./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a94ea84ce989fbbbaf2c8eaba75d5160290d15621b4e8c8582440d0d85685d8d --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:47:34,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:47:34,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:47:34,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:47:34,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:47:34,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:47:34,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:47:34,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:47:34,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:47:34,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:47:34,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:47:34,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:47:34,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:47:34,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:47:34,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:47:34,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:47:34,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:47:34,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:47:34,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:47:34,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:47:34,876 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:47:34,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:47:34,878 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:47:34,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:47:34,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:47:34,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:47:34,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:47:34,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:47:34,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:47:34,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:47:34,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:47:34,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:47:34,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:47:34,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:47:34,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:47:34,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:47:34,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:47:34,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:47:34,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:47:34,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:47:34,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:47:34,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:47:34,893 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:47:34,909 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:47:34,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:47:34,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:47:34,912 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:47:34,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:47:34,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:47:34,913 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:47:34,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:47:34,913 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:47:34,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:47:34,914 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:47:34,914 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:47:34,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:47:34,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:47:34,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:47:34,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:47:34,915 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:47:34,915 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:47:34,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:47:34,915 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:47:34,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:47:34,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:47:34,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:47:34,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:47:34,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:47:34,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:47:34,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:47:34,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:47:34,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:47:34,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:47:34,917 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:47:34,917 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:47:34,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:47:34,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a94ea84ce989fbbbaf2c8eaba75d5160290d15621b4e8c8582440d0d85685d8d [2022-07-11 23:47:35,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:47:35,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:47:35,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:47:35,136 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:47:35,136 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:47:35,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c [2022-07-11 23:47:35,176 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/386ddc43f/1b4c257bd45741fd9abfe2771556fd7a/FLAGee1325d52 [2022-07-11 23:47:35,644 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:47:35,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_clnt.blast.01.i.cil-1.c [2022-07-11 23:47:35,656 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/386ddc43f/1b4c257bd45741fd9abfe2771556fd7a/FLAGee1325d52 [2022-07-11 23:47:35,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/386ddc43f/1b4c257bd45741fd9abfe2771556fd7a [2022-07-11 23:47:35,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:47:35,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:47:35,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:47:35,676 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:47:35,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:47:35,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:47:35" (1/1) ... [2022-07-11 23:47:35,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6289f88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:35, skipping insertion in model container [2022-07-11 23:47:35,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:47:35" (1/1) ... [2022-07-11 23:47:35,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:47:35,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:47:35,995 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/openssl/s3_clnt.blast.01.i.cil-1.c[65523,65536] [2022-07-11 23:47:36,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:47:36,009 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:47:36,101 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/openssl/s3_clnt.blast.01.i.cil-1.c[65523,65536] [2022-07-11 23:47:36,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:47:36,113 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:47:36,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36 WrapperNode [2022-07-11 23:47:36,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:47:36,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:47:36,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:47:36,115 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:47:36,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (1/1) ... [2022-07-11 23:47:36,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (1/1) ... [2022-07-11 23:47:36,165 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 724 [2022-07-11 23:47:36,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:47:36,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:47:36,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:47:36,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:47:36,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (1/1) ... [2022-07-11 23:47:36,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (1/1) ... [2022-07-11 23:47:36,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (1/1) ... [2022-07-11 23:47:36,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (1/1) ... [2022-07-11 23:47:36,238 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (1/1) ... [2022-07-11 23:47:36,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (1/1) ... [2022-07-11 23:47:36,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (1/1) ... [2022-07-11 23:47:36,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:47:36,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:47:36,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:47:36,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:47:36,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (1/1) ... [2022-07-11 23:47:36,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:47:36,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:47:36,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 23:47:36,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 23:47:36,437 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:47:36,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-11 23:47:36,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:47:36,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:47:36,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-11 23:47:36,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:47:36,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-11 23:47:36,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:47:36,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:47:36,658 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:47:36,660 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:47:36,688 WARN L811 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-07-11 23:47:39,354 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2022-07-11 23:47:39,354 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2022-07-11 23:47:39,355 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:47:39,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:47:39,362 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-11 23:47:39,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:47:39 BoogieIcfgContainer [2022-07-11 23:47:39,363 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:47:39,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:47:39,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:47:39,369 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:47:39,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:47:35" (1/3) ... [2022-07-11 23:47:39,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39be2791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:47:39, skipping insertion in model container [2022-07-11 23:47:39,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:47:36" (2/3) ... [2022-07-11 23:47:39,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39be2791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:47:39, skipping insertion in model container [2022-07-11 23:47:39,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:47:39" (3/3) ... [2022-07-11 23:47:39,371 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.01.i.cil-1.c [2022-07-11 23:47:39,380 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:47:39,381 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:47:39,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:47:39,439 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@574f7980, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24b4c626 [2022-07-11 23:47:39,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:47:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-11 23:47:39,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:39,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:39,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:39,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1457703966, now seen corresponding path program 1 times [2022-07-11 23:47:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:39,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717163837] [2022-07-11 23:47:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:39,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:39,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:39,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717163837] [2022-07-11 23:47:39,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717163837] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:39,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:39,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:39,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886208556] [2022-07-11 23:47:39,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:39,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:39,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:40,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:40,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:40,013 INFO L87 Difference]: Start difference. First operand has 131 states, 129 states have (on average 1.689922480620155) internal successors, (218), 130 states have internal predecessors, (218), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:42,037 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:42,474 INFO L93 Difference]: Finished difference Result 365 states and 610 transitions. [2022-07-11 23:47:42,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:42,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-11 23:47:42,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:42,485 INFO L225 Difference]: With dead ends: 365 [2022-07-11 23:47:42,486 INFO L226 Difference]: Without dead ends: 208 [2022-07-11 23:47:42,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:42,490 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 143 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:42,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 381 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-11 23:47:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-11 23:47:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 138. [2022-07-11 23:47:42,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.5547445255474452) internal successors, (213), 137 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 213 transitions. [2022-07-11 23:47:42,539 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 213 transitions. Word has length 24 [2022-07-11 23:47:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:42,539 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 213 transitions. [2022-07-11 23:47:42,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:42,540 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 213 transitions. [2022-07-11 23:47:42,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-11 23:47:42,541 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:42,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:42,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:47:42,541 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:42,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:42,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2051399351, now seen corresponding path program 1 times [2022-07-11 23:47:42,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:42,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039235368] [2022-07-11 23:47:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:42,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 23:47:42,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039235368] [2022-07-11 23:47:42,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039235368] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:42,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:42,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:42,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818120764] [2022-07-11 23:47:42,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:42,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:42,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:42,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:42,762 INFO L87 Difference]: Start difference. First operand 138 states and 213 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:44,780 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:45,071 INFO L93 Difference]: Finished difference Result 363 states and 558 transitions. [2022-07-11 23:47:45,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:45,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-11 23:47:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:45,075 INFO L225 Difference]: With dead ends: 363 [2022-07-11 23:47:45,075 INFO L226 Difference]: Without dead ends: 232 [2022-07-11 23:47:45,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:45,082 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 109 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:45,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 270 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:47:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-11 23:47:45,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2022-07-11 23:47:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5864197530864197) internal successors, (257), 162 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 257 transitions. [2022-07-11 23:47:45,099 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 257 transitions. Word has length 25 [2022-07-11 23:47:45,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:45,099 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 257 transitions. [2022-07-11 23:47:45,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 257 transitions. [2022-07-11 23:47:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:47:45,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:45,101 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:45,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:47:45,102 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1317317884, now seen corresponding path program 1 times [2022-07-11 23:47:45,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:45,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415309741] [2022-07-11 23:47:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:45,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:47:45,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:45,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415309741] [2022-07-11 23:47:45,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415309741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:45,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:45,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:45,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124879629] [2022-07-11 23:47:45,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:45,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:45,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:45,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:45,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:45,213 INFO L87 Difference]: Start difference. First operand 163 states and 257 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2022-07-11 23:47:47,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:47,354 INFO L93 Difference]: Finished difference Result 323 states and 508 transitions. [2022-07-11 23:47:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:47,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) Word has length 45 [2022-07-11 23:47:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:47,356 INFO L225 Difference]: With dead ends: 323 [2022-07-11 23:47:47,356 INFO L226 Difference]: Without dead ends: 167 [2022-07-11 23:47:47,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:47,357 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 7 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:47,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 409 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-11 23:47:47,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-11 23:47:47,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-07-11 23:47:47,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5757575757575757) internal successors, (260), 165 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:47,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 260 transitions. [2022-07-11 23:47:47,363 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 260 transitions. Word has length 45 [2022-07-11 23:47:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:47,363 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 260 transitions. [2022-07-11 23:47:47,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 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) [2022-07-11 23:47:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 260 transitions. [2022-07-11 23:47:47,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:47:47,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:47,365 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:47,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 23:47:47,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash -419240430, now seen corresponding path program 1 times [2022-07-11 23:47:47,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:47,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123916669] [2022-07-11 23:47:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:47,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 23:47:47,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:47,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123916669] [2022-07-11 23:47:47,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123916669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:47,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:47,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:47:47,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855530043] [2022-07-11 23:47:47,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:47,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:47:47,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:47,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:47:47,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:47,552 INFO L87 Difference]: Start difference. First operand 166 states and 260 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2022-07-11 23:47:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:47,579 INFO L93 Difference]: Finished difference Result 474 states and 748 transitions. [2022-07-11 23:47:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:47:47,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) Word has length 60 [2022-07-11 23:47:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:47,581 INFO L225 Difference]: With dead ends: 474 [2022-07-11 23:47:47,581 INFO L226 Difference]: Without dead ends: 318 [2022-07-11 23:47:47,582 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 [2022-07-11 23:47:47,584 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 127 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:47,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 314 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:47:47,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-11 23:47:47,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2022-07-11 23:47:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.5646687697160884) internal successors, (496), 317 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 496 transitions. [2022-07-11 23:47:47,602 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 496 transitions. Word has length 60 [2022-07-11 23:47:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:47,603 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 496 transitions. [2022-07-11 23:47:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 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) [2022-07-11 23:47:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 496 transitions. [2022-07-11 23:47:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-11 23:47:47,610 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:47,610 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:47,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 23:47:47,610 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1241103267, now seen corresponding path program 1 times [2022-07-11 23:47:47,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:47,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136712095] [2022-07-11 23:47:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:47,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 23:47:47,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:47,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136712095] [2022-07-11 23:47:47,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136712095] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:47,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:47,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:47:47,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005790317] [2022-07-11 23:47:47,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:47,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:47:47,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:47,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:47:47,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:47:47,766 INFO L87 Difference]: Start difference. First operand 318 states and 496 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:49,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:49,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:49,828 INFO L93 Difference]: Finished difference Result 625 states and 983 transitions. [2022-07-11 23:47:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:47:49,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 75 [2022-07-11 23:47:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:49,831 INFO L225 Difference]: With dead ends: 625 [2022-07-11 23:47:49,831 INFO L226 Difference]: Without dead ends: 469 [2022-07-11 23:47:49,831 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 [2022-07-11 23:47:49,831 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 128 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:49,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 467 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-11 23:47:49,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-07-11 23:47:49,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2022-07-11 23:47:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 1.561965811965812) internal successors, (731), 468 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 731 transitions. [2022-07-11 23:47:49,840 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 731 transitions. Word has length 75 [2022-07-11 23:47:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:49,840 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 731 transitions. [2022-07-11 23:47:49,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:49,841 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 731 transitions. [2022-07-11 23:47:49,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-11 23:47:49,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:49,842 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:49,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 23:47:49,842 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:49,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1310455098, now seen corresponding path program 1 times [2022-07-11 23:47:49,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:49,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897238980] [2022-07-11 23:47:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:49,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-11 23:47:49,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897238980] [2022-07-11 23:47:49,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897238980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:49,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:49,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:49,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123296958] [2022-07-11 23:47:49,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:49,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:49,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:49,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:49,995 INFO L87 Difference]: Start difference. First operand 469 states and 731 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:52,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:52,237 INFO L93 Difference]: Finished difference Result 1203 states and 1853 transitions. [2022-07-11 23:47:52,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:52,237 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 [2022-07-11 23:47:52,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:52,240 INFO L225 Difference]: With dead ends: 1203 [2022-07-11 23:47:52,240 INFO L226 Difference]: Without dead ends: 744 [2022-07-11 23:47:52,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:52,241 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 110 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:52,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 270 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:47:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-07-11 23:47:52,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 535. [2022-07-11 23:47:52,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.5767790262172285) internal successors, (842), 534 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:52,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 842 transitions. [2022-07-11 23:47:52,253 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 842 transitions. Word has length 93 [2022-07-11 23:47:52,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:52,253 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 842 transitions. [2022-07-11 23:47:52,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:52,254 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 842 transitions. [2022-07-11 23:47:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-11 23:47:52,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:52,255 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:52,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 23:47:52,255 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:52,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:52,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1810547741, now seen corresponding path program 1 times [2022-07-11 23:47:52,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:52,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152225752] [2022-07-11 23:47:52,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:52,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-11 23:47:52,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:52,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152225752] [2022-07-11 23:47:52,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152225752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:52,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:52,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:52,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954409800] [2022-07-11 23:47:52,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:52,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:52,422 INFO L87 Difference]: Start difference. First operand 535 states and 842 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) [2022-07-11 23:47:54,429 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:56,444 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:56,706 INFO L93 Difference]: Finished difference Result 1234 states and 1930 transitions. [2022-07-11 23:47:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) Word has length 94 [2022-07-11 23:47:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:56,709 INFO L225 Difference]: With dead ends: 1234 [2022-07-11 23:47:56,709 INFO L226 Difference]: Without dead ends: 709 [2022-07-11 23:47:56,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:56,710 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 89 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:56,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 550 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-11 23:47:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-07-11 23:47:56,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 583. [2022-07-11 23:47:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.5841924398625429) internal successors, (922), 582 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 922 transitions. [2022-07-11 23:47:56,719 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 922 transitions. Word has length 94 [2022-07-11 23:47:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:56,720 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 922 transitions. [2022-07-11 23:47:56,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) [2022-07-11 23:47:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 922 transitions. [2022-07-11 23:47:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-11 23:47:56,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:56,721 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:56,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-11 23:47:56,721 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash -556146853, now seen corresponding path program 1 times [2022-07-11 23:47:56,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:56,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399636377] [2022-07-11 23:47:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:56,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-11 23:47:56,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:56,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399636377] [2022-07-11 23:47:56,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399636377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:56,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:56,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:56,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873922132] [2022-07-11 23:47:56,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:56,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:56,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:56,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:56,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:56,886 INFO L87 Difference]: Start difference. First operand 583 states and 922 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) [2022-07-11 23:47:58,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:47:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:47:59,155 INFO L93 Difference]: Finished difference Result 1356 states and 2106 transitions. [2022-07-11 23:47:59,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:47:59,158 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) Word has length 94 [2022-07-11 23:47:59,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:47:59,160 INFO L225 Difference]: With dead ends: 1356 [2022-07-11 23:47:59,160 INFO L226 Difference]: Without dead ends: 783 [2022-07-11 23:47:59,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:47:59,162 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 109 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:47:59,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 282 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:47:59,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-07-11 23:47:59,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 535. [2022-07-11 23:47:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 1.5655430711610487) internal successors, (836), 534 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:47:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 836 transitions. [2022-07-11 23:47:59,178 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 836 transitions. Word has length 94 [2022-07-11 23:47:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:47:59,178 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 836 transitions. [2022-07-11 23:47:59,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 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) [2022-07-11 23:47:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 836 transitions. [2022-07-11 23:47:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-11 23:47:59,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:47:59,180 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:47:59,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 23:47:59,180 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:47:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:47:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2023275345, now seen corresponding path program 1 times [2022-07-11 23:47:59,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:47:59,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017964032] [2022-07-11 23:47:59,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:47:59,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:47:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:47:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-11 23:47:59,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:47:59,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017964032] [2022-07-11 23:47:59,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017964032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:47:59,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:47:59,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:47:59,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161343377] [2022-07-11 23:47:59,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:47:59,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:47:59,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:47:59,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:47:59,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:47:59,342 INFO L87 Difference]: Start difference. First operand 535 states and 836 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:01,355 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:03,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:03,667 INFO L93 Difference]: Finished difference Result 1234 states and 1916 transitions. [2022-07-11 23:48:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:03,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-11 23:48:03,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:03,672 INFO L225 Difference]: With dead ends: 1234 [2022-07-11 23:48:03,672 INFO L226 Difference]: Without dead ends: 709 [2022-07-11 23:48:03,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:03,673 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 75 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:03,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 548 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 231 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-11 23:48:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-07-11 23:48:03,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 609. [2022-07-11 23:48:03,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.582236842105263) internal successors, (962), 608 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:03,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 962 transitions. [2022-07-11 23:48:03,686 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 962 transitions. Word has length 109 [2022-07-11 23:48:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:03,686 INFO L495 AbstractCegarLoop]: Abstraction has 609 states and 962 transitions. [2022-07-11 23:48:03,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 962 transitions. [2022-07-11 23:48:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-11 23:48:03,688 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:03,688 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:03,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 23:48:03,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:03,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:03,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2139131827, now seen corresponding path program 1 times [2022-07-11 23:48:03,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:03,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348189982] [2022-07-11 23:48:03,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:03,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-11 23:48:03,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:03,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348189982] [2022-07-11 23:48:03,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348189982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:03,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:03,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:03,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953322240] [2022-07-11 23:48:03,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:03,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:03,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:03,867 INFO L87 Difference]: Start difference. First operand 609 states and 962 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:05,874 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:06,105 INFO L93 Difference]: Finished difference Result 1408 states and 2186 transitions. [2022-07-11 23:48:06,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:06,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-11 23:48:06,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:06,108 INFO L225 Difference]: With dead ends: 1408 [2022-07-11 23:48:06,108 INFO L226 Difference]: Without dead ends: 809 [2022-07-11 23:48:06,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:06,111 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 93 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:06,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 282 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:48:06,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-07-11 23:48:06,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 648. [2022-07-11 23:48:06,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 1.6027820710973726) internal successors, (1037), 647 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1037 transitions. [2022-07-11 23:48:06,125 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1037 transitions. Word has length 109 [2022-07-11 23:48:06,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:06,126 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 1037 transitions. [2022-07-11 23:48:06,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:06,126 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1037 transitions. [2022-07-11 23:48:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-11 23:48:06,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:06,129 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:06,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-11 23:48:06,129 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:06,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:06,130 INFO L85 PathProgramCache]: Analyzing trace with hash -61700687, now seen corresponding path program 1 times [2022-07-11 23:48:06,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:06,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685266] [2022-07-11 23:48:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:06,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-11 23:48:06,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:06,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685266] [2022-07-11 23:48:06,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685266] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:06,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:06,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:06,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604566006] [2022-07-11 23:48:06,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:06,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:06,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:06,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:06,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:06,308 INFO L87 Difference]: Start difference. First operand 648 states and 1037 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:08,316 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:08,536 INFO L93 Difference]: Finished difference Result 1567 states and 2462 transitions. [2022-07-11 23:48:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:08,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2022-07-11 23:48:08,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:08,539 INFO L225 Difference]: With dead ends: 1567 [2022-07-11 23:48:08,539 INFO L226 Difference]: Without dead ends: 929 [2022-07-11 23:48:08,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:08,540 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 94 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 36 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:08,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 284 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:48:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-07-11 23:48:08,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 688. [2022-07-11 23:48:08,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.6055312954876273) internal successors, (1103), 687 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1103 transitions. [2022-07-11 23:48:08,573 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1103 transitions. Word has length 109 [2022-07-11 23:48:08,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:08,574 INFO L495 AbstractCegarLoop]: Abstraction has 688 states and 1103 transitions. [2022-07-11 23:48:08,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1103 transitions. [2022-07-11 23:48:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-11 23:48:08,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:08,575 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:08,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 23:48:08,576 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:08,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1072258150, now seen corresponding path program 1 times [2022-07-11 23:48:08,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:08,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763412877] [2022-07-11 23:48:08,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:08,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-11 23:48:08,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:08,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763412877] [2022-07-11 23:48:08,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763412877] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:08,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:08,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:08,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721874614] [2022-07-11 23:48:08,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:08,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:08,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:08,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:08,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:08,715 INFO L87 Difference]: Start difference. First operand 688 states and 1103 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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) [2022-07-11 23:48:10,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:12,741 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:13,008 INFO L93 Difference]: Finished difference Result 1536 states and 2442 transitions. [2022-07-11 23:48:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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) Word has length 110 [2022-07-11 23:48:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:13,010 INFO L225 Difference]: With dead ends: 1536 [2022-07-11 23:48:13,011 INFO L226 Difference]: Without dead ends: 858 [2022-07-11 23:48:13,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:13,013 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 71 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:13,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 542 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-11 23:48:13,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-07-11 23:48:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 764. [2022-07-11 23:48:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 763 states have (on average 1.6133682830930538) internal successors, (1231), 763 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1231 transitions. [2022-07-11 23:48:13,025 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1231 transitions. Word has length 110 [2022-07-11 23:48:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:13,025 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1231 transitions. [2022-07-11 23:48:13,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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) [2022-07-11 23:48:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1231 transitions. [2022-07-11 23:48:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-11 23:48:13,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:13,027 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:13,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-11 23:48:13,027 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash 195821732, now seen corresponding path program 1 times [2022-07-11 23:48:13,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:13,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005860304] [2022-07-11 23:48:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:13,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-11 23:48:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:13,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005860304] [2022-07-11 23:48:13,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005860304] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:13,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:13,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:13,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310709357] [2022-07-11 23:48:13,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:13,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:13,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:13,150 INFO L87 Difference]: Start difference. First operand 764 states and 1231 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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) [2022-07-11 23:48:15,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:17,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:17,414 INFO L93 Difference]: Finished difference Result 1608 states and 2564 transitions. [2022-07-11 23:48:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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) Word has length 110 [2022-07-11 23:48:17,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:17,417 INFO L225 Difference]: With dead ends: 1608 [2022-07-11 23:48:17,417 INFO L226 Difference]: Without dead ends: 854 [2022-07-11 23:48:17,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:17,418 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 67 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:17,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 538 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:48:17,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-07-11 23:48:17,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 768. [2022-07-11 23:48:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 1.6101694915254237) internal successors, (1235), 767 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1235 transitions. [2022-07-11 23:48:17,431 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1235 transitions. Word has length 110 [2022-07-11 23:48:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:17,431 INFO L495 AbstractCegarLoop]: Abstraction has 768 states and 1235 transitions. [2022-07-11 23:48:17,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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) [2022-07-11 23:48:17,432 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1235 transitions. [2022-07-11 23:48:17,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-11 23:48:17,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:17,433 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:17,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 23:48:17,433 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:17,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:17,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1751530404, now seen corresponding path program 1 times [2022-07-11 23:48:17,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:17,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459368848] [2022-07-11 23:48:17,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:17,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 23:48:17,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:17,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459368848] [2022-07-11 23:48:17,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459368848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:17,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:17,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:17,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526342987] [2022-07-11 23:48:17,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:17,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:17,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:17,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:17,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:17,585 INFO L87 Difference]: Start difference. First operand 768 states and 1235 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2022-07-11 23:48:19,593 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:21,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:21,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:21,828 INFO L93 Difference]: Finished difference Result 1610 states and 2581 transitions. [2022-07-11 23:48:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:21,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) Word has length 110 [2022-07-11 23:48:21,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:21,831 INFO L225 Difference]: With dead ends: 1610 [2022-07-11 23:48:21,831 INFO L226 Difference]: Without dead ends: 852 [2022-07-11 23:48:21,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:21,832 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 38 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:21,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 496 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:48:21,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2022-07-11 23:48:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 808. [2022-07-11 23:48:21,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 1.614622057001239) internal successors, (1303), 807 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1303 transitions. [2022-07-11 23:48:21,846 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1303 transitions. Word has length 110 [2022-07-11 23:48:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:21,846 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1303 transitions. [2022-07-11 23:48:21,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 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) [2022-07-11 23:48:21,846 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1303 transitions. [2022-07-11 23:48:21,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-11 23:48:21,848 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:21,848 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:21,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-11 23:48:21,848 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1695019773, now seen corresponding path program 1 times [2022-07-11 23:48:21,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:21,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868750008] [2022-07-11 23:48:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:21,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:21,981 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-11 23:48:21,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:21,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868750008] [2022-07-11 23:48:21,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868750008] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:21,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:21,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:21,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430872105] [2022-07-11 23:48:21,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:21,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:21,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:21,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:21,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:21,983 INFO L87 Difference]: Start difference. First operand 808 states and 1303 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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) [2022-07-11 23:48:23,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:26,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:26,260 INFO L93 Difference]: Finished difference Result 1692 states and 2702 transitions. [2022-07-11 23:48:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:26,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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) Word has length 111 [2022-07-11 23:48:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:26,263 INFO L225 Difference]: With dead ends: 1692 [2022-07-11 23:48:26,263 INFO L226 Difference]: Without dead ends: 894 [2022-07-11 23:48:26,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:26,264 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 85 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:26,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 538 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-07-11 23:48:26,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-07-11 23:48:26,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 808. [2022-07-11 23:48:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 1.6121437422552665) internal successors, (1301), 807 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 1301 transitions. [2022-07-11 23:48:26,281 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 1301 transitions. Word has length 111 [2022-07-11 23:48:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:26,281 INFO L495 AbstractCegarLoop]: Abstraction has 808 states and 1301 transitions. [2022-07-11 23:48:26,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 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) [2022-07-11 23:48:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 1301 transitions. [2022-07-11 23:48:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-11 23:48:26,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:26,283 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:26,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-11 23:48:26,283 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1277623167, now seen corresponding path program 1 times [2022-07-11 23:48:26,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:26,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260502946] [2022-07-11 23:48:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:26,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-11 23:48:26,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:26,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260502946] [2022-07-11 23:48:26,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260502946] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:26,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:26,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:48:26,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636410268] [2022-07-11 23:48:26,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:26,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:48:26,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:26,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:48:26,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:48:26,402 INFO L87 Difference]: Start difference. First operand 808 states and 1301 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:28,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:28,450 INFO L93 Difference]: Finished difference Result 1607 states and 2596 transitions. [2022-07-11 23:48:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:48:28,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 111 [2022-07-11 23:48:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:28,453 INFO L225 Difference]: With dead ends: 1607 [2022-07-11 23:48:28,453 INFO L226 Difference]: Without dead ends: 1094 [2022-07-11 23:48:28,454 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 [2022-07-11 23:48:28,455 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 126 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:28,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 474 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 23:48:28,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-07-11 23:48:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1094. [2022-07-11 23:48:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 1.6120768526989937) internal successors, (1762), 1093 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1762 transitions. [2022-07-11 23:48:28,472 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1762 transitions. Word has length 111 [2022-07-11 23:48:28,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:28,472 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 1762 transitions. [2022-07-11 23:48:28,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:28,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1762 transitions. [2022-07-11 23:48:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-11 23:48:28,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:28,474 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:28,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-11 23:48:28,475 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1514033431, now seen corresponding path program 1 times [2022-07-11 23:48:28,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:28,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334216292] [2022-07-11 23:48:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:28,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:28,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:28,617 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-11 23:48:28,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:28,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334216292] [2022-07-11 23:48:28,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334216292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:28,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:28,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:48:28,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903316160] [2022-07-11 23:48:28,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:28,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:48:28,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:28,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:48:28,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:48:28,619 INFO L87 Difference]: Start difference. First operand 1094 states and 1762 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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) [2022-07-11 23:48:30,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:30,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:30,669 INFO L93 Difference]: Finished difference Result 2177 states and 3515 transitions. [2022-07-11 23:48:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:48:30,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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) Word has length 113 [2022-07-11 23:48:30,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:30,673 INFO L225 Difference]: With dead ends: 2177 [2022-07-11 23:48:30,673 INFO L226 Difference]: Without dead ends: 1378 [2022-07-11 23:48:30,674 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 [2022-07-11 23:48:30,674 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 126 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:30,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 472 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 23:48:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-07-11 23:48:30,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1378. [2022-07-11 23:48:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1378 states, 1377 states have (on average 1.6122004357298474) internal successors, (2220), 1377 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1378 states to 1378 states and 2220 transitions. [2022-07-11 23:48:30,695 INFO L78 Accepts]: Start accepts. Automaton has 1378 states and 2220 transitions. Word has length 113 [2022-07-11 23:48:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:30,695 INFO L495 AbstractCegarLoop]: Abstraction has 1378 states and 2220 transitions. [2022-07-11 23:48:30,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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) [2022-07-11 23:48:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1378 states and 2220 transitions. [2022-07-11 23:48:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-07-11 23:48:30,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:30,697 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:30,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-11 23:48:30,698 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1373484821, now seen corresponding path program 1 times [2022-07-11 23:48:30,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:30,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66582142] [2022-07-11 23:48:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:30,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:48:30,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:30,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66582142] [2022-07-11 23:48:30,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66582142] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:30,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:30,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:48:30,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457514266] [2022-07-11 23:48:30,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:48:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:48:30,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:48:30,842 INFO L87 Difference]: Start difference. First operand 1378 states and 2220 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:32,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:32,892 INFO L93 Difference]: Finished difference Result 2722 states and 4392 transitions. [2022-07-11 23:48:32,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:48:32,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 [2022-07-11 23:48:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:32,896 INFO L225 Difference]: With dead ends: 2722 [2022-07-11 23:48:32,896 INFO L226 Difference]: Without dead ends: 1639 [2022-07-11 23:48:32,897 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 [2022-07-11 23:48:32,898 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 130 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:32,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 473 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-07-11 23:48:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2022-07-11 23:48:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1639. [2022-07-11 23:48:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.6111111111111112) internal successors, (2639), 1638 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2639 transitions. [2022-07-11 23:48:32,919 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2639 transitions. Word has length 113 [2022-07-11 23:48:32,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:32,920 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2639 transitions. [2022-07-11 23:48:32,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:32,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2639 transitions. [2022-07-11 23:48:32,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-07-11 23:48:32,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:32,923 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:32,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-11 23:48:32,923 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:32,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash -881311456, now seen corresponding path program 1 times [2022-07-11 23:48:32,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:32,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669788871] [2022-07-11 23:48:32,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:32,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:33,046 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-11 23:48:33,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:33,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669788871] [2022-07-11 23:48:33,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669788871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:33,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:33,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:33,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827922929] [2022-07-11 23:48:33,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:33,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:33,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:33,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:33,048 INFO L87 Difference]: Start difference. First operand 1639 states and 2639 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:35,061 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:37,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:37,294 INFO L93 Difference]: Finished difference Result 3393 states and 5411 transitions. [2022-07-11 23:48:37,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:37,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 177 [2022-07-11 23:48:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:37,299 INFO L225 Difference]: With dead ends: 3393 [2022-07-11 23:48:37,300 INFO L226 Difference]: Without dead ends: 1764 [2022-07-11 23:48:37,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:37,302 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 44 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:37,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 507 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 156 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:48:37,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-07-11 23:48:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1639. [2022-07-11 23:48:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.6080586080586081) internal successors, (2634), 1638 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2634 transitions. [2022-07-11 23:48:37,326 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2634 transitions. Word has length 177 [2022-07-11 23:48:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:37,326 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2634 transitions. [2022-07-11 23:48:37,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:37,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2634 transitions. [2022-07-11 23:48:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-11 23:48:37,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:37,331 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:37,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-11 23:48:37,331 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:37,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:37,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1122935132, now seen corresponding path program 2 times [2022-07-11 23:48:37,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:37,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724860433] [2022-07-11 23:48:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:37,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-11 23:48:37,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:37,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724860433] [2022-07-11 23:48:37,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724860433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:37,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:37,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:37,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896735291] [2022-07-11 23:48:37,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:37,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:37,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:37,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:37,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:37,476 INFO L87 Difference]: Start difference. First operand 1639 states and 2634 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:39,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:41,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:41,747 INFO L93 Difference]: Finished difference Result 3578 states and 5633 transitions. [2022-07-11 23:48:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:41,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-11 23:48:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:41,755 INFO L225 Difference]: With dead ends: 3578 [2022-07-11 23:48:41,755 INFO L226 Difference]: Without dead ends: 1949 [2022-07-11 23:48:41,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:41,758 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 110 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:41,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 300 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:48:41,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1949 states. [2022-07-11 23:48:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1949 to 1639. [2022-07-11 23:48:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.5879120879120878) internal successors, (2601), 1638 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:41,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2601 transitions. [2022-07-11 23:48:41,788 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2601 transitions. Word has length 192 [2022-07-11 23:48:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:41,788 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2601 transitions. [2022-07-11 23:48:41,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:41,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2601 transitions. [2022-07-11 23:48:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-11 23:48:41,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:41,791 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:41,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 23:48:41,792 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash -670431110, now seen corresponding path program 1 times [2022-07-11 23:48:41,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:41,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125575341] [2022-07-11 23:48:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:41,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-11 23:48:41,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:41,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125575341] [2022-07-11 23:48:41,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125575341] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:41,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:41,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469522499] [2022-07-11 23:48:41,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:41,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:41,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:41,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:41,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:41,932 INFO L87 Difference]: Start difference. First operand 1639 states and 2601 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:43,939 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:45,960 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:46,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:46,154 INFO L93 Difference]: Finished difference Result 3388 states and 5330 transitions. [2022-07-11 23:48:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-11 23:48:46,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:46,159 INFO L225 Difference]: With dead ends: 3388 [2022-07-11 23:48:46,159 INFO L226 Difference]: Without dead ends: 1759 [2022-07-11 23:48:46,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:46,162 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 54 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:46,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 505 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 151 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:48:46,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2022-07-11 23:48:46,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1639. [2022-07-11 23:48:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 1.5848595848595848) internal successors, (2596), 1638 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:46,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 2596 transitions. [2022-07-11 23:48:46,189 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 2596 transitions. Word has length 192 [2022-07-11 23:48:46,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:46,190 INFO L495 AbstractCegarLoop]: Abstraction has 1639 states and 2596 transitions. [2022-07-11 23:48:46,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 2596 transitions. [2022-07-11 23:48:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-11 23:48:46,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:46,193 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:46,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-11 23:48:46,193 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:46,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:46,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1025877347, now seen corresponding path program 1 times [2022-07-11 23:48:46,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:46,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423602645] [2022-07-11 23:48:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:46,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-11 23:48:46,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:46,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423602645] [2022-07-11 23:48:46,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423602645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:46,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:46,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:46,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525143042] [2022-07-11 23:48:46,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:46,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:46,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:46,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:46,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:46,328 INFO L87 Difference]: Start difference. First operand 1639 states and 2596 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:48,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:50,357 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:50,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:50,564 INFO L93 Difference]: Finished difference Result 3151 states and 4971 transitions. [2022-07-11 23:48:50,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:50,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-11 23:48:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:50,570 INFO L225 Difference]: With dead ends: 3151 [2022-07-11 23:48:50,570 INFO L226 Difference]: Without dead ends: 1807 [2022-07-11 23:48:50,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:50,590 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 30 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:50,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 474 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 132 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:48:50,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2022-07-11 23:48:50,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1729. [2022-07-11 23:48:50,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.5862268518518519) internal successors, (2741), 1728 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2741 transitions. [2022-07-11 23:48:50,636 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2741 transitions. Word has length 192 [2022-07-11 23:48:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:50,636 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2741 transitions. [2022-07-11 23:48:50,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2741 transitions. [2022-07-11 23:48:50,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-11 23:48:50,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:50,640 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:50,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-11 23:48:50,640 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:50,641 INFO L85 PathProgramCache]: Analyzing trace with hash 414977075, now seen corresponding path program 1 times [2022-07-11 23:48:50,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:50,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147171054] [2022-07-11 23:48:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:50,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:50,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-11 23:48:50,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:50,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147171054] [2022-07-11 23:48:50,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147171054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:50,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:50,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:50,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669771390] [2022-07-11 23:48:50,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:50,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:50,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:50,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:50,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:50,800 INFO L87 Difference]: Start difference. First operand 1729 states and 2741 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:52,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:53,065 INFO L93 Difference]: Finished difference Result 3759 states and 5848 transitions. [2022-07-11 23:48:53,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:53,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2022-07-11 23:48:53,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:53,071 INFO L225 Difference]: With dead ends: 3759 [2022-07-11 23:48:53,072 INFO L226 Difference]: Without dead ends: 2040 [2022-07-11 23:48:53,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:53,078 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 116 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:53,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 304 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:48:53,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2022-07-11 23:48:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1729. [2022-07-11 23:48:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.5642361111111112) internal successors, (2703), 1728 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2703 transitions. [2022-07-11 23:48:53,108 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2703 transitions. Word has length 193 [2022-07-11 23:48:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:53,108 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2703 transitions. [2022-07-11 23:48:53,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2703 transitions. [2022-07-11 23:48:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-11 23:48:53,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:53,112 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:53,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-11 23:48:53,112 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:53,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1213611809, now seen corresponding path program 1 times [2022-07-11 23:48:53,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:53,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582430638] [2022-07-11 23:48:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:53,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:53,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 251 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-11 23:48:53,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:53,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582430638] [2022-07-11 23:48:53,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582430638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:53,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:53,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:53,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745859677] [2022-07-11 23:48:53,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:53,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:53,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:53,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:53,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:53,252 INFO L87 Difference]: Start difference. First operand 1729 states and 2703 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 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) [2022-07-11 23:48:55,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:55,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:55,518 INFO L93 Difference]: Finished difference Result 3759 states and 5772 transitions. [2022-07-11 23:48:55,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:55,519 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 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) Word has length 194 [2022-07-11 23:48:55,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:55,542 INFO L225 Difference]: With dead ends: 3759 [2022-07-11 23:48:55,548 INFO L226 Difference]: Without dead ends: 2040 [2022-07-11 23:48:55,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:55,553 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 114 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:55,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 282 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:48:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2022-07-11 23:48:55,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1729. [2022-07-11 23:48:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.5422453703703705) internal successors, (2665), 1728 states have internal predecessors, (2665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2665 transitions. [2022-07-11 23:48:55,588 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2665 transitions. Word has length 194 [2022-07-11 23:48:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:55,588 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2665 transitions. [2022-07-11 23:48:55,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 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) [2022-07-11 23:48:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2665 transitions. [2022-07-11 23:48:55,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-11 23:48:55,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:55,592 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:55,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-11 23:48:55,592 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1076763912, now seen corresponding path program 1 times [2022-07-11 23:48:55,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:55,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474475330] [2022-07-11 23:48:55,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:55,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 258 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-07-11 23:48:55,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:55,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474475330] [2022-07-11 23:48:55,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474475330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:48:55,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:48:55,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:48:55,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278561508] [2022-07-11 23:48:55,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:48:55,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:48:55,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:48:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:48:55,760 INFO L87 Difference]: Start difference. First operand 1729 states and 2665 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 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) [2022-07-11 23:48:57,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:48:58,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:48:58,064 INFO L93 Difference]: Finished difference Result 3759 states and 5696 transitions. [2022-07-11 23:48:58,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:48:58,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 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 195 [2022-07-11 23:48:58,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:48:58,075 INFO L225 Difference]: With dead ends: 3759 [2022-07-11 23:48:58,076 INFO L226 Difference]: Without dead ends: 2040 [2022-07-11 23:48:58,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:48:58,078 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 112 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:48:58,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 282 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:48:58,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2022-07-11 23:48:58,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1729. [2022-07-11 23:48:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1728 states have (on average 1.5202546296296295) internal successors, (2627), 1728 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:48:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 2627 transitions. [2022-07-11 23:48:58,102 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 2627 transitions. Word has length 195 [2022-07-11 23:48:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:48:58,102 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 2627 transitions. [2022-07-11 23:48:58,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 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) [2022-07-11 23:48:58,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 2627 transitions. [2022-07-11 23:48:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-11 23:48:58,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:48:58,108 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:48:58,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-11 23:48:58,108 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:48:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:48:58,109 INFO L85 PathProgramCache]: Analyzing trace with hash 569210709, now seen corresponding path program 1 times [2022-07-11 23:48:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:48:58,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768417417] [2022-07-11 23:48:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:58,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:48:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 301 proven. 1 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-07-11 23:48:58,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:48:58,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768417417] [2022-07-11 23:48:58,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768417417] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:48:58,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967095841] [2022-07-11 23:48:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:48:58,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:48:58,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:48:58,296 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:48:58,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:48:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:48:59,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-11 23:48:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:48:59,280 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-11 23:48:59,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-11 23:48:59,286 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 123 treesize of output 63 [2022-07-11 23:48:59,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-11 23:48:59,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-11 23:48:59,436 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-11 23:48:59,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 21 [2022-07-11 23:48:59,465 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 7 treesize of output 3 [2022-07-11 23:48:59,485 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:48:59,486 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 19 treesize of output 7 [2022-07-11 23:48:59,504 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:48:59,504 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 1 case distinctions, treesize of input 18 treesize of output 19 [2022-07-11 23:48:59,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 23:48:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 267 proven. 40 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-11 23:48:59,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:48:59,583 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 10 treesize of output 4 [2022-07-11 23:48:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 273 proven. 15 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-11 23:48:59,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967095841] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:48:59,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:48:59,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 13 [2022-07-11 23:48:59,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066801695] [2022-07-11 23:48:59,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:48:59,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 23:48:59,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:48:59,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 23:48:59,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:48:59,627 INFO L87 Difference]: Start difference. First operand 1729 states and 2627 transitions. Second operand has 13 states, 13 states have (on average 14.461538461538462) internal successors, (188), 13 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:01,639 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:03,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:05,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:07,698 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:09,714 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:11,732 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:13,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:15,722 INFO L93 Difference]: Finished difference Result 6090 states and 8963 transitions. [2022-07-11 23:49:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-11 23:49:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 14.461538461538462) internal successors, (188), 13 states have internal predecessors, (188), 0 states have call successors, (0), 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 195 [2022-07-11 23:49:15,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:15,729 INFO L225 Difference]: With dead ends: 6090 [2022-07-11 23:49:15,729 INFO L226 Difference]: Without dead ends: 4371 [2022-07-11 23:49:15,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2022-07-11 23:49:15,734 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 786 mSDsluCounter, 2053 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 227 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 2298 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:15,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 2298 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1891 Invalid, 7 Unknown, 0 Unchecked, 15.7s Time] [2022-07-11 23:49:15,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-07-11 23:49:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 2818. [2022-07-11 23:49:15,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2818 states, 2817 states have (on average 1.511537096201633) internal successors, (4258), 2817 states have internal predecessors, (4258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2818 states to 2818 states and 4258 transitions. [2022-07-11 23:49:15,815 INFO L78 Accepts]: Start accepts. Automaton has 2818 states and 4258 transitions. Word has length 195 [2022-07-11 23:49:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:15,815 INFO L495 AbstractCegarLoop]: Abstraction has 2818 states and 4258 transitions. [2022-07-11 23:49:15,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 14.461538461538462) internal successors, (188), 13 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:15,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2818 states and 4258 transitions. [2022-07-11 23:49:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-11 23:49:15,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:15,819 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:15,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-11 23:49:16,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-11 23:49:16,036 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1310571081, now seen corresponding path program 1 times [2022-07-11 23:49:16,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:16,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556989338] [2022-07-11 23:49:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:16,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 256 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-11 23:49:16,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:16,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556989338] [2022-07-11 23:49:16,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556989338] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:16,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:16,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:49:16,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438228594] [2022-07-11 23:49:16,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:16,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:49:16,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:16,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:49:16,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:49:16,176 INFO L87 Difference]: Start difference. First operand 2818 states and 4258 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:18,183 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:20,201 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:20,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:20,416 INFO L93 Difference]: Finished difference Result 5694 states and 8522 transitions. [2022-07-11 23:49:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:49:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 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 195 [2022-07-11 23:49:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:20,422 INFO L225 Difference]: With dead ends: 5694 [2022-07-11 23:49:20,422 INFO L226 Difference]: Without dead ends: 2886 [2022-07-11 23:49:20,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:49:20,425 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 38 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:20,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 487 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:49:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2886 states. [2022-07-11 23:49:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2886 to 2676. [2022-07-11 23:49:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 1.503177570093458) internal successors, (4021), 2675 states have internal predecessors, (4021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 4021 transitions. [2022-07-11 23:49:20,468 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 4021 transitions. Word has length 195 [2022-07-11 23:49:20,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:20,469 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 4021 transitions. [2022-07-11 23:49:20,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:20,470 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 4021 transitions. [2022-07-11 23:49:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-11 23:49:20,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:20,473 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:20,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-11 23:49:20,473 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:20,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1625501241, now seen corresponding path program 1 times [2022-07-11 23:49:20,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:20,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949564639] [2022-07-11 23:49:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:20,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 245 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-07-11 23:49:20,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:20,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949564639] [2022-07-11 23:49:20,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949564639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:20,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:20,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:49:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475122049] [2022-07-11 23:49:20,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:20,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:49:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:49:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:49:20,649 INFO L87 Difference]: Start difference. First operand 2676 states and 4021 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 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) [2022-07-11 23:49:22,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:22,979 INFO L93 Difference]: Finished difference Result 5812 states and 8604 transitions. [2022-07-11 23:49:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:49:22,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 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) Word has length 197 [2022-07-11 23:49:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:22,983 INFO L225 Difference]: With dead ends: 5812 [2022-07-11 23:49:22,983 INFO L226 Difference]: Without dead ends: 3146 [2022-07-11 23:49:22,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:49:22,985 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 106 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:22,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 282 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:49:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-07-11 23:49:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2676. [2022-07-11 23:49:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 1.486355140186916) internal successors, (3976), 2675 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 3976 transitions. [2022-07-11 23:49:23,029 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 3976 transitions. Word has length 197 [2022-07-11 23:49:23,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:23,029 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 3976 transitions. [2022-07-11 23:49:23,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 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) [2022-07-11 23:49:23,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 3976 transitions. [2022-07-11 23:49:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-11 23:49:23,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:23,033 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:23,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-11 23:49:23,033 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:23,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:23,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1584226853, now seen corresponding path program 1 times [2022-07-11 23:49:23,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:23,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31501171] [2022-07-11 23:49:23,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:23,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-07-11 23:49:23,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31501171] [2022-07-11 23:49:23,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31501171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:23,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:23,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:49:23,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604952624] [2022-07-11 23:49:23,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:23,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:49:23,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:23,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:49:23,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:49:23,243 INFO L87 Difference]: Start difference. First operand 2676 states and 3976 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2022-07-11 23:49:25,250 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:25,556 INFO L93 Difference]: Finished difference Result 5812 states and 8514 transitions. [2022-07-11 23:49:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:49:25,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) Word has length 199 [2022-07-11 23:49:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:25,560 INFO L225 Difference]: With dead ends: 5812 [2022-07-11 23:49:25,561 INFO L226 Difference]: Without dead ends: 3146 [2022-07-11 23:49:25,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:49:25,562 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 89 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:25,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 282 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:49:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-07-11 23:49:25,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2676. [2022-07-11 23:49:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2675 states have (on average 1.4826168224299066) internal successors, (3966), 2675 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 3966 transitions. [2022-07-11 23:49:25,606 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 3966 transitions. Word has length 199 [2022-07-11 23:49:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:25,606 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 3966 transitions. [2022-07-11 23:49:25,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2022-07-11 23:49:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 3966 transitions. [2022-07-11 23:49:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-11 23:49:25,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:25,609 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:25,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-11 23:49:25,610 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:25,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:25,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1834304025, now seen corresponding path program 1 times [2022-07-11 23:49:25,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:25,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846377425] [2022-07-11 23:49:25,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:25,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-07-11 23:49:25,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:25,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846377425] [2022-07-11 23:49:25,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846377425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:25,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:25,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:49:25,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842510176] [2022-07-11 23:49:25,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:25,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:49:25,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:25,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:49:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:49:25,795 INFO L87 Difference]: Start difference. First operand 2676 states and 3966 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2022-07-11 23:49:27,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:29,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:30,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:30,079 INFO L93 Difference]: Finished difference Result 5760 states and 8478 transitions. [2022-07-11 23:49:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:49:30,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) Word has length 199 [2022-07-11 23:49:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:30,086 INFO L225 Difference]: With dead ends: 5760 [2022-07-11 23:49:30,086 INFO L226 Difference]: Without dead ends: 3094 [2022-07-11 23:49:30,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:49:30,089 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 41 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:30,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 498 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 170 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:49:30,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3094 states. [2022-07-11 23:49:30,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3094 to 2908. [2022-07-11 23:49:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2907 states have (on average 1.477124183006536) internal successors, (4294), 2907 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 4294 transitions. [2022-07-11 23:49:30,146 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 4294 transitions. Word has length 199 [2022-07-11 23:49:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:30,146 INFO L495 AbstractCegarLoop]: Abstraction has 2908 states and 4294 transitions. [2022-07-11 23:49:30,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2022-07-11 23:49:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 4294 transitions. [2022-07-11 23:49:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-11 23:49:30,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:30,150 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:30,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-11 23:49:30,151 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:30,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:30,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1781391017, now seen corresponding path program 1 times [2022-07-11 23:49:30,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:30,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178472869] [2022-07-11 23:49:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:30,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 217 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-07-11 23:49:30,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:30,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178472869] [2022-07-11 23:49:30,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178472869] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:30,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:30,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:49:30,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374232793] [2022-07-11 23:49:30,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:30,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:49:30,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:30,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:49:30,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:49:30,372 INFO L87 Difference]: Start difference. First operand 2908 states and 4294 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2022-07-11 23:49:32,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:34,404 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:34,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:34,659 INFO L93 Difference]: Finished difference Result 6383 states and 9374 transitions. [2022-07-11 23:49:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:49:34,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) Word has length 199 [2022-07-11 23:49:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:34,664 INFO L225 Difference]: With dead ends: 6383 [2022-07-11 23:49:34,664 INFO L226 Difference]: Without dead ends: 3485 [2022-07-11 23:49:34,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:49:34,667 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 47 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 7 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:34,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 510 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 184 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2022-07-11 23:49:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3485 states. [2022-07-11 23:49:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3485 to 3228. [2022-07-11 23:49:34,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 1.4793926247288502) internal successors, (4774), 3227 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 4774 transitions. [2022-07-11 23:49:34,746 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 4774 transitions. Word has length 199 [2022-07-11 23:49:34,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:34,746 INFO L495 AbstractCegarLoop]: Abstraction has 3228 states and 4774 transitions. [2022-07-11 23:49:34,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 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) [2022-07-11 23:49:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 4774 transitions. [2022-07-11 23:49:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-07-11 23:49:34,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:34,750 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:34,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-11 23:49:34,751 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:34,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1088911914, now seen corresponding path program 1 times [2022-07-11 23:49:34,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:34,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753794193] [2022-07-11 23:49:34,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:34,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 328 proven. 60 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-07-11 23:49:35,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:35,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753794193] [2022-07-11 23:49:35,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753794193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:49:35,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207594931] [2022-07-11 23:49:35,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:35,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:49:35,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:49:35,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:49:35,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:49:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:36,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 23:49:36,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:49:36,215 INFO L356 Elim1Store]: treesize reduction 54, result has 44.3 percent of original size [2022-07-11 23:49:36,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 143 [2022-07-11 23:49:36,219 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 123 treesize of output 63 [2022-07-11 23:49:36,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-11 23:49:36,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 9 [2022-07-11 23:49:36,327 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-07-11 23:49:36,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 21 [2022-07-11 23:49:36,336 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 7 treesize of output 3 [2022-07-11 23:49:36,366 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 7 treesize of output 3 [2022-07-11 23:49:36,390 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 23:49:36,390 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 19 treesize of output 7 [2022-07-11 23:49:36,403 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 13 treesize of output 9 [2022-07-11 23:49:36,421 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 23:49:36,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-11 23:49:36,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-11 23:49:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 309 proven. 60 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-07-11 23:49:36,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:49:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 316 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-07-11 23:49:36,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207594931] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-11 23:49:36,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:49:36,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 11 [2022-07-11 23:49:36,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425223407] [2022-07-11 23:49:36,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:36,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:49:36,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:36,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:49:36,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:49:36,499 INFO L87 Difference]: Start difference. First operand 3228 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 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) [2022-07-11 23:49:38,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:38,825 INFO L93 Difference]: Finished difference Result 7613 states and 11205 transitions. [2022-07-11 23:49:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:49:38,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 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 200 [2022-07-11 23:49:38,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:38,831 INFO L225 Difference]: With dead ends: 7613 [2022-07-11 23:49:38,831 INFO L226 Difference]: Without dead ends: 4395 [2022-07-11 23:49:38,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-11 23:49:38,834 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 96 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:38,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 510 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:49:38,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2022-07-11 23:49:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 3628. [2022-07-11 23:49:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 1.4656741108354012) internal successors, (5316), 3627 states have internal predecessors, (5316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 5316 transitions. [2022-07-11 23:49:38,897 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 5316 transitions. Word has length 200 [2022-07-11 23:49:38,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:38,897 INFO L495 AbstractCegarLoop]: Abstraction has 3628 states and 5316 transitions. [2022-07-11 23:49:38,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 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) [2022-07-11 23:49:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 5316 transitions. [2022-07-11 23:49:38,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-07-11 23:49:38,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:38,902 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:38,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-11 23:49:39,116 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,SelfDestructingSolverStorable31 [2022-07-11 23:49:39,116 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:39,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:39,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1477348565, now seen corresponding path program 1 times [2022-07-11 23:49:39,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:39,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204522418] [2022-07-11 23:49:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:39,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 265 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-07-11 23:49:39,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:39,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204522418] [2022-07-11 23:49:39,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204522418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:39,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:39,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:49:39,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211945407] [2022-07-11 23:49:39,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:39,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:49:39,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:39,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:49:39,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:49:39,315 INFO L87 Difference]: Start difference. First operand 3628 states and 5316 transitions. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:41,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:41,652 INFO L93 Difference]: Finished difference Result 7347 states and 10667 transitions. [2022-07-11 23:49:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:49:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 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 214 [2022-07-11 23:49:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:41,658 INFO L225 Difference]: With dead ends: 7347 [2022-07-11 23:49:41,658 INFO L226 Difference]: Without dead ends: 3729 [2022-07-11 23:49:41,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:49:41,662 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 113 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:41,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 278 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-11 23:49:41,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2022-07-11 23:49:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3309. [2022-07-11 23:49:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 1.4410519951632406) internal successors, (4767), 3308 states have internal predecessors, (4767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 4767 transitions. [2022-07-11 23:49:41,723 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 4767 transitions. Word has length 214 [2022-07-11 23:49:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:41,724 INFO L495 AbstractCegarLoop]: Abstraction has 3309 states and 4767 transitions. [2022-07-11 23:49:41,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:41,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 4767 transitions. [2022-07-11 23:49:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-11 23:49:41,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:41,728 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:41,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-11 23:49:41,729 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:41,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:41,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1035956472, now seen corresponding path program 1 times [2022-07-11 23:49:41,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:41,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207750607] [2022-07-11 23:49:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:41,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-07-11 23:49:41,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:41,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207750607] [2022-07-11 23:49:41,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207750607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:49:41,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:49:41,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:49:41,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850619396] [2022-07-11 23:49:41,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:49:41,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:49:41,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:49:41,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:49:41,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:49:41,948 INFO L87 Difference]: Start difference. First operand 3309 states and 4767 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:43,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-11 23:49:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:49:44,272 INFO L93 Difference]: Finished difference Result 7020 states and 10027 transitions. [2022-07-11 23:49:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:49:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2022-07-11 23:49:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:49:44,276 INFO L225 Difference]: With dead ends: 7020 [2022-07-11 23:49:44,276 INFO L226 Difference]: Without dead ends: 3721 [2022-07-11 23:49:44,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:49:44,279 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 105 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:49:44,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 284 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-07-11 23:49:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3721 states. [2022-07-11 23:49:44,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3721 to 3309. [2022-07-11 23:49:44,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 1.4168681983071343) internal successors, (4687), 3308 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:44,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 4687 transitions. [2022-07-11 23:49:44,336 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 4687 transitions. Word has length 219 [2022-07-11 23:49:44,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:49:44,336 INFO L495 AbstractCegarLoop]: Abstraction has 3309 states and 4687 transitions. [2022-07-11 23:49:44,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 23:49:44,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 4687 transitions. [2022-07-11 23:49:44,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-07-11 23:49:44,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:49:44,341 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:49:44,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-11 23:49:44,341 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:49:44,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:49:44,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1993742684, now seen corresponding path program 1 times [2022-07-11 23:49:44,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:49:44,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39144111] [2022-07-11 23:49:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:44,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:49:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 2 proven. 282 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-07-11 23:49:46,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:49:46,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39144111] [2022-07-11 23:49:46,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39144111] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:49:46,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302604247] [2022-07-11 23:49:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:49:46,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:49:46,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:49:46,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:49:46,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:49:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:49:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 309 conjunts are in the unsatisfiable core [2022-07-11 23:49:47,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:49:47,997 INFO L190 IndexEqualityManager]: detected not equals via solver