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:01:36,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876339054] [2022-07-20 21:01:36,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:01:36,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:01:36,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:01:36,527 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:01:36,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-20 21:01:36,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:01:36,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:01:36,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 129 conjunts are in the unsatisfiable core [2022-07-20 21:01:36,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:01:36,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:01:38,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2022-07-20 21:01:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:39,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:01:39,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:01:39,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:01:39,459 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:01:39,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:01:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:39,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876339054] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:01:39,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:01:39,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 95 [2022-07-20 21:01:39,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969652441] [2022-07-20 21:01:39,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:01:39,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-20 21:01:39,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:01:39,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-20 21:01:39,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=8682, Unknown=0, NotChecked=0, Total=8930 [2022-07-20 21:01:39,555 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 95 states, 95 states have (on average 2.2842105263157895) internal successors, (217), 95 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:43,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:01:43,168 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2022-07-20 21:01:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-20 21:01:43,169 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2842105263157895) internal successors, (217), 95 states have internal predecessors, (217), 0 states have call successors, (0), 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 125 [2022-07-20 21:01:43,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:01:43,169 INFO L225 Difference]: With dead ends: 133 [2022-07-20 21:01:43,169 INFO L226 Difference]: Without dead ends: 131 [2022-07-20 21:01:43,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 213 SyntacticMatches, 6 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=478, Invalid=15778, Unknown=0, NotChecked=0, Total=16256 [2022-07-20 21:01:43,170 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 40 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 7510 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 7634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 7510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:01:43,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2509 Invalid, 7634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 7510 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 21:01:43,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-20 21:01:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2022-07-20 21:01:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-07-20 21:01:43,200 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2022-07-20 21:01:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:01:43,200 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-07-20 21:01:43,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2842105263157895) internal successors, (217), 95 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:01:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-07-20 21:01:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-20 21:01:43,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:01:43,201 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:01:43,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-20 21:01:43,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-20 21:01:43,402 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:01:43,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:01:43,402 INFO L85 PathProgramCache]: Analyzing trace with hash -294352235, now seen corresponding path program 57 times [2022-07-20 21:01:43,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:01:43,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104226988] [2022-07-20 21:01:43,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:01:43,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:01:43,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:01:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:01:44,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:01:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104226988] [2022-07-20 21:01:44,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104226988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:01:44,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122895891] [2022-07-20 21:01:44,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:01:44,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:01:44,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:01:44,432 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:01:44,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-20 21:02:02,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2022-07-20 21:02:02,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:02:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-20 21:02:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:02:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:02:04,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:02:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:02:04,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122895891] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:02:04,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:02:04,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2022-07-20 21:02:04,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458494650] [2022-07-20 21:02:04,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:02:04,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-07-20 21:02:04,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:02:04,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-07-20 21:02:04,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=7325, Unknown=0, NotChecked=0, Total=9506 [2022-07-20 21:02:04,222 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:02:04,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:02:04,892 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2022-07-20 21:02:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-20 21:02:04,893 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 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 128 [2022-07-20 21:02:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:02:04,893 INFO L225 Difference]: With dead ends: 233 [2022-07-20 21:02:04,893 INFO L226 Difference]: Without dead ends: 136 [2022-07-20 21:02:04,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3762, Invalid=12750, Unknown=0, NotChecked=0, Total=16512 [2022-07-20 21:02:04,895 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 370 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:02:04,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 332 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 21:02:04,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-20 21:02:04,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2022-07-20 21:02:04,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:02:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-07-20 21:02:04,925 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 128 [2022-07-20 21:02:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:02:04,925 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-07-20 21:02:04,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:02:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-07-20 21:02:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-20 21:02:04,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:02:04,925 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:02:04,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-20 21:02:05,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-20 21:02:05,126 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:02:05,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:02:05,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1642228683, now seen corresponding path program 58 times [2022-07-20 21:02:05,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:02:05,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46378607] [2022-07-20 21:02:05,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:02:05,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:02:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:02:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:02:07,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:02:07,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46378607] [2022-07-20 21:02:07,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46378607] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:02:07,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446123436] [2022-07-20 21:02:07,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:02:07,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:02:07,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:02:07,145 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:02:07,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-20 21:02:07,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:02:07,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:02:07,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 133 conjunts are in the unsatisfiable core [2022-07-20 21:02:07,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:02:07,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11