./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_srvr.blast.10.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 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:12:57,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:12:57,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:12:57,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:12:57,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:12:57,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:12:57,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:12:57,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:12:57,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:12:57,345 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:12:57,345 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:12:57,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:12:57,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:12:57,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:12:57,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:12:57,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:12:57,349 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:12:57,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:12:57,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:12:57,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:12:57,352 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:12:57,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:12:57,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:12:57,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:12:57,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:12:57,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:12:57,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:12:57,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:12:57,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:12:57,363 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:12:57,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:12:57,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:12:57,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:12:57,365 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:12:57,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:12:57,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:12:57,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:12:57,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:12:57,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:12:57,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:12:57,367 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:12:57,370 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:12:57,393 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:12:57,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:12:57,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:12:57,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:12:57,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:12:57,394 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:12:57,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:12:57,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:12:57,394 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:12:57,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:12:57,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:12:57,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:12:57,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:12:57,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:12:57,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06e766f2b0fb57f78717a4ab927a7f5c398a4eef6e5769d710eaeddfb253f7dd [2021-12-17 03:12:57,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:12:57,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:12:57,584 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:12:57,585 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:12:57,591 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:12:57,592 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-12-17 03:12:57,635 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60be2179/8c88f6db427f4649bbea30889a862139/FLAGe821daa8a [2021-12-17 03:12:58,016 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:12:58,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.10.i.cil-2.c [2021-12-17 03:12:58,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60be2179/8c88f6db427f4649bbea30889a862139/FLAGe821daa8a [2021-12-17 03:12:58,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60be2179/8c88f6db427f4649bbea30889a862139 [2021-12-17 03:12:58,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:12:58,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:12:58,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:12:58,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:12:58,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:12:58,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:58,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5db7bdd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58, skipping insertion in model container [2021-12-17 03:12:58,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:58,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:12:58,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:12:58,749 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_srvr.blast.10.i.cil-2.c[73311,73324] [2021-12-17 03:12:58,767 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:12:58,783 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:12:58,909 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_srvr.blast.10.i.cil-2.c[73311,73324] [2021-12-17 03:12:58,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:12:58,924 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:12:58,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58 WrapperNode [2021-12-17 03:12:58,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:12:58,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:12:58,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:12:58,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:12:58,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:58,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:58,997 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 787 [2021-12-17 03:12:58,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:12:59,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:12:59,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:12:59,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:12:59,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:59,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:59,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:59,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:59,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:59,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:59,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:59,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:12:59,052 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:12:59,053 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:12:59,053 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:12:59,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (1/1) ... [2021-12-17 03:12:59,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:12:59,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:12:59,099 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) [2021-12-17 03:12:59,132 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 [2021-12-17 03:12:59,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:12:59,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 03:12:59,142 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 03:12:59,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 03:12:59,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 03:12:59,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:12:59,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 03:12:59,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:12:59,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:12:59,264 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:12:59,265 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:12:59,292 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 03:13:01,515 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-17 03:13:01,515 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-17 03:13:01,516 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:13:01,523 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:13:01,523 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:13:01,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:13:01 BoogieIcfgContainer [2021-12-17 03:13:01,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:13:01,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:13:01,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:13:01,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:13:01,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:12:58" (1/3) ... [2021-12-17 03:13:01,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6a92e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:13:01, skipping insertion in model container [2021-12-17 03:13:01,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:12:58" (2/3) ... [2021-12-17 03:13:01,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a6a92e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:13:01, skipping insertion in model container [2021-12-17 03:13:01,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:13:01" (3/3) ... [2021-12-17 03:13:01,531 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.10.i.cil-2.c [2021-12-17 03:13:01,534 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:13:01,534 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:13:01,579 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:13:01,606 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 [2021-12-17 03:13:01,607 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:13:01,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 03:13:01,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:01,637 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:01,637 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:01,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1692155939, now seen corresponding path program 1 times [2021-12-17 03:13:01,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:01,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553543194] [2021-12-17 03:13:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:01,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:01,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:01,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553543194] [2021-12-17 03:13:01,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553543194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:01,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:01,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:01,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534989336] [2021-12-17 03:13:01,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:01,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:01,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:02,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:02,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:02,009 INFO L87 Difference]: Start difference. First operand has 147 states, 145 states have (on average 1.710344827586207) internal successors, (248), 146 states have internal predecessors, (248), 0 states have call successors, (0), 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 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:02,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:02,459 INFO L93 Difference]: Finished difference Result 319 states and 538 transitions. [2021-12-17 03:13:02,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:02,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-17 03:13:02,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:02,468 INFO L225 Difference]: With dead ends: 319 [2021-12-17 03:13:02,468 INFO L226 Difference]: Without dead ends: 162 [2021-12-17 03:13:02,471 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 [2021-12-17 03:13:02,473 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 36 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:02,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 567 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:13:02,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-17 03:13:02,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-12-17 03:13:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5486111111111112) internal successors, (223), 144 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 223 transitions. [2021-12-17 03:13:02,501 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 223 transitions. Word has length 43 [2021-12-17 03:13:02,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:02,501 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 223 transitions. [2021-12-17 03:13:02,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:02,501 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 223 transitions. [2021-12-17 03:13:02,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-17 03:13:02,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:02,503 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 03:13:02,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:13:02,503 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1840666947, now seen corresponding path program 1 times [2021-12-17 03:13:02,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:02,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423648400] [2021-12-17 03:13:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:02,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:02,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:02,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423648400] [2021-12-17 03:13:02,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423648400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:02,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:02,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:02,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240757656] [2021-12-17 03:13:02,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:02,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:02,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:02,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:02,696 INFO L87 Difference]: Start difference. First operand 145 states and 223 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:03,640 INFO L93 Difference]: Finished difference Result 286 states and 434 transitions. [2021-12-17 03:13:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:03,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-12-17 03:13:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:03,642 INFO L225 Difference]: With dead ends: 286 [2021-12-17 03:13:03,642 INFO L226 Difference]: Without dead ends: 162 [2021-12-17 03:13:03,642 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 [2021-12-17 03:13:03,643 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 24 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:03,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 453 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:13:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-12-17 03:13:03,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 145. [2021-12-17 03:13:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.5416666666666667) internal successors, (222), 144 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:03,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 222 transitions. [2021-12-17 03:13:03,653 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 222 transitions. Word has length 56 [2021-12-17 03:13:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:03,653 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 222 transitions. [2021-12-17 03:13:03,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:03,653 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 222 transitions. [2021-12-17 03:13:03,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 03:13:03,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:03,655 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:03,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:13:03,655 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1016670962, now seen corresponding path program 1 times [2021-12-17 03:13:03,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:03,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796959053] [2021-12-17 03:13:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:03,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:03,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:03,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796959053] [2021-12-17 03:13:03,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796959053] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:03,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:03,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:03,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930458998] [2021-12-17 03:13:03,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:03,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:03,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:03,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:03,750 INFO L87 Difference]: Start difference. First operand 145 states and 222 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:04,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:05,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:05,093 INFO L93 Difference]: Finished difference Result 383 states and 589 transitions. [2021-12-17 03:13:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:05,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-17 03:13:05,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:05,095 INFO L225 Difference]: With dead ends: 383 [2021-12-17 03:13:05,095 INFO L226 Difference]: Without dead ends: 259 [2021-12-17 03:13:05,096 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 [2021-12-17 03:13:05,096 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 144 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:05,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 314 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 03:13:05,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-17 03:13:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 156. [2021-12-17 03:13:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5290322580645161) internal successors, (237), 155 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 237 transitions. [2021-12-17 03:13:05,106 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 237 transitions. Word has length 57 [2021-12-17 03:13:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:05,106 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 237 transitions. [2021-12-17 03:13:05,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 237 transitions. [2021-12-17 03:13:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 03:13:05,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:05,107 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:05,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:13:05,108 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:05,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2020292958, now seen corresponding path program 1 times [2021-12-17 03:13:05,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:05,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105640656] [2021-12-17 03:13:05,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:05,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:05,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:05,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105640656] [2021-12-17 03:13:05,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105640656] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:05,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:05,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:05,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428695179] [2021-12-17 03:13:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:05,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:05,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:05,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:05,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:05,265 INFO L87 Difference]: Start difference. First operand 156 states and 237 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:06,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:06,314 INFO L93 Difference]: Finished difference Result 394 states and 603 transitions. [2021-12-17 03:13:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:06,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-17 03:13:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:06,316 INFO L225 Difference]: With dead ends: 394 [2021-12-17 03:13:06,316 INFO L226 Difference]: Without dead ends: 259 [2021-12-17 03:13:06,317 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 [2021-12-17 03:13:06,317 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 142 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:06,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 314 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 03:13:06,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-17 03:13:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 157. [2021-12-17 03:13:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.5192307692307692) internal successors, (237), 156 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 237 transitions. [2021-12-17 03:13:06,324 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 237 transitions. Word has length 57 [2021-12-17 03:13:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:06,324 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 237 transitions. [2021-12-17 03:13:06,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 237 transitions. [2021-12-17 03:13:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 03:13:06,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:06,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:06,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:13:06,326 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:06,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:06,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1406749497, now seen corresponding path program 1 times [2021-12-17 03:13:06,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:06,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761995574] [2021-12-17 03:13:06,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:06,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:06,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:06,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761995574] [2021-12-17 03:13:06,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761995574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:06,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:06,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:06,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853605249] [2021-12-17 03:13:06,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:06,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:06,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:06,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:06,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:06,397 INFO L87 Difference]: Start difference. First operand 157 states and 237 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:08,412 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 [] [2021-12-17 03:13:08,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:08,684 INFO L93 Difference]: Finished difference Result 394 states and 601 transitions. [2021-12-17 03:13:08,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:08,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-17 03:13:08,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:08,685 INFO L225 Difference]: With dead ends: 394 [2021-12-17 03:13:08,686 INFO L226 Difference]: Without dead ends: 258 [2021-12-17 03:13:08,686 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 [2021-12-17 03:13:08,687 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 135 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:08,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 316 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:13:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-17 03:13:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2021-12-17 03:13:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5246913580246915) internal successors, (247), 162 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 247 transitions. [2021-12-17 03:13:08,692 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 247 transitions. Word has length 57 [2021-12-17 03:13:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:08,692 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 247 transitions. [2021-12-17 03:13:08,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 247 transitions. [2021-12-17 03:13:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-17 03:13:08,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:08,693 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 03:13:08,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:13:08,694 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2142094329, now seen corresponding path program 1 times [2021-12-17 03:13:08,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:08,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653214013] [2021-12-17 03:13:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:08,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:08,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:08,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653214013] [2021-12-17 03:13:08,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653214013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:08,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:08,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:08,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257694664] [2021-12-17 03:13:08,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:08,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:08,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:08,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:08,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:08,784 INFO L87 Difference]: Start difference. First operand 163 states and 247 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:10,795 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 [] [2021-12-17 03:13:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:10,968 INFO L93 Difference]: Finished difference Result 318 states and 482 transitions. [2021-12-17 03:13:10,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:10,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-17 03:13:10,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:10,970 INFO L225 Difference]: With dead ends: 318 [2021-12-17 03:13:10,970 INFO L226 Difference]: Without dead ends: 176 [2021-12-17 03:13:10,970 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 [2021-12-17 03:13:10,971 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 19 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:10,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 461 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:10,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-17 03:13:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 163. [2021-12-17 03:13:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5185185185185186) internal successors, (246), 162 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:10,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 246 transitions. [2021-12-17 03:13:10,981 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 246 transitions. Word has length 57 [2021-12-17 03:13:10,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:10,982 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 246 transitions. [2021-12-17 03:13:10,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 246 transitions. [2021-12-17 03:13:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 03:13:10,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:10,985 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 03:13:10,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:13:10,985 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:10,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:10,986 INFO L85 PathProgramCache]: Analyzing trace with hash 431241126, now seen corresponding path program 1 times [2021-12-17 03:13:10,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:10,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817939310] [2021-12-17 03:13:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:10,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:11,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:11,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817939310] [2021-12-17 03:13:11,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817939310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:11,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:11,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:11,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321944411] [2021-12-17 03:13:11,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:11,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:11,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:11,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:11,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:11,072 INFO L87 Difference]: Start difference. First operand 163 states and 246 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:13,080 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 [] [2021-12-17 03:13:13,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:13,344 INFO L93 Difference]: Finished difference Result 400 states and 609 transitions. [2021-12-17 03:13:13,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:13,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-17 03:13:13,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:13,345 INFO L225 Difference]: With dead ends: 400 [2021-12-17 03:13:13,345 INFO L226 Difference]: Without dead ends: 258 [2021-12-17 03:13:13,346 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 [2021-12-17 03:13:13,347 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 139 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:13,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 316 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:13:13,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-17 03:13:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2021-12-17 03:13:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5061728395061729) internal successors, (244), 162 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 244 transitions. [2021-12-17 03:13:13,356 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 244 transitions. Word has length 58 [2021-12-17 03:13:13,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:13,356 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 244 transitions. [2021-12-17 03:13:13,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 244 transitions. [2021-12-17 03:13:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 03:13:13,357 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:13,357 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 03:13:13,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:13:13,357 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash -794381401, now seen corresponding path program 1 times [2021-12-17 03:13:13,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:13,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781543161] [2021-12-17 03:13:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:13,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:13,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:13,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781543161] [2021-12-17 03:13:13,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781543161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:13,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:13,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:13,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067772629] [2021-12-17 03:13:13,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:13,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:13,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:13,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:13,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:13,436 INFO L87 Difference]: Start difference. First operand 163 states and 244 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:15,451 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 [] [2021-12-17 03:13:15,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:15,627 INFO L93 Difference]: Finished difference Result 318 states and 478 transitions. [2021-12-17 03:13:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-17 03:13:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:15,631 INFO L225 Difference]: With dead ends: 318 [2021-12-17 03:13:15,631 INFO L226 Difference]: Without dead ends: 176 [2021-12-17 03:13:15,632 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 [2021-12-17 03:13:15,632 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 20 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:15,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 461 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-12-17 03:13:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 163. [2021-12-17 03:13:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.5) internal successors, (243), 162 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 243 transitions. [2021-12-17 03:13:15,636 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 243 transitions. Word has length 59 [2021-12-17 03:13:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:15,636 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 243 transitions. [2021-12-17 03:13:15,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 243 transitions. [2021-12-17 03:13:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 03:13:15,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:15,637 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 03:13:15,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:13:15,637 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:15,638 INFO L85 PathProgramCache]: Analyzing trace with hash -47741877, now seen corresponding path program 1 times [2021-12-17 03:13:15,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:15,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237373415] [2021-12-17 03:13:15,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:15,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:15,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:15,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237373415] [2021-12-17 03:13:15,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237373415] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:15,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:15,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:15,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828543164] [2021-12-17 03:13:15,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:15,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:15,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:15,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:15,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:15,729 INFO L87 Difference]: Start difference. First operand 163 states and 243 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) [2021-12-17 03:13:17,624 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:17,898 INFO L93 Difference]: Finished difference Result 400 states and 605 transitions. [2021-12-17 03:13:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:17,898 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 [2021-12-17 03:13:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:17,899 INFO L225 Difference]: With dead ends: 400 [2021-12-17 03:13:17,899 INFO L226 Difference]: Without dead ends: 258 [2021-12-17 03:13:17,900 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 [2021-12-17 03:13:17,900 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 136 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:17,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 316 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:17,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-12-17 03:13:17,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2021-12-17 03:13:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.4876543209876543) internal successors, (241), 162 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 241 transitions. [2021-12-17 03:13:17,904 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 241 transitions. Word has length 60 [2021-12-17 03:13:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:17,904 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 241 transitions. [2021-12-17 03:13:17,904 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) [2021-12-17 03:13:17,904 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 241 transitions. [2021-12-17 03:13:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 03:13:17,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:17,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:17,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:13:17,905 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:17,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:17,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1082346419, now seen corresponding path program 1 times [2021-12-17 03:13:17,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:17,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837003848] [2021-12-17 03:13:17,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:17,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:17,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:17,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837003848] [2021-12-17 03:13:17,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837003848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:17,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:17,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:17,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446809928] [2021-12-17 03:13:17,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:17,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:17,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:17,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:17,972 INFO L87 Difference]: Start difference. First operand 163 states and 241 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) [2021-12-17 03:13:19,983 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 [] [2021-12-17 03:13:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:20,260 INFO L93 Difference]: Finished difference Result 419 states and 629 transitions. [2021-12-17 03:13:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:20,260 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 [2021-12-17 03:13:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:20,261 INFO L225 Difference]: With dead ends: 419 [2021-12-17 03:13:20,261 INFO L226 Difference]: Without dead ends: 277 [2021-12-17 03:13:20,262 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 [2021-12-17 03:13:20,262 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 112 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:20,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 318 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:13:20,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-17 03:13:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 203. [2021-12-17 03:13:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.5297029702970297) internal successors, (309), 202 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 309 transitions. [2021-12-17 03:13:20,280 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 309 transitions. Word has length 60 [2021-12-17 03:13:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:20,281 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 309 transitions. [2021-12-17 03:13:20,281 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) [2021-12-17 03:13:20,281 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 309 transitions. [2021-12-17 03:13:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:13:20,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:20,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:20,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:13:20,283 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:20,283 INFO L85 PathProgramCache]: Analyzing trace with hash -813532014, now seen corresponding path program 1 times [2021-12-17 03:13:20,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:20,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528614788] [2021-12-17 03:13:20,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:20,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:13:20,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:20,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528614788] [2021-12-17 03:13:20,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528614788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:20,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:20,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:20,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833756744] [2021-12-17 03:13:20,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:20,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:20,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:20,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:20,359 INFO L87 Difference]: Start difference. First operand 203 states and 309 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:22,371 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 [] [2021-12-17 03:13:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:22,622 INFO L93 Difference]: Finished difference Result 480 states and 738 transitions. [2021-12-17 03:13:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 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 [2021-12-17 03:13:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:22,624 INFO L225 Difference]: With dead ends: 480 [2021-12-17 03:13:22,624 INFO L226 Difference]: Without dead ends: 298 [2021-12-17 03:13:22,624 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 [2021-12-17 03:13:22,624 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 111 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:22,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 332 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:22,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-17 03:13:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 225. [2021-12-17 03:13:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.5714285714285714) internal successors, (352), 224 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 352 transitions. [2021-12-17 03:13:22,629 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 352 transitions. Word has length 61 [2021-12-17 03:13:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:22,629 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 352 transitions. [2021-12-17 03:13:22,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 352 transitions. [2021-12-17 03:13:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-17 03:13:22,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:22,630 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:13:22,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:13:22,630 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:22,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1848715960, now seen corresponding path program 1 times [2021-12-17 03:13:22,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:22,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796253017] [2021-12-17 03:13:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:22,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:22,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-17 03:13:22,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:22,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796253017] [2021-12-17 03:13:22,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796253017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:22,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:22,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:22,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429974655] [2021-12-17 03:13:22,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:22,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:22,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:22,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:22,695 INFO L87 Difference]: Start difference. First operand 225 states and 352 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:24,707 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 [] [2021-12-17 03:13:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:24,888 INFO L93 Difference]: Finished difference Result 470 states and 738 transitions. [2021-12-17 03:13:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:24,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-17 03:13:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:24,890 INFO L225 Difference]: With dead ends: 470 [2021-12-17 03:13:24,890 INFO L226 Difference]: Without dead ends: 266 [2021-12-17 03:13:24,890 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 [2021-12-17 03:13:24,891 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 29 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:24,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 477 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-17 03:13:24,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 247. [2021-12-17 03:13:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.565040650406504) internal successors, (385), 246 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 385 transitions. [2021-12-17 03:13:24,895 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 385 transitions. Word has length 89 [2021-12-17 03:13:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:24,895 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 385 transitions. [2021-12-17 03:13:24,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 385 transitions. [2021-12-17 03:13:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-17 03:13:24,896 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:24,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:24,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 03:13:24,897 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:24,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash 620799502, now seen corresponding path program 1 times [2021-12-17 03:13:24,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:24,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901364585] [2021-12-17 03:13:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:24,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:13:25,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:25,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901364585] [2021-12-17 03:13:25,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901364585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:25,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:25,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:25,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932071295] [2021-12-17 03:13:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:25,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:25,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:25,017 INFO L87 Difference]: Start difference. First operand 247 states and 385 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:27,027 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 [] [2021-12-17 03:13:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:27,303 INFO L93 Difference]: Finished difference Result 586 states and 914 transitions. [2021-12-17 03:13:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:27,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 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 102 [2021-12-17 03:13:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:27,304 INFO L225 Difference]: With dead ends: 586 [2021-12-17 03:13:27,304 INFO L226 Difference]: Without dead ends: 360 [2021-12-17 03:13:27,305 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 [2021-12-17 03:13:27,305 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 134 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:27,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 332 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:13:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-12-17 03:13:27,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 263. [2021-12-17 03:13:27,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.5458015267175573) internal successors, (405), 262 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 405 transitions. [2021-12-17 03:13:27,310 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 405 transitions. Word has length 102 [2021-12-17 03:13:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:27,310 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 405 transitions. [2021-12-17 03:13:27,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 405 transitions. [2021-12-17 03:13:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-17 03:13:27,311 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:27,311 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:27,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:13:27,312 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:27,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:27,312 INFO L85 PathProgramCache]: Analyzing trace with hash -905337550, now seen corresponding path program 1 times [2021-12-17 03:13:27,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:27,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989196031] [2021-12-17 03:13:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:27,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:13:27,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:27,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989196031] [2021-12-17 03:13:27,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989196031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:27,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:27,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:27,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032096281] [2021-12-17 03:13:27,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:27,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:27,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:27,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:27,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:27,386 INFO L87 Difference]: Start difference. First operand 263 states and 405 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:29,004 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:29,176 INFO L93 Difference]: Finished difference Result 522 states and 808 transitions. [2021-12-17 03:13:29,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:29,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-12-17 03:13:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:29,177 INFO L225 Difference]: With dead ends: 522 [2021-12-17 03:13:29,177 INFO L226 Difference]: Without dead ends: 280 [2021-12-17 03:13:29,178 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 [2021-12-17 03:13:29,178 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 32 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:29,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 481 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 03:13:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-17 03:13:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 263. [2021-12-17 03:13:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.5419847328244274) internal successors, (404), 262 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 404 transitions. [2021-12-17 03:13:29,182 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 404 transitions. Word has length 103 [2021-12-17 03:13:29,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:29,182 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 404 transitions. [2021-12-17 03:13:29,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:29,183 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 404 transitions. [2021-12-17 03:13:29,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 03:13:29,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:29,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:29,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 03:13:29,185 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:29,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1950015556, now seen corresponding path program 1 times [2021-12-17 03:13:29,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:29,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062469001] [2021-12-17 03:13:29,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:29,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:29,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-17 03:13:29,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:29,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062469001] [2021-12-17 03:13:29,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062469001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:29,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:29,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:29,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310970132] [2021-12-17 03:13:29,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:29,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:29,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:29,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:29,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:29,318 INFO L87 Difference]: Start difference. First operand 263 states and 404 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:31,331 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 [] [2021-12-17 03:13:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:31,588 INFO L93 Difference]: Finished difference Result 568 states and 871 transitions. [2021-12-17 03:13:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:31,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-12-17 03:13:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:31,589 INFO L225 Difference]: With dead ends: 568 [2021-12-17 03:13:31,589 INFO L226 Difference]: Without dead ends: 326 [2021-12-17 03:13:31,590 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 [2021-12-17 03:13:31,590 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 129 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:31,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 348 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:13:31,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-17 03:13:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 263. [2021-12-17 03:13:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.5267175572519085) internal successors, (400), 262 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 400 transitions. [2021-12-17 03:13:31,595 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 400 transitions. Word has length 105 [2021-12-17 03:13:31,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:31,595 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 400 transitions. [2021-12-17 03:13:31,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:31,597 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 400 transitions. [2021-12-17 03:13:31,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 03:13:31,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:31,599 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:31,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 03:13:31,599 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:31,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:31,599 INFO L85 PathProgramCache]: Analyzing trace with hash 244140643, now seen corresponding path program 1 times [2021-12-17 03:13:31,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:31,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903568055] [2021-12-17 03:13:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:31,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:13:31,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903568055] [2021-12-17 03:13:31,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903568055] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:31,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:31,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:31,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004408856] [2021-12-17 03:13:31,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:31,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:31,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:31,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:31,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:31,676 INFO L87 Difference]: Start difference. First operand 263 states and 400 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:32,614 INFO L93 Difference]: Finished difference Result 644 states and 991 transitions. [2021-12-17 03:13:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:32,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-12-17 03:13:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:32,616 INFO L225 Difference]: With dead ends: 644 [2021-12-17 03:13:32,616 INFO L226 Difference]: Without dead ends: 402 [2021-12-17 03:13:32,616 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 [2021-12-17 03:13:32,617 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:32,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 344 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:13:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-17 03:13:32,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 327. [2021-12-17 03:13:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.539877300613497) internal successors, (502), 326 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 502 transitions. [2021-12-17 03:13:32,622 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 502 transitions. Word has length 111 [2021-12-17 03:13:32,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:32,622 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 502 transitions. [2021-12-17 03:13:32,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:32,622 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 502 transitions. [2021-12-17 03:13:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 03:13:32,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:32,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-12-17 03:13:32,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 03:13:32,625 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1113185564, now seen corresponding path program 1 times [2021-12-17 03:13:32,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:32,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779307134] [2021-12-17 03:13:32,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:32,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:13:32,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779307134] [2021-12-17 03:13:32,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779307134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:32,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:32,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:32,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143530912] [2021-12-17 03:13:32,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:32,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:32,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:32,739 INFO L87 Difference]: Start difference. First operand 327 states and 502 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:34,747 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 [] [2021-12-17 03:13:34,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:34,972 INFO L93 Difference]: Finished difference Result 717 states and 1104 transitions. [2021-12-17 03:13:34,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:34,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-17 03:13:34,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:34,974 INFO L225 Difference]: With dead ends: 717 [2021-12-17 03:13:34,974 INFO L226 Difference]: Without dead ends: 411 [2021-12-17 03:13:34,975 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 [2021-12-17 03:13:34,975 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 70 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:34,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 459 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 239 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-12-17 03:13:34,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 366. [2021-12-17 03:13:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.5452054794520549) internal successors, (564), 365 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 564 transitions. [2021-12-17 03:13:34,981 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 564 transitions. Word has length 116 [2021-12-17 03:13:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:34,981 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 564 transitions. [2021-12-17 03:13:34,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 564 transitions. [2021-12-17 03:13:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 03:13:34,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:34,982 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-12-17 03:13:34,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:13:34,982 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:34,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:34,982 INFO L85 PathProgramCache]: Analyzing trace with hash -797856994, now seen corresponding path program 1 times [2021-12-17 03:13:34,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:34,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009339198] [2021-12-17 03:13:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:34,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 03:13:35,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:35,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009339198] [2021-12-17 03:13:35,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009339198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:35,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:35,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:35,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895723230] [2021-12-17 03:13:35,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:35,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:35,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:35,054 INFO L87 Difference]: Start difference. First operand 366 states and 564 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:37,067 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 [] [2021-12-17 03:13:37,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:37,259 INFO L93 Difference]: Finished difference Result 748 states and 1156 transitions. [2021-12-17 03:13:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:37,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-17 03:13:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:37,261 INFO L225 Difference]: With dead ends: 748 [2021-12-17 03:13:37,261 INFO L226 Difference]: Without dead ends: 403 [2021-12-17 03:13:37,261 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 [2021-12-17 03:13:37,262 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 26 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:37,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 555 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-12-17 03:13:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 390. [2021-12-17 03:13:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.5398457583547558) internal successors, (599), 389 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 599 transitions. [2021-12-17 03:13:37,268 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 599 transitions. Word has length 116 [2021-12-17 03:13:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:37,268 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 599 transitions. [2021-12-17 03:13:37,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 599 transitions. [2021-12-17 03:13:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 03:13:37,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:37,269 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-12-17 03:13:37,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 03:13:37,269 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1564451825, now seen corresponding path program 1 times [2021-12-17 03:13:37,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:37,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702849889] [2021-12-17 03:13:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:37,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:13:37,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:37,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702849889] [2021-12-17 03:13:37,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702849889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:37,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:37,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:37,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68904559] [2021-12-17 03:13:37,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:37,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:37,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:37,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:37,364 INFO L87 Difference]: Start difference. First operand 390 states and 599 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:39,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:39,387 INFO L93 Difference]: Finished difference Result 822 states and 1261 transitions. [2021-12-17 03:13:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:39,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-12-17 03:13:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:39,388 INFO L225 Difference]: With dead ends: 822 [2021-12-17 03:13:39,389 INFO L226 Difference]: Without dead ends: 453 [2021-12-17 03:13:39,389 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 [2021-12-17 03:13:39,389 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 104 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:39,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 332 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 03:13:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-12-17 03:13:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 390. [2021-12-17 03:13:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.5347043701799485) internal successors, (597), 389 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 597 transitions. [2021-12-17 03:13:39,396 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 597 transitions. Word has length 117 [2021-12-17 03:13:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:39,396 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 597 transitions. [2021-12-17 03:13:39,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 597 transitions. [2021-12-17 03:13:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 03:13:39,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:39,397 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-12-17 03:13:39,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 03:13:39,398 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:39,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1399752639, now seen corresponding path program 1 times [2021-12-17 03:13:39,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:39,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876588549] [2021-12-17 03:13:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:39,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:13:39,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:39,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876588549] [2021-12-17 03:13:39,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876588549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:39,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:39,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:39,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215171780] [2021-12-17 03:13:39,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:39,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:39,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:39,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:39,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:39,474 INFO L87 Difference]: Start difference. First operand 390 states and 597 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:41,481 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 [] [2021-12-17 03:13:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:41,732 INFO L93 Difference]: Finished difference Result 862 states and 1321 transitions. [2021-12-17 03:13:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:41,733 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-17 03:13:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:41,734 INFO L225 Difference]: With dead ends: 862 [2021-12-17 03:13:41,734 INFO L226 Difference]: Without dead ends: 493 [2021-12-17 03:13:41,735 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 [2021-12-17 03:13:41,735 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 97 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:41,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 349 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 244 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-12-17 03:13:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 433. [2021-12-17 03:13:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.5416666666666667) internal successors, (666), 432 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 666 transitions. [2021-12-17 03:13:41,748 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 666 transitions. Word has length 125 [2021-12-17 03:13:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:41,749 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 666 transitions. [2021-12-17 03:13:41,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 666 transitions. [2021-12-17 03:13:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 03:13:41,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:41,750 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:41,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 03:13:41,751 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:41,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash -470053107, now seen corresponding path program 1 times [2021-12-17 03:13:41,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:41,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239322819] [2021-12-17 03:13:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:41,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:13:41,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239322819] [2021-12-17 03:13:41,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239322819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:41,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:41,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:41,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825869998] [2021-12-17 03:13:41,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:41,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:41,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:41,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:41,842 INFO L87 Difference]: Start difference. First operand 433 states and 666 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:43,848 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 [] [2021-12-17 03:13:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:44,065 INFO L93 Difference]: Finished difference Result 886 states and 1363 transitions. [2021-12-17 03:13:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:44,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-17 03:13:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:44,073 INFO L225 Difference]: With dead ends: 886 [2021-12-17 03:13:44,073 INFO L226 Difference]: Without dead ends: 474 [2021-12-17 03:13:44,074 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 [2021-12-17 03:13:44,075 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 86 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:44,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 459 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 233 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:44,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-12-17 03:13:44,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 433. [2021-12-17 03:13:44,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.5393518518518519) internal successors, (665), 432 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 665 transitions. [2021-12-17 03:13:44,095 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 665 transitions. Word has length 125 [2021-12-17 03:13:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:44,096 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 665 transitions. [2021-12-17 03:13:44,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 665 transitions. [2021-12-17 03:13:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 03:13:44,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:44,097 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:44,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 03:13:44,097 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1096704843, now seen corresponding path program 1 times [2021-12-17 03:13:44,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:44,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187442926] [2021-12-17 03:13:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:44,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:13:44,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:44,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187442926] [2021-12-17 03:13:44,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187442926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:44,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:44,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:44,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423951293] [2021-12-17 03:13:44,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:44,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:44,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:44,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:44,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:44,176 INFO L87 Difference]: Start difference. First operand 433 states and 665 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:46,181 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 [] [2021-12-17 03:13:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:46,444 INFO L93 Difference]: Finished difference Result 908 states and 1393 transitions. [2021-12-17 03:13:46,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:46,445 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-17 03:13:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:46,446 INFO L225 Difference]: With dead ends: 908 [2021-12-17 03:13:46,446 INFO L226 Difference]: Without dead ends: 496 [2021-12-17 03:13:46,447 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 [2021-12-17 03:13:46,447 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 124 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:46,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 336 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 243 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:13:46,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-17 03:13:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 433. [2021-12-17 03:13:46,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 1.525462962962963) internal successors, (659), 432 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 659 transitions. [2021-12-17 03:13:46,454 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 659 transitions. Word has length 125 [2021-12-17 03:13:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:46,454 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 659 transitions. [2021-12-17 03:13:46,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:46,454 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 659 transitions. [2021-12-17 03:13:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-17 03:13:46,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:46,455 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1] [2021-12-17 03:13:46,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 03:13:46,455 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:46,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:46,455 INFO L85 PathProgramCache]: Analyzing trace with hash 309940842, now seen corresponding path program 1 times [2021-12-17 03:13:46,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:46,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600716592] [2021-12-17 03:13:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:46,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-17 03:13:46,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:46,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600716592] [2021-12-17 03:13:46,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600716592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:46,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:46,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:46,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616442505] [2021-12-17 03:13:46,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:46,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:46,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:46,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:46,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:46,535 INFO L87 Difference]: Start difference. First operand 433 states and 659 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:48,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:13:48,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:48,668 INFO L93 Difference]: Finished difference Result 908 states and 1381 transitions. [2021-12-17 03:13:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-12-17 03:13:48,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:48,669 INFO L225 Difference]: With dead ends: 908 [2021-12-17 03:13:48,669 INFO L226 Difference]: Without dead ends: 494 [2021-12-17 03:13:48,670 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 [2021-12-17 03:13:48,670 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 97 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:48,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 336 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 03:13:48,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-12-17 03:13:48,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 435. [2021-12-17 03:13:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.5253456221198156) internal successors, (662), 434 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:48,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 662 transitions. [2021-12-17 03:13:48,678 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 662 transitions. Word has length 126 [2021-12-17 03:13:48,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:48,678 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 662 transitions. [2021-12-17 03:13:48,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:48,678 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 662 transitions. [2021-12-17 03:13:48,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 03:13:48,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:48,680 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:48,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 03:13:48,680 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:48,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:48,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1941253483, now seen corresponding path program 1 times [2021-12-17 03:13:48,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:48,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437740319] [2021-12-17 03:13:48,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:48,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:13:48,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:48,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437740319] [2021-12-17 03:13:48,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437740319] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:48,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:48,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:48,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333963326] [2021-12-17 03:13:48,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:48,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:48,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:48,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:48,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:48,753 INFO L87 Difference]: Start difference. First operand 435 states and 662 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) [2021-12-17 03:13:50,758 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 [] [2021-12-17 03:13:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:50,981 INFO L93 Difference]: Finished difference Result 884 states and 1346 transitions. [2021-12-17 03:13:50,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:50,982 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 138 [2021-12-17 03:13:50,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:50,983 INFO L225 Difference]: With dead ends: 884 [2021-12-17 03:13:50,983 INFO L226 Difference]: Without dead ends: 470 [2021-12-17 03:13:50,984 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 [2021-12-17 03:13:50,984 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 70 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:50,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 477 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-17 03:13:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 435. [2021-12-17 03:13:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.523041474654378) internal successors, (661), 434 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 661 transitions. [2021-12-17 03:13:50,990 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 661 transitions. Word has length 138 [2021-12-17 03:13:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:50,991 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 661 transitions. [2021-12-17 03:13:50,991 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) [2021-12-17 03:13:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 661 transitions. [2021-12-17 03:13:50,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 03:13:50,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:50,992 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:13:50,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 03:13:50,993 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:50,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash -2126146282, now seen corresponding path program 1 times [2021-12-17 03:13:50,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:50,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861098954] [2021-12-17 03:13:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:50,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:51,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:13:51,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:51,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861098954] [2021-12-17 03:13:51,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861098954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:51,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:51,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:51,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596483658] [2021-12-17 03:13:51,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:51,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:51,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:51,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:51,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:51,076 INFO L87 Difference]: Start difference. First operand 435 states and 661 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:53,082 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 [] [2021-12-17 03:13:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:53,305 INFO L93 Difference]: Finished difference Result 884 states and 1344 transitions. [2021-12-17 03:13:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-12-17 03:13:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:53,307 INFO L225 Difference]: With dead ends: 884 [2021-12-17 03:13:53,307 INFO L226 Difference]: Without dead ends: 470 [2021-12-17 03:13:53,308 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 [2021-12-17 03:13:53,308 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 63 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:53,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 477 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:53,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-17 03:13:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 435. [2021-12-17 03:13:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 1.5207373271889402) internal successors, (660), 434 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 660 transitions. [2021-12-17 03:13:53,339 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 660 transitions. Word has length 138 [2021-12-17 03:13:53,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:53,339 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 660 transitions. [2021-12-17 03:13:53,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 660 transitions. [2021-12-17 03:13:53,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 03:13:53,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:53,341 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:53,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 03:13:53,341 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:53,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:53,342 INFO L85 PathProgramCache]: Analyzing trace with hash -589868265, now seen corresponding path program 1 times [2021-12-17 03:13:53,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:53,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455460060] [2021-12-17 03:13:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:53,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:13:53,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:53,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455460060] [2021-12-17 03:13:53,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455460060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:53,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:53,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:53,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272831244] [2021-12-17 03:13:53,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:53,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:53,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:53,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:53,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:53,420 INFO L87 Difference]: Start difference. First operand 435 states and 660 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:53,959 INFO L93 Difference]: Finished difference Result 948 states and 1440 transitions. [2021-12-17 03:13:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:53,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-12-17 03:13:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:53,961 INFO L225 Difference]: With dead ends: 948 [2021-12-17 03:13:53,961 INFO L226 Difference]: Without dead ends: 534 [2021-12-17 03:13:53,962 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 [2021-12-17 03:13:53,962 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 100 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:53,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 356 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:13:53,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-12-17 03:13:53,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 465. [2021-12-17 03:13:53,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.519396551724138) internal successors, (705), 464 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 705 transitions. [2021-12-17 03:13:53,972 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 705 transitions. Word has length 138 [2021-12-17 03:13:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:53,972 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 705 transitions. [2021-12-17 03:13:53,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:53,972 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 705 transitions. [2021-12-17 03:13:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 03:13:53,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:53,973 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:53,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 03:13:53,973 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash 984886832, now seen corresponding path program 1 times [2021-12-17 03:13:53,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:53,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841399229] [2021-12-17 03:13:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:53,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:13:54,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:54,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841399229] [2021-12-17 03:13:54,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841399229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:54,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:54,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:54,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511245309] [2021-12-17 03:13:54,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:54,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:54,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:54,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:54,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:54,066 INFO L87 Difference]: Start difference. First operand 465 states and 705 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:56,072 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 [] [2021-12-17 03:13:56,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:56,307 INFO L93 Difference]: Finished difference Result 968 states and 1466 transitions. [2021-12-17 03:13:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:56,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-12-17 03:13:56,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:56,309 INFO L225 Difference]: With dead ends: 968 [2021-12-17 03:13:56,309 INFO L226 Difference]: Without dead ends: 524 [2021-12-17 03:13:56,310 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 [2021-12-17 03:13:56,310 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 107 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 50 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:56,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 354 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:13:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-12-17 03:13:56,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 465. [2021-12-17 03:13:56,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 1.5064655172413792) internal successors, (699), 464 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:56,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 699 transitions. [2021-12-17 03:13:56,336 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 699 transitions. Word has length 139 [2021-12-17 03:13:56,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:56,336 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 699 transitions. [2021-12-17 03:13:56,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:56,336 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 699 transitions. [2021-12-17 03:13:56,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 03:13:56,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:56,337 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:56,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 03:13:56,338 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:56,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1970724841, now seen corresponding path program 1 times [2021-12-17 03:13:56,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:56,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049798324] [2021-12-17 03:13:56,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:56,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:13:56,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049798324] [2021-12-17 03:13:56,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049798324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:56,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:56,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:56,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808334593] [2021-12-17 03:13:56,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:56,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:56,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:56,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:56,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:56,411 INFO L87 Difference]: Start difference. First operand 465 states and 699 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:58,416 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 [] [2021-12-17 03:13:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:13:58,698 INFO L93 Difference]: Finished difference Result 1010 states and 1518 transitions. [2021-12-17 03:13:58,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:13:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-12-17 03:13:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:13:58,700 INFO L225 Difference]: With dead ends: 1010 [2021-12-17 03:13:58,700 INFO L226 Difference]: Without dead ends: 566 [2021-12-17 03:13:58,700 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 [2021-12-17 03:13:58,701 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 109 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:13:58,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 354 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:13:58,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-12-17 03:13:58,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 493. [2021-12-17 03:13:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.4939024390243902) internal successors, (735), 492 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 735 transitions. [2021-12-17 03:13:58,707 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 735 transitions. Word has length 141 [2021-12-17 03:13:58,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:13:58,707 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 735 transitions. [2021-12-17 03:13:58,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:13:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 735 transitions. [2021-12-17 03:13:58,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:13:58,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:13:58,708 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:13:58,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 03:13:58,709 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:13:58,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:13:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash 155364701, now seen corresponding path program 1 times [2021-12-17 03:13:58,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:13:58,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281805882] [2021-12-17 03:13:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:13:58,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:13:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:13:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-17 03:13:58,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:13:58,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281805882] [2021-12-17 03:13:58,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281805882] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:13:58,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:13:58,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:13:58,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328894340] [2021-12-17 03:13:58,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:13:58,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:13:58,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:13:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:13:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:13:58,790 INFO L87 Difference]: Start difference. First operand 493 states and 735 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:00,796 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 [] [2021-12-17 03:14:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:01,057 INFO L93 Difference]: Finished difference Result 1024 states and 1526 transitions. [2021-12-17 03:14:01,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:01,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-17 03:14:01,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:01,059 INFO L225 Difference]: With dead ends: 1024 [2021-12-17 03:14:01,059 INFO L226 Difference]: Without dead ends: 552 [2021-12-17 03:14:01,059 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 [2021-12-17 03:14:01,060 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 108 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:01,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 338 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:14:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-12-17 03:14:01,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 493. [2021-12-17 03:14:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 1.4796747967479675) internal successors, (728), 492 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 728 transitions. [2021-12-17 03:14:01,066 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 728 transitions. Word has length 142 [2021-12-17 03:14:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:01,066 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 728 transitions. [2021-12-17 03:14:01,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 728 transitions. [2021-12-17 03:14:01,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-17 03:14:01,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:01,068 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:14:01,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 03:14:01,068 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:01,069 INFO L85 PathProgramCache]: Analyzing trace with hash 436551973, now seen corresponding path program 1 times [2021-12-17 03:14:01,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:01,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47256274] [2021-12-17 03:14:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:01,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:14:01,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:01,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47256274] [2021-12-17 03:14:01,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47256274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:01,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:01,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:14:01,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107346766] [2021-12-17 03:14:01,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:01,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:14:01,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:01,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:14:01,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:14:01,143 INFO L87 Difference]: Start difference. First operand 493 states and 728 transitions. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:03,151 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 [] [2021-12-17 03:14:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:03,344 INFO L93 Difference]: Finished difference Result 997 states and 1474 transitions. [2021-12-17 03:14:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-12-17 03:14:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:03,346 INFO L225 Difference]: With dead ends: 997 [2021-12-17 03:14:03,346 INFO L226 Difference]: Without dead ends: 525 [2021-12-17 03:14:03,347 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 [2021-12-17 03:14:03,347 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 44 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:03,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 497 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:14:03,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-17 03:14:03,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 498. [2021-12-17 03:14:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 1.4788732394366197) internal successors, (735), 497 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 735 transitions. [2021-12-17 03:14:03,354 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 735 transitions. Word has length 148 [2021-12-17 03:14:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:03,354 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 735 transitions. [2021-12-17 03:14:03,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:03,354 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 735 transitions. [2021-12-17 03:14:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-17 03:14:03,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:03,355 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:14:03,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 03:14:03,356 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:03,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:03,356 INFO L85 PathProgramCache]: Analyzing trace with hash -2111739750, now seen corresponding path program 1 times [2021-12-17 03:14:03,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:03,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953409068] [2021-12-17 03:14:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:03,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:14:03,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:03,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953409068] [2021-12-17 03:14:03,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953409068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:03,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:03,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:14:03,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088864309] [2021-12-17 03:14:03,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:03,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:14:03,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:03,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:14:03,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:14:03,434 INFO L87 Difference]: Start difference. First operand 498 states and 735 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:05,439 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 [] [2021-12-17 03:14:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:05,626 INFO L93 Difference]: Finished difference Result 1000 states and 1478 transitions. [2021-12-17 03:14:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:05,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 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 149 [2021-12-17 03:14:05,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:05,628 INFO L225 Difference]: With dead ends: 1000 [2021-12-17 03:14:05,628 INFO L226 Difference]: Without dead ends: 523 [2021-12-17 03:14:05,628 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 [2021-12-17 03:14:05,629 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 41 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:05,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 499 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:14:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-12-17 03:14:05,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 499. [2021-12-17 03:14:05,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 1.4779116465863453) internal successors, (736), 498 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:05,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 736 transitions. [2021-12-17 03:14:05,654 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 736 transitions. Word has length 149 [2021-12-17 03:14:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:05,654 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 736 transitions. [2021-12-17 03:14:05,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 736 transitions. [2021-12-17 03:14:05,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-17 03:14:05,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:05,655 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 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] [2021-12-17 03:14:05,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 03:14:05,656 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:05,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:05,656 INFO L85 PathProgramCache]: Analyzing trace with hash -642872111, now seen corresponding path program 1 times [2021-12-17 03:14:05,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:05,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801634264] [2021-12-17 03:14:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:05,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-17 03:14:05,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801634264] [2021-12-17 03:14:05,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801634264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:05,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:05,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:14:05,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382513880] [2021-12-17 03:14:05,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:05,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:14:05,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:05,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:14:05,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:14:05,744 INFO L87 Difference]: Start difference. First operand 499 states and 736 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:07,749 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 [] [2021-12-17 03:14:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:08,001 INFO L93 Difference]: Finished difference Result 1076 states and 1588 transitions. [2021-12-17 03:14:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 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 160 [2021-12-17 03:14:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:08,004 INFO L225 Difference]: With dead ends: 1076 [2021-12-17 03:14:08,004 INFO L226 Difference]: Without dead ends: 598 [2021-12-17 03:14:08,006 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 [2021-12-17 03:14:08,006 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 105 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:08,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 340 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:14:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-12-17 03:14:08,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 529. [2021-12-17 03:14:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 1.4678030303030303) internal successors, (775), 528 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 775 transitions. [2021-12-17 03:14:08,015 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 775 transitions. Word has length 160 [2021-12-17 03:14:08,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:08,015 INFO L470 AbstractCegarLoop]: Abstraction has 529 states and 775 transitions. [2021-12-17 03:14:08,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 775 transitions. [2021-12-17 03:14:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 03:14:08,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:08,017 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:14:08,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 03:14:08,017 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:08,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:08,018 INFO L85 PathProgramCache]: Analyzing trace with hash 138370680, now seen corresponding path program 1 times [2021-12-17 03:14:08,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:08,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255251414] [2021-12-17 03:14:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:08,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-17 03:14:08,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:08,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255251414] [2021-12-17 03:14:08,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255251414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:08,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:08,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:14:08,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923996232] [2021-12-17 03:14:08,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:08,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:14:08,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:14:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:14:08,103 INFO L87 Difference]: Start difference. First operand 529 states and 775 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:08,147 INFO L93 Difference]: Finished difference Result 1539 states and 2269 transitions. [2021-12-17 03:14:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:14:08,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-12-17 03:14:08,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:08,159 INFO L225 Difference]: With dead ends: 1539 [2021-12-17 03:14:08,159 INFO L226 Difference]: Without dead ends: 1031 [2021-12-17 03:14:08,159 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 [2021-12-17 03:14:08,160 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 139 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:08,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 557 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:14:08,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-12-17 03:14:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 1031. [2021-12-17 03:14:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 1.4679611650485438) internal successors, (1512), 1030 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1512 transitions. [2021-12-17 03:14:08,195 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1512 transitions. Word has length 166 [2021-12-17 03:14:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:08,195 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 1512 transitions. [2021-12-17 03:14:08,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1512 transitions. [2021-12-17 03:14:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-12-17 03:14:08,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:08,197 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:14:08,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 03:14:08,197 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:08,198 INFO L85 PathProgramCache]: Analyzing trace with hash 234885032, now seen corresponding path program 1 times [2021-12-17 03:14:08,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:08,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148207585] [2021-12-17 03:14:08,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:08,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:08,270 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 160 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:14:08,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:08,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148207585] [2021-12-17 03:14:08,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148207585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:08,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:08,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:14:08,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129776434] [2021-12-17 03:14:08,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:08,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:14:08,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:08,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:14:08,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:14:08,273 INFO L87 Difference]: Start difference. First operand 1031 states and 1512 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:08,305 INFO L93 Difference]: Finished difference Result 2508 states and 3690 transitions. [2021-12-17 03:14:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:14:08,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 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 167 [2021-12-17 03:14:08,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:08,309 INFO L225 Difference]: With dead ends: 2508 [2021-12-17 03:14:08,309 INFO L226 Difference]: Without dead ends: 1498 [2021-12-17 03:14:08,310 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 [2021-12-17 03:14:08,312 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 132 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:08,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 555 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:14:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-12-17 03:14:08,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1496. [2021-12-17 03:14:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 1.4688963210702342) internal successors, (2196), 1495 states have internal predecessors, (2196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2196 transitions. [2021-12-17 03:14:08,330 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2196 transitions. Word has length 167 [2021-12-17 03:14:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:08,331 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 2196 transitions. [2021-12-17 03:14:08,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2196 transitions. [2021-12-17 03:14:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 03:14:08,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:08,333 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:14:08,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 03:14:08,333 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:08,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:08,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1802673043, now seen corresponding path program 1 times [2021-12-17 03:14:08,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:08,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84651657] [2021-12-17 03:14:08,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:08,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-17 03:14:08,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:08,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84651657] [2021-12-17 03:14:08,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84651657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:08,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:08,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:14:08,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806613598] [2021-12-17 03:14:08,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:08,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:14:08,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:08,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:14:08,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:14:08,402 INFO L87 Difference]: Start difference. First operand 1496 states and 2196 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:08,458 INFO L93 Difference]: Finished difference Result 3429 states and 5045 transitions. [2021-12-17 03:14:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:14:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 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 168 [2021-12-17 03:14:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:08,463 INFO L225 Difference]: With dead ends: 3429 [2021-12-17 03:14:08,463 INFO L226 Difference]: Without dead ends: 1954 [2021-12-17 03:14:08,464 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 [2021-12-17 03:14:08,465 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 134 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:08,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 435 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:14:08,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2021-12-17 03:14:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1950. [2021-12-17 03:14:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 1.469984607491021) internal successors, (2865), 1949 states have internal predecessors, (2865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 2865 transitions. [2021-12-17 03:14:08,492 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 2865 transitions. Word has length 168 [2021-12-17 03:14:08,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:08,492 INFO L470 AbstractCegarLoop]: Abstraction has 1950 states and 2865 transitions. [2021-12-17 03:14:08,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 2865 transitions. [2021-12-17 03:14:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 03:14:08,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:08,495 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:14:08,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 03:14:08,495 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:08,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:08,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1368167445, now seen corresponding path program 1 times [2021-12-17 03:14:08,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:08,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926409054] [2021-12-17 03:14:08,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:08,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 03:14:08,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:08,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926409054] [2021-12-17 03:14:08,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926409054] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:08,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:08,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:14:08,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126099995] [2021-12-17 03:14:08,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:08,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:14:08,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:08,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:14:08,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:14:08,568 INFO L87 Difference]: Start difference. First operand 1950 states and 2865 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:08,604 INFO L93 Difference]: Finished difference Result 3906 states and 5742 transitions. [2021-12-17 03:14:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:14:08,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2021-12-17 03:14:08,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:08,609 INFO L225 Difference]: With dead ends: 3906 [2021-12-17 03:14:08,610 INFO L226 Difference]: Without dead ends: 1977 [2021-12-17 03:14:08,611 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 [2021-12-17 03:14:08,612 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:08,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 404 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:14:08,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1977 states. [2021-12-17 03:14:08,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1977 to 1977. [2021-12-17 03:14:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1976 states have (on average 1.4676113360323886) internal successors, (2900), 1976 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2900 transitions. [2021-12-17 03:14:08,639 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2900 transitions. Word has length 168 [2021-12-17 03:14:08,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:08,640 INFO L470 AbstractCegarLoop]: Abstraction has 1977 states and 2900 transitions. [2021-12-17 03:14:08,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2900 transitions. [2021-12-17 03:14:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 03:14:08,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:08,643 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:14:08,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 03:14:08,643 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:08,643 INFO L85 PathProgramCache]: Analyzing trace with hash -995674217, now seen corresponding path program 1 times [2021-12-17 03:14:08,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:08,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393937333] [2021-12-17 03:14:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:08,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-17 03:14:08,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393937333] [2021-12-17 03:14:08,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393937333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:08,733 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:08,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:14:08,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101302964] [2021-12-17 03:14:08,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:08,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:14:08,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:08,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:14:08,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:14:08,736 INFO L87 Difference]: Start difference. First operand 1977 states and 2900 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) [2021-12-17 03:14:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:08,761 INFO L93 Difference]: Finished difference Result 3935 states and 5778 transitions. [2021-12-17 03:14:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:14:08,761 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 168 [2021-12-17 03:14:08,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:08,766 INFO L225 Difference]: With dead ends: 3935 [2021-12-17 03:14:08,766 INFO L226 Difference]: Without dead ends: 1979 [2021-12-17 03:14:08,768 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 [2021-12-17 03:14:08,768 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:08,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 383 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:14:08,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-12-17 03:14:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1979. [2021-12-17 03:14:08,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 1.4671385237613752) internal successors, (2902), 1978 states have internal predecessors, (2902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 2902 transitions. [2021-12-17 03:14:08,790 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 2902 transitions. Word has length 168 [2021-12-17 03:14:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:08,791 INFO L470 AbstractCegarLoop]: Abstraction has 1979 states and 2902 transitions. [2021-12-17 03:14:08,791 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) [2021-12-17 03:14:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 2902 transitions. [2021-12-17 03:14:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-17 03:14:08,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:08,793 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:14:08,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 03:14:08,793 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:08,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1874909559, now seen corresponding path program 1 times [2021-12-17 03:14:08,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:08,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368259236] [2021-12-17 03:14:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:08,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 03:14:08,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368259236] [2021-12-17 03:14:08,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368259236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:08,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:08,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:14:08,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681821751] [2021-12-17 03:14:08,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:08,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:14:08,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:08,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:14:08,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:14:08,886 INFO L87 Difference]: Start difference. First operand 1979 states and 2902 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:10,891 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 [] [2021-12-17 03:14:11,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:11,167 INFO L93 Difference]: Finished difference Result 4032 states and 5896 transitions. [2021-12-17 03:14:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-12-17 03:14:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:11,172 INFO L225 Difference]: With dead ends: 4032 [2021-12-17 03:14:11,172 INFO L226 Difference]: Without dead ends: 2076 [2021-12-17 03:14:11,173 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 [2021-12-17 03:14:11,174 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 50 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:11,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 497 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:14:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2076 states. [2021-12-17 03:14:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2076 to 1979. [2021-12-17 03:14:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 1.4651162790697674) internal successors, (2898), 1978 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 2898 transitions. [2021-12-17 03:14:11,204 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 2898 transitions. Word has length 169 [2021-12-17 03:14:11,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:11,205 INFO L470 AbstractCegarLoop]: Abstraction has 1979 states and 2898 transitions. [2021-12-17 03:14:11,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 2898 transitions. [2021-12-17 03:14:11,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-17 03:14:11,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:11,207 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:14:11,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 03:14:11,207 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:11,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:11,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1096076143, now seen corresponding path program 1 times [2021-12-17 03:14:11,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:11,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951212384] [2021-12-17 03:14:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:11,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-17 03:14:11,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:11,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951212384] [2021-12-17 03:14:11,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951212384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:11,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:11,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:14:11,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402160218] [2021-12-17 03:14:11,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:11,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:14:11,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:11,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:14:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:14:11,285 INFO L87 Difference]: Start difference. First operand 1979 states and 2898 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:13,290 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 [] [2021-12-17 03:14:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:13,555 INFO L93 Difference]: Finished difference Result 4024 states and 5876 transitions. [2021-12-17 03:14:13,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:13,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-12-17 03:14:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:13,560 INFO L225 Difference]: With dead ends: 4024 [2021-12-17 03:14:13,560 INFO L226 Difference]: Without dead ends: 2068 [2021-12-17 03:14:13,562 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 [2021-12-17 03:14:13,562 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 47 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:13,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 503 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:14:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-12-17 03:14:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1979. [2021-12-17 03:14:13,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 1.4630940343781598) internal successors, (2894), 1978 states have internal predecessors, (2894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 2894 transitions. [2021-12-17 03:14:13,587 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 2894 transitions. Word has length 170 [2021-12-17 03:14:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:13,588 INFO L470 AbstractCegarLoop]: Abstraction has 1979 states and 2894 transitions. [2021-12-17 03:14:13,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 2894 transitions. [2021-12-17 03:14:13,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-17 03:14:13,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:13,590 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-17 03:14:13,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 03:14:13,590 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:13,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2079591200, now seen corresponding path program 1 times [2021-12-17 03:14:13,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:13,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090114972] [2021-12-17 03:14:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:13,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 201 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 03:14:13,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:13,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090114972] [2021-12-17 03:14:13,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090114972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:13,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:13,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:14:13,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732275408] [2021-12-17 03:14:13,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:13,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:14:13,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:13,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:14:13,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:14:13,676 INFO L87 Difference]: Start difference. First operand 1979 states and 2894 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:15,681 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 [] [2021-12-17 03:14:15,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:15,961 INFO L93 Difference]: Finished difference Result 4320 states and 6295 transitions. [2021-12-17 03:14:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:15,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 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 170 [2021-12-17 03:14:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:15,973 INFO L225 Difference]: With dead ends: 4320 [2021-12-17 03:14:15,973 INFO L226 Difference]: Without dead ends: 2364 [2021-12-17 03:14:15,980 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 [2021-12-17 03:14:15,980 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 101 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:15,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 342 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:14:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-12-17 03:14:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2119. [2021-12-17 03:14:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 1.4575070821529745) internal successors, (3087), 2118 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3087 transitions. [2021-12-17 03:14:16,013 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3087 transitions. Word has length 170 [2021-12-17 03:14:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:16,013 INFO L470 AbstractCegarLoop]: Abstraction has 2119 states and 3087 transitions. [2021-12-17 03:14:16,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3087 transitions. [2021-12-17 03:14:16,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-17 03:14:16,016 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:16,016 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:14:16,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 03:14:16,016 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:16,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1577836031, now seen corresponding path program 1 times [2021-12-17 03:14:16,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:16,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691324804] [2021-12-17 03:14:16,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:16,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-17 03:14:16,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:16,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691324804] [2021-12-17 03:14:16,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691324804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:16,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:16,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:14:16,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890166990] [2021-12-17 03:14:16,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:16,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:14:16,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:16,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:14:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:14:16,129 INFO L87 Difference]: Start difference. First operand 2119 states and 3087 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:18,143 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 [] [2021-12-17 03:14:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:18,333 INFO L93 Difference]: Finished difference Result 4372 states and 6370 transitions. [2021-12-17 03:14:18,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-12-17 03:14:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:18,337 INFO L225 Difference]: With dead ends: 4372 [2021-12-17 03:14:18,338 INFO L226 Difference]: Without dead ends: 2276 [2021-12-17 03:14:18,339 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 [2021-12-17 03:14:18,341 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 28 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:18,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 550 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:14:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2276 states. [2021-12-17 03:14:18,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2276 to 2223. [2021-12-17 03:14:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.4576957695769577) internal successors, (3239), 2222 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:18,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3239 transitions. [2021-12-17 03:14:18,397 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3239 transitions. Word has length 171 [2021-12-17 03:14:18,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:18,411 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3239 transitions. [2021-12-17 03:14:18,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:18,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3239 transitions. [2021-12-17 03:14:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-17 03:14:18,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:18,427 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:14:18,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 03:14:18,428 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash -2059634226, now seen corresponding path program 1 times [2021-12-17 03:14:18,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:18,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751967833] [2021-12-17 03:14:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:18,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:18,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-17 03:14:18,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:18,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751967833] [2021-12-17 03:14:18,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751967833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:18,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:18,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:14:18,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391622353] [2021-12-17 03:14:18,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:18,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:14:18,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:18,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:14:18,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:14:18,517 INFO L87 Difference]: Start difference. First operand 2223 states and 3239 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:20,531 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 [] [2021-12-17 03:14:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:20,778 INFO L93 Difference]: Finished difference Result 4512 states and 6558 transitions. [2021-12-17 03:14:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 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 180 [2021-12-17 03:14:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:20,782 INFO L225 Difference]: With dead ends: 4512 [2021-12-17 03:14:20,782 INFO L226 Difference]: Without dead ends: 2312 [2021-12-17 03:14:20,784 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 [2021-12-17 03:14:20,785 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 40 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:20,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 503 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 199 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:14:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2021-12-17 03:14:20,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 2223. [2021-12-17 03:14:20,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.4558955895589558) internal successors, (3235), 2222 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:20,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3235 transitions. [2021-12-17 03:14:20,811 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3235 transitions. Word has length 180 [2021-12-17 03:14:20,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:20,811 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3235 transitions. [2021-12-17 03:14:20,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3235 transitions. [2021-12-17 03:14:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-12-17 03:14:20,813 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:20,814 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:14:20,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 03:14:20,814 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:20,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:20,814 INFO L85 PathProgramCache]: Analyzing trace with hash 2057263587, now seen corresponding path program 1 times [2021-12-17 03:14:20,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:20,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124982698] [2021-12-17 03:14:20,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:20,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-17 03:14:20,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:20,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124982698] [2021-12-17 03:14:20,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124982698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:20,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:20,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:14:20,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573152986] [2021-12-17 03:14:20,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:20,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:14:20,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:14:20,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:14:20,902 INFO L87 Difference]: Start difference. First operand 2223 states and 3235 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:22,915 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 [] [2021-12-17 03:14:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:23,219 INFO L93 Difference]: Finished difference Result 4640 states and 6733 transitions. [2021-12-17 03:14:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:23,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-12-17 03:14:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:23,225 INFO L225 Difference]: With dead ends: 4640 [2021-12-17 03:14:23,225 INFO L226 Difference]: Without dead ends: 2440 [2021-12-17 03:14:23,227 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 [2021-12-17 03:14:23,228 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 102 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:23,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 342 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 241 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:14:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2021-12-17 03:14:23,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 2223. [2021-12-17 03:14:23,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.4455445544554455) internal successors, (3212), 2222 states have internal predecessors, (3212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3212 transitions. [2021-12-17 03:14:23,294 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3212 transitions. Word has length 181 [2021-12-17 03:14:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:23,296 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3212 transitions. [2021-12-17 03:14:23,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:23,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3212 transitions. [2021-12-17 03:14:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-17 03:14:23,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:23,298 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-17 03:14:23,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 03:14:23,299 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:23,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1372068781, now seen corresponding path program 1 times [2021-12-17 03:14:23,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:23,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495281539] [2021-12-17 03:14:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:23,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:23,379 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 243 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-17 03:14:23,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:23,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495281539] [2021-12-17 03:14:23,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495281539] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:23,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:23,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:14:23,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655134092] [2021-12-17 03:14:23,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:23,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:14:23,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:23,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:14:23,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:14:23,381 INFO L87 Difference]: Start difference. First operand 2223 states and 3212 transitions. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:25,387 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 [] [2021-12-17 03:14:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:25,618 INFO L93 Difference]: Finished difference Result 4490 states and 6481 transitions. [2021-12-17 03:14:25,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:14:25,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-12-17 03:14:25,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:25,622 INFO L225 Difference]: With dead ends: 4490 [2021-12-17 03:14:25,622 INFO L226 Difference]: Without dead ends: 2290 [2021-12-17 03:14:25,624 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 [2021-12-17 03:14:25,624 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 48 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:25,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 558 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:14:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2021-12-17 03:14:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 2223. [2021-12-17 03:14:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.4441944194419443) internal successors, (3209), 2222 states have internal predecessors, (3209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3209 transitions. [2021-12-17 03:14:25,676 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3209 transitions. Word has length 190 [2021-12-17 03:14:25,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:25,676 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3209 transitions. [2021-12-17 03:14:25,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3209 transitions. [2021-12-17 03:14:25,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-17 03:14:25,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:25,680 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:14:25,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 03:14:25,681 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:25,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash 867563374, now seen corresponding path program 1 times [2021-12-17 03:14:25,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:25,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757088929] [2021-12-17 03:14:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:25,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-12-17 03:14:26,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:26,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757088929] [2021-12-17 03:14:26,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757088929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:14:26,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:14:26,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:14:26,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509896987] [2021-12-17 03:14:26,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:14:26,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:14:26,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:14:26,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:14:26,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:14:26,018 INFO L87 Difference]: Start difference. First operand 2223 states and 3209 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:28,026 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 [] [2021-12-17 03:14:30,047 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 [] [2021-12-17 03:14:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:14:30,328 INFO L93 Difference]: Finished difference Result 4443 states and 6414 transitions. [2021-12-17 03:14:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:14:30,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-12-17 03:14:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:14:30,332 INFO L225 Difference]: With dead ends: 4443 [2021-12-17 03:14:30,332 INFO L226 Difference]: Without dead ends: 2223 [2021-12-17 03:14:30,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:14:30,334 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 7 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:14:30,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 647 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-17 03:14:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2223 states. [2021-12-17 03:14:30,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2223 to 2223. [2021-12-17 03:14:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 1.4437443744374436) internal successors, (3208), 2222 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3208 transitions. [2021-12-17 03:14:30,363 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3208 transitions. Word has length 191 [2021-12-17 03:14:30,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:14:30,363 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 3208 transitions. [2021-12-17 03:14:30,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:14:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3208 transitions. [2021-12-17 03:14:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-12-17 03:14:30,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:14:30,366 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:14:30,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 03:14:30,367 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:14:30,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:14:30,367 INFO L85 PathProgramCache]: Analyzing trace with hash 990845040, now seen corresponding path program 1 times [2021-12-17 03:14:30,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:14:30,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624690251] [2021-12-17 03:14:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:30,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:14:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-17 03:14:31,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:14:31,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624690251] [2021-12-17 03:14:31,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624690251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:14:31,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834930465] [2021-12-17 03:14:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:14:31,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:14:31,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:14:31,328 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 03:14:31,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 03:14:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:14:32,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1224 conjuncts, 170 conjunts are in the unsatisfiable core [2021-12-17 03:14:32,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:14:32,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31356 treesize of output 29252 [2021-12-17 03:14:32,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27878 treesize of output 19710 [2021-12-17 03:14:32,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 16 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8762 treesize of output 8781 [2021-12-17 03:14:32,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5666 treesize of output 5685 [2021-12-17 03:14:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:14:32,832 INFO L354 Elim1Store]: treesize reduction 138, result has 16.9 percent of original size [2021-12-17 03:14:32,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 6711 treesize of output 2568 [2021-12-17 03:14:32,842 INFO L190 IndexEqualityManager]: detected not equals via solver Killed by 15