./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-2.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 46dd66c9a206199cd5bc220ec6fbc33cff9c3bf85e99aafe68b123163a041adf --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:21:45,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:21:45,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:21:45,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:21:45,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:21:45,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:21:45,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:21:45,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:21:45,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:21:45,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:21:45,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:21:45,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:21:45,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:21:45,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:21:45,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:21:45,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:21:45,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:21:45,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:21:45,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:21:45,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:21:45,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:21:45,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:21:45,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:21:45,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:21:45,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:21:45,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:21:45,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:21:45,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:21:45,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:21:45,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:21:45,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:21:45,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:21:45,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:21:45,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:21:45,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:21:45,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:21:45,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:21:45,430 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:21:45,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:21:45,431 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:21:45,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:21:45,432 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:21:45,456 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:21:45,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:21:45,457 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:21:45,457 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:21:45,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:21:45,457 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:21:45,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:21:45,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:21:45,458 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:21:45,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:21:45,459 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:21:45,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:21:45,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:21:45,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:21:45,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:21:45,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:21:45,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:21:45,460 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:21:45,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:21:45,460 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:21:45,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:21:45,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:21:45,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:21:45,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:21:45,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:21:45,461 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:21:45,461 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:21:45,461 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:21:45,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:21:45,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:21:45,462 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:21:45,462 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:21:45,462 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:21:45,462 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:21:45,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46dd66c9a206199cd5bc220ec6fbc33cff9c3bf85e99aafe68b123163a041adf [2021-12-21 10:21:45,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:21:45,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:21:45,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:21:45,675 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:21:45,675 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:21:45,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-2.c [2021-12-21 10:21:45,744 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16aa7fabc/a1bb2304eb124e8493c2130f745b5ddb/FLAGa56f9b60d [2021-12-21 10:21:46,104 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:21:46,104 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_clnt.blast.04.i.cil-2.c [2021-12-21 10:21:46,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16aa7fabc/a1bb2304eb124e8493c2130f745b5ddb/FLAGa56f9b60d [2021-12-21 10:21:46,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/16aa7fabc/a1bb2304eb124e8493c2130f745b5ddb [2021-12-21 10:21:46,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:21:46,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:21:46,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:21:46,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:21:46,480 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:21:46,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:46,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f07db7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46, skipping insertion in model container [2021-12-21 10:21:46,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:46,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:21:46,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:21:46,816 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.04.i.cil-2.c[65405,65418] [2021-12-21 10:21:46,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:21:46,829 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:21:46,897 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.04.i.cil-2.c[65405,65418] [2021-12-21 10:21:46,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:21:46,909 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:21:46,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46 WrapperNode [2021-12-21 10:21:46,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:21:46,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:21:46,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:21:46,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:21:46,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:46,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:46,982 INFO L137 Inliner]: procedures = 31, calls = 217, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 718 [2021-12-21 10:21:46,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:21:46,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:21:46,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:21:46,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:21:46,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:46,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:47,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:47,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:47,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:47,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:47,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:47,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:21:47,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:21:47,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:21:47,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:21:47,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (1/1) ... [2021-12-21 10:21:47,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:21:47,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:21:47,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 10:21:47,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 10:21:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:21:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 10:21:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 10:21:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 10:21:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 10:21:47,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:21:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 10:21:47,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:21:47,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:21:47,255 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:21:47,256 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:21:47,265 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-21 10:21:49,887 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-12-21 10:21:49,887 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-12-21 10:21:49,887 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:21:49,892 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:21:49,892 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:21:49,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:21:49 BoogieIcfgContainer [2021-12-21 10:21:49,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:21:49,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:21:49,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:21:49,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:21:49,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:21:46" (1/3) ... [2021-12-21 10:21:49,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd0b60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:21:49, skipping insertion in model container [2021-12-21 10:21:49,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:21:46" (2/3) ... [2021-12-21 10:21:49,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd0b60f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:21:49, skipping insertion in model container [2021-12-21 10:21:49,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:21:49" (3/3) ... [2021-12-21 10:21:49,899 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt.blast.04.i.cil-2.c [2021-12-21 10:21:49,902 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:21:49,903 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:21:49,931 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:21:49,935 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:21:49,935 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:21:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:21:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-21 10:21:49,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:49,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:21:49,951 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1457695037, now seen corresponding path program 1 times [2021-12-21 10:21:49,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:49,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114423713] [2021-12-21 10:21:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:49,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:50,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:50,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:50,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114423713] [2021-12-21 10:21:50,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114423713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:50,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:50,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:21:50,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248058627] [2021-12-21 10:21:50,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:50,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:21:50,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:21:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:21:50,437 INFO L87 Difference]: Start difference. First operand has 129 states, 127 states have (on average 1.7086614173228347) internal successors, (217), 128 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-12-21 10:21:52,465 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 [] [2021-12-21 10:21:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:52,759 INFO L93 Difference]: Finished difference Result 360 states and 608 transitions. [2021-12-21 10:21:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:21:52,761 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 [2021-12-21 10:21:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:52,767 INFO L225 Difference]: With dead ends: 360 [2021-12-21 10:21:52,768 INFO L226 Difference]: Without dead ends: 205 [2021-12-21 10:21:52,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:21:52,771 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 143 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 45 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:52,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 378 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 235 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 10:21:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-21 10:21:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-12-21 10:21:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.5629629629629629) internal successors, (211), 135 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:21:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 211 transitions. [2021-12-21 10:21:52,798 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 211 transitions. Word has length 24 [2021-12-21 10:21:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:52,799 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 211 transitions. [2021-12-21 10:21:52,799 INFO L471 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) [2021-12-21 10:21:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 211 transitions. [2021-12-21 10:21:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 10:21:52,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:52,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:21:52,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:21:52,800 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2051408280, now seen corresponding path program 1 times [2021-12-21 10:21:52,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:52,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431003976] [2021-12-21 10:21:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:52,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:53,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:53,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431003976] [2021-12-21 10:21:53,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431003976] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:53,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:53,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:21:53,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960248738] [2021-12-21 10:21:53,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:53,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:21:53,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:53,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:21:53,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:21:53,029 INFO L87 Difference]: Start difference. First operand 136 states and 211 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) [2021-12-21 10:21:55,044 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 [] [2021-12-21 10:21:55,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:55,276 INFO L93 Difference]: Finished difference Result 358 states and 553 transitions. [2021-12-21 10:21:55,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:21:55,276 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 [2021-12-21 10:21:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:55,278 INFO L225 Difference]: With dead ends: 358 [2021-12-21 10:21:55,278 INFO L226 Difference]: Without dead ends: 229 [2021-12-21 10:21:55,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:21:55,279 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 108 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 44 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:55,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 264 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 10:21:55,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-12-21 10:21:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2021-12-21 10:21:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.59375) internal successors, (255), 160 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:21:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 255 transitions. [2021-12-21 10:21:55,287 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 255 transitions. Word has length 25 [2021-12-21 10:21:55,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:55,287 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 255 transitions. [2021-12-21 10:21:55,287 INFO L471 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) [2021-12-21 10:21:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 255 transitions. [2021-12-21 10:21:55,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-21 10:21:55,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:55,289 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:21:55,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:21:55,289 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:55,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:55,290 INFO L85 PathProgramCache]: Analyzing trace with hash -144154468, now seen corresponding path program 1 times [2021-12-21 10:21:55,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:55,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787718314] [2021-12-21 10:21:55,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:55,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:55,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:55,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787718314] [2021-12-21 10:21:55,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787718314] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:55,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:55,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:21:55,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604348250] [2021-12-21 10:21:55,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:55,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:21:55,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:55,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:21:55,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:21:55,442 INFO L87 Difference]: Start difference. First operand 161 states and 255 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:21:57,455 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 [] [2021-12-21 10:21:57,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:21:57,661 INFO L93 Difference]: Finished difference Result 408 states and 639 transitions. [2021-12-21 10:21:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:21:57,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-12-21 10:21:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:21:57,663 INFO L225 Difference]: With dead ends: 408 [2021-12-21 10:21:57,663 INFO L226 Difference]: Without dead ends: 254 [2021-12-21 10:21:57,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:21:57,664 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 110 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:21:57,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 264 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 10:21:57,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-21 10:21:57,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 183. [2021-12-21 10:21:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.6043956043956045) internal successors, (292), 182 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:21:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 292 transitions. [2021-12-21 10:21:57,672 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 292 transitions. Word has length 45 [2021-12-21 10:21:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:21:57,672 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 292 transitions. [2021-12-21 10:21:57,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:21:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 292 transitions. [2021-12-21 10:21:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 10:21:57,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:21:57,674 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 10:21:57,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:21:57,674 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:21:57,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:21:57,675 INFO L85 PathProgramCache]: Analyzing trace with hash 205659207, now seen corresponding path program 1 times [2021-12-21 10:21:57,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:21:57,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224585245] [2021-12-21 10:21:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:21:57,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:21:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:21:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:21:57,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:21:57,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224585245] [2021-12-21 10:21:57,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224585245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:21:57,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:21:57,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:21:57,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955934213] [2021-12-21 10:21:57,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:21:57,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:21:57,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:21:57,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:21:57,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:21:57,878 INFO L87 Difference]: Start difference. First operand 183 states and 292 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:21:59,891 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 [] [2021-12-21 10:22:00,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:00,136 INFO L93 Difference]: Finished difference Result 427 states and 670 transitions. [2021-12-21 10:22:00,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:00,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-21 10:22:00,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:00,138 INFO L225 Difference]: With dead ends: 427 [2021-12-21 10:22:00,138 INFO L226 Difference]: Without dead ends: 251 [2021-12-21 10:22:00,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:22:00,141 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 109 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 276 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 [2021-12-21 10:22:00,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 276 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 10:22:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-12-21 10:22:00,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 183. [2021-12-21 10:22:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.5934065934065933) internal successors, (290), 182 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:00,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 290 transitions. [2021-12-21 10:22:00,150 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 290 transitions. Word has length 46 [2021-12-21 10:22:00,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:00,150 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 290 transitions. [2021-12-21 10:22:00,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:00,150 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 290 transitions. [2021-12-21 10:22:00,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 10:22:00,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:00,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:22:00,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:22:00,155 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:00,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1474224769, now seen corresponding path program 1 times [2021-12-21 10:22:00,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:00,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223782686] [2021-12-21 10:22:00,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:00,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:00,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:22:00,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:00,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223782686] [2021-12-21 10:22:00,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223782686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:00,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:00,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:00,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826651549] [2021-12-21 10:22:00,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:00,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:00,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:00,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:00,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:00,326 INFO L87 Difference]: Start difference. First operand 183 states and 290 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:02,333 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 [] [2021-12-21 10:22:02,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:02,553 INFO L93 Difference]: Finished difference Result 454 states and 709 transitions. [2021-12-21 10:22:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:02,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 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 [2021-12-21 10:22:02,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:02,555 INFO L225 Difference]: With dead ends: 454 [2021-12-21 10:22:02,555 INFO L226 Difference]: Without dead ends: 278 [2021-12-21 10:22:02,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:22:02,556 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 95 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:02,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 278 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 10:22:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-21 10:22:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 221. [2021-12-21 10:22:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.6090909090909091) internal successors, (354), 220 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 354 transitions. [2021-12-21 10:22:02,564 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 354 transitions. Word has length 60 [2021-12-21 10:22:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:02,564 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 354 transitions. [2021-12-21 10:22:02,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 354 transitions. [2021-12-21 10:22:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 10:22:02,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:02,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:22:02,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:22:02,566 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1037370134, now seen corresponding path program 1 times [2021-12-21 10:22:02,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:02,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584263552] [2021-12-21 10:22:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:02,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 10:22:02,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:02,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584263552] [2021-12-21 10:22:02,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584263552] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:02,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:02,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:02,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21022633] [2021-12-21 10:22:02,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:02,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:02,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:02,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:02,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:02,722 INFO L87 Difference]: Start difference. First operand 221 states and 354 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:04,735 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 [] [2021-12-21 10:22:04,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:04,879 INFO L93 Difference]: Finished difference Result 439 states and 702 transitions. [2021-12-21 10:22:04,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:04,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 10:22:04,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:04,881 INFO L225 Difference]: With dead ends: 439 [2021-12-21 10:22:04,881 INFO L226 Difference]: Without dead ends: 225 [2021-12-21 10:22:04,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:22:04,883 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 7 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 403 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 [2021-12-21 10:22:04,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 403 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-21 10:22:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-21 10:22:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2021-12-21 10:22:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.600896860986547) internal successors, (357), 223 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 357 transitions. [2021-12-21 10:22:04,892 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 357 transitions. Word has length 61 [2021-12-21 10:22:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:04,894 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 357 transitions. [2021-12-21 10:22:04,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 357 transitions. [2021-12-21 10:22:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 10:22:04,897 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:04,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:22:04,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:22:04,897 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:04,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:04,898 INFO L85 PathProgramCache]: Analyzing trace with hash 293122238, now seen corresponding path program 1 times [2021-12-21 10:22:04,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:04,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260245851] [2021-12-21 10:22:04,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:04,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-21 10:22:05,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260245851] [2021-12-21 10:22:05,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260245851] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:05,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:05,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:22:05,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733370679] [2021-12-21 10:22:05,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:05,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:22:05,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:22:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:22:05,050 INFO L87 Difference]: Start difference. First operand 224 states and 357 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:05,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:05,069 INFO L93 Difference]: Finished difference Result 648 states and 1039 transitions. [2021-12-21 10:22:05,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:22:05,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-21 10:22:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:05,071 INFO L225 Difference]: With dead ends: 648 [2021-12-21 10:22:05,071 INFO L226 Difference]: Without dead ends: 434 [2021-12-21 10:22:05,072 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:22:05,073 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 105 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 310 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 [2021-12-21 10:22:05,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 310 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 10:22:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-12-21 10:22:05,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2021-12-21 10:22:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.5935334872979214) internal successors, (690), 433 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 690 transitions. [2021-12-21 10:22:05,082 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 690 transitions. Word has length 75 [2021-12-21 10:22:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:05,083 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 690 transitions. [2021-12-21 10:22:05,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 690 transitions. [2021-12-21 10:22:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 10:22:05,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:05,085 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 10:22:05,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:22:05,085 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:05,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:05,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1937748602, now seen corresponding path program 1 times [2021-12-21 10:22:05,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:05,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024013340] [2021-12-21 10:22:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:05,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-21 10:22:05,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:05,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024013340] [2021-12-21 10:22:05,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024013340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:05,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:05,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:05,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858310077] [2021-12-21 10:22:05,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:05,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:05,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:05,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:05,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:05,283 INFO L87 Difference]: Start difference. First operand 434 states and 690 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) [2021-12-21 10:22:07,296 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 [] [2021-12-21 10:22:09,307 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 [] [2021-12-21 10:22:09,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:09,468 INFO L93 Difference]: Finished difference Result 683 states and 1086 transitions. [2021-12-21 10:22:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:09,469 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 90 [2021-12-21 10:22:09,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:09,471 INFO L225 Difference]: With dead ends: 683 [2021-12-21 10:22:09,471 INFO L226 Difference]: Without dead ends: 469 [2021-12-21 10:22:09,471 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:22:09,472 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 31 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:09,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 470 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 135 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-21 10:22:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-21 10:22:09,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 452. [2021-12-21 10:22:09,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.5964523281596452) internal successors, (720), 451 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 720 transitions. [2021-12-21 10:22:09,484 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 720 transitions. Word has length 90 [2021-12-21 10:22:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:09,484 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 720 transitions. [2021-12-21 10:22:09,485 INFO L471 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) [2021-12-21 10:22:09,485 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 720 transitions. [2021-12-21 10:22:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 10:22:09,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:09,486 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:22:09,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:22:09,486 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:09,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:09,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1785137362, now seen corresponding path program 2 times [2021-12-21 10:22:09,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:09,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184112348] [2021-12-21 10:22:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:09,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 10:22:09,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:09,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184112348] [2021-12-21 10:22:09,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184112348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:09,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:09,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:09,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811713820] [2021-12-21 10:22:09,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:09,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:09,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:09,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:09,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:09,701 INFO L87 Difference]: Start difference. First operand 452 states and 720 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:11,739 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:22:13,749 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 [] [2021-12-21 10:22:13,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:13,979 INFO L93 Difference]: Finished difference Result 1025 states and 1610 transitions. [2021-12-21 10:22:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:13,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-21 10:22:13,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:13,982 INFO L225 Difference]: With dead ends: 1025 [2021-12-21 10:22:13,982 INFO L226 Difference]: Without dead ends: 583 [2021-12-21 10:22:13,982 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:22:13,983 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 110 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 40 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:13,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 294 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 203 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-21 10:22:13,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-12-21 10:22:13,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 452. [2021-12-21 10:22:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.5764966740576496) internal successors, (711), 451 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:13,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 711 transitions. [2021-12-21 10:22:13,996 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 711 transitions. Word has length 104 [2021-12-21 10:22:13,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:13,997 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 711 transitions. [2021-12-21 10:22:13,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:13,997 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 711 transitions. [2021-12-21 10:22:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 10:22:13,998 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:13,998 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:22:13,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:22:13,999 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:13,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:13,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1971820364, now seen corresponding path program 1 times [2021-12-21 10:22:14,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:14,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737923461] [2021-12-21 10:22:14,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:14,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 10:22:14,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:14,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737923461] [2021-12-21 10:22:14,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737923461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:14,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:14,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:14,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020108912] [2021-12-21 10:22:14,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:14,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:14,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:14,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:14,200 INFO L87 Difference]: Start difference. First operand 452 states and 711 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:15,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:22:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:15,795 INFO L93 Difference]: Finished difference Result 1026 states and 1593 transitions. [2021-12-21 10:22:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:15,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-21 10:22:15,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:15,797 INFO L225 Difference]: With dead ends: 1026 [2021-12-21 10:22:15,797 INFO L226 Difference]: Without dead ends: 584 [2021-12-21 10:22:15,798 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:22:15,798 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 117 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:15,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 276 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 10:22:15,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-12-21 10:22:15,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 452. [2021-12-21 10:22:15,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.5565410199556542) internal successors, (702), 451 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 702 transitions. [2021-12-21 10:22:15,806 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 702 transitions. Word has length 104 [2021-12-21 10:22:15,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:15,806 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 702 transitions. [2021-12-21 10:22:15,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:15,806 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 702 transitions. [2021-12-21 10:22:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-21 10:22:15,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:15,807 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:22:15,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:22:15,807 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:15,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:15,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2099676087, now seen corresponding path program 1 times [2021-12-21 10:22:15,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:15,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815618912] [2021-12-21 10:22:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:15,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:15,977 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 10:22:15,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:15,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815618912] [2021-12-21 10:22:15,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815618912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:15,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:15,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:15,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141448693] [2021-12-21 10:22:15,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:15,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:15,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:15,981 INFO L87 Difference]: Start difference. First operand 452 states and 702 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) [2021-12-21 10:22:17,990 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:22:20,014 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:22:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:20,184 INFO L93 Difference]: Finished difference Result 700 states and 1086 transitions. [2021-12-21 10:22:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:20,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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 105 [2021-12-21 10:22:20,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:20,187 INFO L225 Difference]: With dead ends: 700 [2021-12-21 10:22:20,187 INFO L226 Difference]: Without dead ends: 468 [2021-12-21 10:22:20,188 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:22:20,188 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 33 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:20,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 466 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-21 10:22:20,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-21 10:22:20,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 452. [2021-12-21 10:22:20,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.5543237250554325) internal successors, (701), 451 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 701 transitions. [2021-12-21 10:22:20,198 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 701 transitions. Word has length 105 [2021-12-21 10:22:20,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:20,198 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 701 transitions. [2021-12-21 10:22:20,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 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) [2021-12-21 10:22:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 701 transitions. [2021-12-21 10:22:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 10:22:20,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:20,199 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:22:20,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 10:22:20,200 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:20,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1272148111, now seen corresponding path program 1 times [2021-12-21 10:22:20,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:20,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154852621] [2021-12-21 10:22:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:20,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 10:22:20,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154852621] [2021-12-21 10:22:20,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154852621] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:20,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:20,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:20,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372742777] [2021-12-21 10:22:20,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:20,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:20,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:20,365 INFO L87 Difference]: Start difference. First operand 452 states and 701 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:22,375 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 [] [2021-12-21 10:22:22,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:22,589 INFO L93 Difference]: Finished difference Result 1026 states and 1573 transitions. [2021-12-21 10:22:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:22,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-12-21 10:22:22,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:22,591 INFO L225 Difference]: With dead ends: 1026 [2021-12-21 10:22:22,591 INFO L226 Difference]: Without dead ends: 584 [2021-12-21 10:22:22,592 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:22:22,592 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 114 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 276 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 [2021-12-21 10:22:22,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 276 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 10:22:22,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-12-21 10:22:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 452. [2021-12-21 10:22:22,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.5343680709534369) internal successors, (692), 451 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:22,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 692 transitions. [2021-12-21 10:22:22,602 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 692 transitions. Word has length 106 [2021-12-21 10:22:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:22,602 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 692 transitions. [2021-12-21 10:22:22,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 692 transitions. [2021-12-21 10:22:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-21 10:22:22,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:22,603 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:22:22,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 10:22:22,604 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:22,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:22,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1464900164, now seen corresponding path program 1 times [2021-12-21 10:22:22,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:22,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98270094] [2021-12-21 10:22:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:22,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:22,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 10:22:22,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:22,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98270094] [2021-12-21 10:22:22,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98270094] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:22,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:22,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:22,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543451136] [2021-12-21 10:22:22,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:22,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:22,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:22,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:22,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:22,761 INFO L87 Difference]: Start difference. First operand 452 states and 692 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:24,775 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 [] [2021-12-21 10:22:26,785 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 [] [2021-12-21 10:22:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:26,921 INFO L93 Difference]: Finished difference Result 691 states and 1059 transitions. [2021-12-21 10:22:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-12-21 10:22:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:26,923 INFO L225 Difference]: With dead ends: 691 [2021-12-21 10:22:26,923 INFO L226 Difference]: Without dead ends: 459 [2021-12-21 10:22:26,924 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:22:26,924 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 22 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:26,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 450 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 2 Unknown, 0 Unchecked, 4.1s Time] [2021-12-21 10:22:26,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-21 10:22:26,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 452. [2021-12-21 10:22:26,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.5321507760532151) internal successors, (691), 451 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:26,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 691 transitions. [2021-12-21 10:22:26,933 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 691 transitions. Word has length 107 [2021-12-21 10:22:26,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:26,933 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 691 transitions. [2021-12-21 10:22:26,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:26,933 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 691 transitions. [2021-12-21 10:22:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-21 10:22:26,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:26,934 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:26,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 10:22:26,935 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:26,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2029459340, now seen corresponding path program 1 times [2021-12-21 10:22:26,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:26,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848550171] [2021-12-21 10:22:26,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:26,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:27,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:22:27,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:27,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848550171] [2021-12-21 10:22:27,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848550171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:27,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:27,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:27,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353146012] [2021-12-21 10:22:27,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:27,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:27,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:27,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:27,085 INFO L87 Difference]: Start difference. First operand 452 states and 691 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:29,095 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 [] [2021-12-21 10:22:31,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:22:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:31,278 INFO L93 Difference]: Finished difference Result 1059 states and 1609 transitions. [2021-12-21 10:22:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:31,278 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-21 10:22:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:31,280 INFO L225 Difference]: With dead ends: 1059 [2021-12-21 10:22:31,280 INFO L226 Difference]: Without dead ends: 617 [2021-12-21 10:22:31,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:22:31,281 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 68 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:31,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 530 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-12-21 10:22:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-12-21 10:22:31,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 528. [2021-12-21 10:22:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 1.5426944971537002) internal successors, (813), 527 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 813 transitions. [2021-12-21 10:22:31,291 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 813 transitions. Word has length 108 [2021-12-21 10:22:31,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:31,291 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 813 transitions. [2021-12-21 10:22:31,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 813 transitions. [2021-12-21 10:22:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-21 10:22:31,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:31,293 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:31,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:22:31,293 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:31,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1379060519, now seen corresponding path program 1 times [2021-12-21 10:22:31,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:31,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010844409] [2021-12-21 10:22:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:31,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:31,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:22:31,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:31,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010844409] [2021-12-21 10:22:31,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010844409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:31,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:31,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:31,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463666743] [2021-12-21 10:22:31,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:31,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:31,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:31,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:31,473 INFO L87 Difference]: Start difference. First operand 528 states and 813 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:33,480 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 [] [2021-12-21 10:22:35,487 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 [] [2021-12-21 10:22:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:35,703 INFO L93 Difference]: Finished difference Result 1135 states and 1729 transitions. [2021-12-21 10:22:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:35,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-21 10:22:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:35,705 INFO L225 Difference]: With dead ends: 1135 [2021-12-21 10:22:35,705 INFO L226 Difference]: Without dead ends: 617 [2021-12-21 10:22:35,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:22:35,706 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 66 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 528 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 [2021-12-21 10:22:35,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 528 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-21 10:22:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-12-21 10:22:35,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 530. [2021-12-21 10:22:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 1.5406427221172023) internal successors, (815), 529 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 815 transitions. [2021-12-21 10:22:35,715 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 815 transitions. Word has length 108 [2021-12-21 10:22:35,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:35,715 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 815 transitions. [2021-12-21 10:22:35,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 815 transitions. [2021-12-21 10:22:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-21 10:22:35,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:35,717 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:35,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 10:22:35,717 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:35,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:35,718 INFO L85 PathProgramCache]: Analyzing trace with hash -303933298, now seen corresponding path program 1 times [2021-12-21 10:22:35,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:35,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426345649] [2021-12-21 10:22:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:35,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:35,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:35,870 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:22:35,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:35,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426345649] [2021-12-21 10:22:35,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426345649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:35,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:35,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:35,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499761779] [2021-12-21 10:22:35,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:35,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:35,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:35,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:35,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:35,874 INFO L87 Difference]: Start difference. First operand 530 states and 815 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:37,881 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 [] [2021-12-21 10:22:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:38,143 INFO L93 Difference]: Finished difference Result 1182 states and 1801 transitions. [2021-12-21 10:22:38,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:38,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-21 10:22:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:38,148 INFO L225 Difference]: With dead ends: 1182 [2021-12-21 10:22:38,148 INFO L226 Difference]: Without dead ends: 662 [2021-12-21 10:22:38,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:22:38,149 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 91 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 276 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 [2021-12-21 10:22:38,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 276 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 10:22:38,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-21 10:22:38,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 554. [2021-12-21 10:22:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 1.5569620253164558) internal successors, (861), 553 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:38,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 861 transitions. [2021-12-21 10:22:38,188 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 861 transitions. Word has length 108 [2021-12-21 10:22:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:38,188 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 861 transitions. [2021-12-21 10:22:38,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:38,188 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 861 transitions. [2021-12-21 10:22:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-21 10:22:38,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:38,189 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:38,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 10:22:38,189 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:38,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:38,190 INFO L85 PathProgramCache]: Analyzing trace with hash 582514139, now seen corresponding path program 1 times [2021-12-21 10:22:38,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:38,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346512007] [2021-12-21 10:22:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:38,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-21 10:22:38,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:38,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346512007] [2021-12-21 10:22:38,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346512007] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:38,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:38,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:38,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260900850] [2021-12-21 10:22:38,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:38,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:38,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:38,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:38,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:38,437 INFO L87 Difference]: Start difference. First operand 554 states and 861 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:40,451 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:22:42,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 10:22:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:42,648 INFO L93 Difference]: Finished difference Result 1181 states and 1827 transitions. [2021-12-21 10:22:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:42,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-21 10:22:42,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:42,651 INFO L225 Difference]: With dead ends: 1181 [2021-12-21 10:22:42,651 INFO L226 Difference]: Without dead ends: 637 [2021-12-21 10:22:42,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:22:42,652 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 37 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:42,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 488 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 143 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-21 10:22:42,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-12-21 10:22:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 594. [2021-12-21 10:22:42,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.5564924114671164) internal successors, (923), 593 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 923 transitions. [2021-12-21 10:22:42,668 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 923 transitions. Word has length 108 [2021-12-21 10:22:42,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:42,669 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 923 transitions. [2021-12-21 10:22:42,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 923 transitions. [2021-12-21 10:22:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 10:22:42,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:42,670 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:42,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 10:22:42,670 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:42,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:42,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1195640152, now seen corresponding path program 1 times [2021-12-21 10:22:42,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:42,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535766396] [2021-12-21 10:22:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:42,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:22:42,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:42,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535766396] [2021-12-21 10:22:42,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535766396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:42,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:42,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:42,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380643459] [2021-12-21 10:22:42,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:42,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:42,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:42,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:42,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:42,844 INFO L87 Difference]: Start difference. First operand 594 states and 923 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) [2021-12-21 10:22:44,874 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 [] [2021-12-21 10:22:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:45,116 INFO L93 Difference]: Finished difference Result 1286 states and 1969 transitions. [2021-12-21 10:22:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:45,122 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 [2021-12-21 10:22:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:45,124 INFO L225 Difference]: With dead ends: 1286 [2021-12-21 10:22:45,124 INFO L226 Difference]: Without dead ends: 702 [2021-12-21 10:22:45,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:22:45,125 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 88 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 42 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 272 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 [2021-12-21 10:22:45,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 272 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 209 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 10:22:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-21 10:22:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 598. [2021-12-21 10:22:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.5561139028475712) internal successors, (929), 597 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 929 transitions. [2021-12-21 10:22:45,163 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 929 transitions. Word has length 109 [2021-12-21 10:22:45,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:45,163 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 929 transitions. [2021-12-21 10:22:45,164 INFO L471 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) [2021-12-21 10:22:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 929 transitions. [2021-12-21 10:22:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 10:22:45,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:45,165 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:45,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 10:22:45,165 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1791034879, now seen corresponding path program 1 times [2021-12-21 10:22:45,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:45,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355599484] [2021-12-21 10:22:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:45,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 10:22:45,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:45,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355599484] [2021-12-21 10:22:45,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355599484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:45,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:45,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:45,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716788519] [2021-12-21 10:22:45,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:45,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:45,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:45,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:45,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:45,334 INFO L87 Difference]: Start difference. First operand 598 states and 929 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) [2021-12-21 10:22:47,341 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 [] [2021-12-21 10:22:49,356 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 [] [2021-12-21 10:22:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:49,563 INFO L93 Difference]: Finished difference Result 1269 states and 1951 transitions. [2021-12-21 10:22:49,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:49,563 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 110 [2021-12-21 10:22:49,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:49,565 INFO L225 Difference]: With dead ends: 1269 [2021-12-21 10:22:49,565 INFO L226 Difference]: Without dead ends: 681 [2021-12-21 10:22:49,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:22:49,566 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 81 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 8 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:49,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 526 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 222 Invalid, 2 Unknown, 0 Unchecked, 4.2s Time] [2021-12-21 10:22:49,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-12-21 10:22:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 598. [2021-12-21 10:22:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 1.5527638190954773) internal successors, (927), 597 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 927 transitions. [2021-12-21 10:22:49,576 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 927 transitions. Word has length 110 [2021-12-21 10:22:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:49,576 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 927 transitions. [2021-12-21 10:22:49,577 INFO L471 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) [2021-12-21 10:22:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 927 transitions. [2021-12-21 10:22:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 10:22:49,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:49,578 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:49,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 10:22:49,578 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:49,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1059618658, now seen corresponding path program 1 times [2021-12-21 10:22:49,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:49,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610517674] [2021-12-21 10:22:49,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:49,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:49,727 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 10:22:49,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:49,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610517674] [2021-12-21 10:22:49,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610517674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:49,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:49,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:22:49,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481584833] [2021-12-21 10:22:49,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:49,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:22:49,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:49,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:22:49,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:22:49,729 INFO L87 Difference]: Start difference. First operand 598 states and 927 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) [2021-12-21 10:22:51,737 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 [] [2021-12-21 10:22:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:51,973 INFO L93 Difference]: Finished difference Result 1284 states and 1961 transitions. [2021-12-21 10:22:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:22:51,984 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 [2021-12-21 10:22:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:51,987 INFO L225 Difference]: With dead ends: 1284 [2021-12-21 10:22:51,987 INFO L226 Difference]: Without dead ends: 694 [2021-12-21 10:22:51,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:22:51,989 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 84 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:51,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 278 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 10:22:52,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-12-21 10:22:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 602. [2021-12-21 10:22:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 1.5524126455906821) internal successors, (933), 601 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 933 transitions. [2021-12-21 10:22:52,036 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 933 transitions. Word has length 110 [2021-12-21 10:22:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:52,037 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 933 transitions. [2021-12-21 10:22:52,037 INFO L471 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) [2021-12-21 10:22:52,037 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 933 transitions. [2021-12-21 10:22:52,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 10:22:52,038 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:52,038 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:52,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 10:22:52,038 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2086535811, now seen corresponding path program 1 times [2021-12-21 10:22:52,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:52,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811851335] [2021-12-21 10:22:52,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:52,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-21 10:22:52,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:52,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811851335] [2021-12-21 10:22:52,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811851335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:52,213 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:52,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:22:52,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079537758] [2021-12-21 10:22:52,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:52,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:22:52,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:52,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:22:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:22:52,214 INFO L87 Difference]: Start difference. First operand 602 states and 933 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:54,220 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 [] [2021-12-21 10:22:54,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:54,265 INFO L93 Difference]: Finished difference Result 1212 states and 1883 transitions. [2021-12-21 10:22:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:22:54,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-21 10:22:54,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:54,284 INFO L225 Difference]: With dead ends: 1212 [2021-12-21 10:22:54,284 INFO L226 Difference]: Without dead ends: 905 [2021-12-21 10:22:54,286 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:22:54,287 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 123 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:54,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 468 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 10:22:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-12-21 10:22:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 905. [2021-12-21 10:22:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 1.549778761061947) internal successors, (1401), 904 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1401 transitions. [2021-12-21 10:22:54,301 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1401 transitions. Word has length 110 [2021-12-21 10:22:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:54,301 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1401 transitions. [2021-12-21 10:22:54,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1401 transitions. [2021-12-21 10:22:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 10:22:54,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:54,317 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:54,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 10:22:54,317 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:54,317 INFO L85 PathProgramCache]: Analyzing trace with hash 400355973, now seen corresponding path program 1 times [2021-12-21 10:22:54,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:54,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306517795] [2021-12-21 10:22:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:54,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-21 10:22:54,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:54,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306517795] [2021-12-21 10:22:54,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306517795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:54,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:54,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:22:54,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222314710] [2021-12-21 10:22:54,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:54,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:22:54,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:54,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:22:54,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:22:54,495 INFO L87 Difference]: Start difference. First operand 905 states and 1401 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:56,501 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 [] [2021-12-21 10:22:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:56,553 INFO L93 Difference]: Finished difference Result 1539 states and 2380 transitions. [2021-12-21 10:22:56,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:22:56,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-12-21 10:22:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:56,556 INFO L225 Difference]: With dead ends: 1539 [2021-12-21 10:22:56,556 INFO L226 Difference]: Without dead ends: 929 [2021-12-21 10:22:56,557 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:22:56,557 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 15 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 10:22:56,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 350 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 10:22:56,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2021-12-21 10:22:56,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 929. [2021-12-21 10:22:56,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 1.5441810344827587) internal successors, (1433), 928 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1433 transitions. [2021-12-21 10:22:56,572 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1433 transitions. Word has length 110 [2021-12-21 10:22:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:56,572 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1433 transitions. [2021-12-21 10:22:56,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1433 transitions. [2021-12-21 10:22:56,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 10:22:56,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:56,574 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:56,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-21 10:22:56,574 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:56,575 INFO L85 PathProgramCache]: Analyzing trace with hash 797599730, now seen corresponding path program 1 times [2021-12-21 10:22:56,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:56,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027380651] [2021-12-21 10:22:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:56,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:56,825 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-21 10:22:56,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:56,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027380651] [2021-12-21 10:22:56,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027380651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:56,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:56,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:22:56,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303002623] [2021-12-21 10:22:56,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:56,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:22:56,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:56,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:22:56,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:22:56,828 INFO L87 Difference]: Start difference. First operand 929 states and 1433 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:58,839 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 [] [2021-12-21 10:22:58,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:22:58,904 INFO L93 Difference]: Finished difference Result 1867 states and 2885 transitions. [2021-12-21 10:22:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:22:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-21 10:22:58,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:22:58,907 INFO L225 Difference]: With dead ends: 1867 [2021-12-21 10:22:58,908 INFO L226 Difference]: Without dead ends: 1233 [2021-12-21 10:22:58,908 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:22:58,909 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 127 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 469 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 [2021-12-21 10:22:58,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 469 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-12-21 10:22:58,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-12-21 10:22:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1233. [2021-12-21 10:22:58,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 1.5438311688311688) internal successors, (1902), 1232 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:58,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1902 transitions. [2021-12-21 10:22:58,947 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1902 transitions. Word has length 112 [2021-12-21 10:22:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:22:58,947 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 1902 transitions. [2021-12-21 10:22:58,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:22:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1902 transitions. [2021-12-21 10:22:58,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-21 10:22:58,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:22:58,950 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:22:58,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 10:22:58,950 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:22:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:22:58,951 INFO L85 PathProgramCache]: Analyzing trace with hash 938148340, now seen corresponding path program 1 times [2021-12-21 10:22:58,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:22:58,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371074883] [2021-12-21 10:22:58,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:22:58,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:22:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:22:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-21 10:22:59,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:22:59,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371074883] [2021-12-21 10:22:59,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371074883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:22:59,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:22:59,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:22:59,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204195199] [2021-12-21 10:22:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:22:59,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:22:59,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:22:59,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:22:59,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:22:59,113 INFO L87 Difference]: Start difference. First operand 1233 states and 1902 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)