./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.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.16.i.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 03:23:14,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 03:23:14,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 03:23:14,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 03:23:14,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 03:23:14,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 03:23:14,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 03:23:14,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 03:23:14,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 03:23:14,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 03:23:14,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 03:23:14,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 03:23:14,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 03:23:14,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 03:23:14,492 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 03:23:14,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 03:23:14,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 03:23:14,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 03:23:14,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 03:23:14,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 03:23:14,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 03:23:14,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 03:23:14,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 03:23:14,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 03:23:14,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 03:23:14,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 03:23:14,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 03:23:14,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 03:23:14,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 03:23:14,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 03:23:14,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 03:23:14,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 03:23:14,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 03:23:14,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 03:23:14,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 03:23:14,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 03:23:14,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 03:23:14,517 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 03:23:14,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 03:23:14,518 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 03:23:14,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 03:23:14,519 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 03:23:14,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 03:23:14,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 03:23:14,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 03:23:14,548 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 03:23:14,549 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 03:23:14,549 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 03:23:14,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 03:23:14,550 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 03:23:14,550 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 03:23:14,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 03:23:14,551 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 03:23:14,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 03:23:14,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 03:23:14,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 03:23:14,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 03:23:14,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 03:23:14,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 03:23:14,552 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 03:23:14,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 03:23:14,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 03:23:14,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 03:23:14,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 03:23:14,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 03:23:14,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 03:23:14,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:23:14,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 03:23:14,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 03:23:14,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 03:23:14,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 03:23:14,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 03:23:14,555 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 03:23:14,555 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 03:23:14,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 03:23:14,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 03:23:14,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b79f6e49ac032444452c6675a01007f08f3b698920d88701561807a0669494d [2021-12-17 03:23:14,747 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 03:23:14,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 03:23:14,772 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 03:23:14,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 03:23:14,773 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 03:23:14,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-12-17 03:23:14,818 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/874c9fd13/e452efdd286b417f9f0e8042b5666ba6/FLAG62a68010f [2021-12-17 03:23:15,255 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 03:23:15,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.16.i.cil-1.c [2021-12-17 03:23:15,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/874c9fd13/e452efdd286b417f9f0e8042b5666ba6/FLAG62a68010f [2021-12-17 03:23:15,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/874c9fd13/e452efdd286b417f9f0e8042b5666ba6 [2021-12-17 03:23:15,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 03:23:15,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 03:23:15,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 03:23:15,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 03:23:15,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 03:23:15,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:23:15" (1/1) ... [2021-12-17 03:23:15,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54702fdc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:15, skipping insertion in model container [2021-12-17 03:23:15,805 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:23:15" (1/1) ... [2021-12-17 03:23:15,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 03:23:15,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 03:23:16,219 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.16.i.cil-1.c[77378,77391] [2021-12-17 03:23:16,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:23:16,256 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 03:23:16,327 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.16.i.cil-1.c[77378,77391] [2021-12-17 03:23:16,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 03:23:16,339 INFO L208 MainTranslator]: Completed translation [2021-12-17 03:23:16,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16 WrapperNode [2021-12-17 03:23:16,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 03:23:16,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 03:23:16,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 03:23:16,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 03:23:16,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (1/1) ... [2021-12-17 03:23:16,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (1/1) ... [2021-12-17 03:23:16,418 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 809 [2021-12-17 03:23:16,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 03:23:16,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 03:23:16,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 03:23:16,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 03:23:16,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (1/1) ... [2021-12-17 03:23:16,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (1/1) ... [2021-12-17 03:23:16,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (1/1) ... [2021-12-17 03:23:16,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (1/1) ... [2021-12-17 03:23:16,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (1/1) ... [2021-12-17 03:23:16,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (1/1) ... [2021-12-17 03:23:16,499 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (1/1) ... [2021-12-17 03:23:16,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 03:23:16,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 03:23:16,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 03:23:16,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 03:23:16,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (1/1) ... [2021-12-17 03:23:16,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 03:23:16,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:23:16,530 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 03:23:16,564 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 03:23:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 03:23:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 03:23:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 03:23:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 03:23:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 03:23:16,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 03:23:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 03:23:16,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 03:23:16,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 03:23:16,735 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 03:23:16,736 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 03:23:16,755 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 03:23:19,138 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-17 03:23:19,138 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-17 03:23:19,138 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 03:23:19,143 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 03:23:19,143 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 03:23:19,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:23:19 BoogieIcfgContainer [2021-12-17 03:23:19,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 03:23:19,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 03:23:19,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 03:23:19,148 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 03:23:19,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:23:15" (1/3) ... [2021-12-17 03:23:19,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec0d7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:23:19, skipping insertion in model container [2021-12-17 03:23:19,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:23:16" (2/3) ... [2021-12-17 03:23:19,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ec0d7b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:23:19, skipping insertion in model container [2021-12-17 03:23:19,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:23:19" (3/3) ... [2021-12-17 03:23:19,150 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.16.i.cil-1.c [2021-12-17 03:23:19,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 03:23:19,154 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 03:23:19,183 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 03:23:19,187 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 03:23:19,188 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 03:23:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 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 03:23:19,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 03:23:19,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:19,205 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, 1, 1] [2021-12-17 03:23:19,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:19,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:19,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1590777092, now seen corresponding path program 1 times [2021-12-17 03:23:19,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:19,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302706156] [2021-12-17 03:23:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:19,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:19,553 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 03:23:19,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:19,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302706156] [2021-12-17 03:23:19,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302706156] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:19,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:19,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:19,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64930581] [2021-12-17 03:23:19,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:19,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:19,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:19,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:19,577 INFO L87 Difference]: Start difference. First operand has 158 states, 156 states have (on average 1.7307692307692308) internal successors, (270), 157 states have internal predecessors, (270), 0 states have call successors, (0), 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 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:20,206 INFO L93 Difference]: Finished difference Result 341 states and 582 transitions. [2021-12-17 03:23:20,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:20,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-17 03:23:20,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:20,215 INFO L225 Difference]: With dead ends: 341 [2021-12-17 03:23:20,215 INFO L226 Difference]: Without dead ends: 173 [2021-12-17 03:23:20,218 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 03:23:20,221 INFO L933 BasicCegarLoop]: 240 mSDtfsCounter, 36 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:20,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 633 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:23:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-17 03:23:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2021-12-17 03:23:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5806451612903225) internal successors, (245), 155 states have internal predecessors, (245), 0 states have call successors, (0), 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 03:23:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 245 transitions. [2021-12-17 03:23:20,255 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 245 transitions. Word has length 45 [2021-12-17 03:23:20,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:20,255 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 245 transitions. [2021-12-17 03:23:20,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 245 transitions. [2021-12-17 03:23:20,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 03:23:20,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:20,258 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, 1, 1] [2021-12-17 03:23:20,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 03:23:20,258 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:20,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:20,259 INFO L85 PathProgramCache]: Analyzing trace with hash 733994132, now seen corresponding path program 1 times [2021-12-17 03:23:20,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:20,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835915667] [2021-12-17 03:23:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:20,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:20,361 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 03:23:20,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:20,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835915667] [2021-12-17 03:23:20,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835915667] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:20,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:20,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:20,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358579540] [2021-12-17 03:23:20,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:20,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:20,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:20,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:20,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:20,364 INFO L87 Difference]: Start difference. First operand 156 states and 245 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 03:23:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:20,773 INFO L93 Difference]: Finished difference Result 308 states and 478 transitions. [2021-12-17 03:23:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:20,774 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 03:23:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:20,775 INFO L225 Difference]: With dead ends: 308 [2021-12-17 03:23:20,775 INFO L226 Difference]: Without dead ends: 173 [2021-12-17 03:23:20,776 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 03:23:20,777 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 24 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:20,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 519 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:23:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-17 03:23:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2021-12-17 03:23:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.5741935483870968) internal successors, (244), 155 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 03:23:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 244 transitions. [2021-12-17 03:23:20,785 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 244 transitions. Word has length 58 [2021-12-17 03:23:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:20,785 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 244 transitions. [2021-12-17 03:23:20,785 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 03:23:20,786 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 244 transitions. [2021-12-17 03:23:20,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 03:23:20,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:20,787 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, 1, 1] [2021-12-17 03:23:20,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 03:23:20,788 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:20,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1974814043, now seen corresponding path program 1 times [2021-12-17 03:23:20,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:20,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736679096] [2021-12-17 03:23:20,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:20,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:20,887 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 03:23:20,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:20,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736679096] [2021-12-17 03:23:20,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736679096] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:20,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:20,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:20,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539361099] [2021-12-17 03:23:20,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:20,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:20,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:20,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:20,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:20,890 INFO L87 Difference]: Start difference. First operand 156 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 03:23:21,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:21,397 INFO L93 Difference]: Finished difference Result 415 states and 653 transitions. [2021-12-17 03:23:21,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:21,398 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 03:23:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:21,399 INFO L225 Difference]: With dead ends: 415 [2021-12-17 03:23:21,399 INFO L226 Difference]: Without dead ends: 280 [2021-12-17 03:23:21,400 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 03:23:21,401 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 164 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:21,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 380 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:23:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-17 03:23:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2021-12-17 03:23:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.5602409638554218) internal successors, (259), 166 states have internal predecessors, (259), 0 states have call successors, (0), 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 03:23:21,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 259 transitions. [2021-12-17 03:23:21,411 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 259 transitions. Word has length 59 [2021-12-17 03:23:21,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:21,412 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 259 transitions. [2021-12-17 03:23:21,412 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 03:23:21,412 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 259 transitions. [2021-12-17 03:23:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 03:23:21,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:21,418 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, 1, 1] [2021-12-17 03:23:21,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 03:23:21,419 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:21,422 INFO L85 PathProgramCache]: Analyzing trace with hash -87910599, now seen corresponding path program 1 times [2021-12-17 03:23:21,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:21,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275641808] [2021-12-17 03:23:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:21,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:21,523 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 03:23:21,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:21,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275641808] [2021-12-17 03:23:21,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275641808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:21,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:21,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:21,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569324778] [2021-12-17 03:23:21,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:21,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:21,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:21,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:21,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:21,525 INFO L87 Difference]: Start difference. First operand 167 states and 259 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 03:23:22,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:22,015 INFO L93 Difference]: Finished difference Result 426 states and 667 transitions. [2021-12-17 03:23:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:22,016 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 03:23:22,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:22,016 INFO L225 Difference]: With dead ends: 426 [2021-12-17 03:23:22,017 INFO L226 Difference]: Without dead ends: 280 [2021-12-17 03:23:22,017 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 03:23:22,018 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 162 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:22,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 380 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:23:22,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-17 03:23:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 168. [2021-12-17 03:23:22,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.5508982035928143) internal successors, (259), 167 states have internal predecessors, (259), 0 states have call successors, (0), 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 03:23:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 259 transitions. [2021-12-17 03:23:22,024 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 259 transitions. Word has length 59 [2021-12-17 03:23:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:22,025 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 259 transitions. [2021-12-17 03:23:22,025 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 03:23:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 259 transitions. [2021-12-17 03:23:22,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 03:23:22,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:22,026 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, 1, 1] [2021-12-17 03:23:22,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 03:23:22,026 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:22,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:22,027 INFO L85 PathProgramCache]: Analyzing trace with hash -940027376, now seen corresponding path program 1 times [2021-12-17 03:23:22,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:22,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525223172] [2021-12-17 03:23:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:22,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:22,138 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 03:23:22,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:22,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525223172] [2021-12-17 03:23:22,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525223172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:22,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:22,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:22,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528036972] [2021-12-17 03:23:22,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:22,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:22,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:22,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:22,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:22,142 INFO L87 Difference]: Start difference. First operand 168 states and 259 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 03:23:22,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:22,839 INFO L93 Difference]: Finished difference Result 426 states and 665 transitions. [2021-12-17 03:23:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:22,840 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 03:23:22,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:22,840 INFO L225 Difference]: With dead ends: 426 [2021-12-17 03:23:22,841 INFO L226 Difference]: Without dead ends: 279 [2021-12-17 03:23:22,841 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 03:23:22,842 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 155 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:22,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 382 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:23:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-17 03:23:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 174. [2021-12-17 03:23:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.5549132947976878) internal successors, (269), 173 states have internal predecessors, (269), 0 states have call successors, (0), 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 03:23:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 269 transitions. [2021-12-17 03:23:22,861 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 269 transitions. Word has length 59 [2021-12-17 03:23:22,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:22,861 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 269 transitions. [2021-12-17 03:23:22,861 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 03:23:22,862 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 269 transitions. [2021-12-17 03:23:22,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-17 03:23:22,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:22,862 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, 1, 1] [2021-12-17 03:23:22,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 03:23:22,863 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:22,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:22,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1351719632, now seen corresponding path program 1 times [2021-12-17 03:23:22,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:22,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568267878] [2021-12-17 03:23:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:22,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:22,931 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 03:23:22,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:22,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568267878] [2021-12-17 03:23:22,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568267878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:22,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:22,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:22,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457792977] [2021-12-17 03:23:22,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:22,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:22,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:22,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:22,934 INFO L87 Difference]: Start difference. First operand 174 states and 269 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 03:23:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:23,394 INFO L93 Difference]: Finished difference Result 340 states and 526 transitions. [2021-12-17 03:23:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:23,396 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 03:23:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:23,397 INFO L225 Difference]: With dead ends: 340 [2021-12-17 03:23:23,397 INFO L226 Difference]: Without dead ends: 187 [2021-12-17 03:23:23,397 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 03:23:23,397 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 19 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:23,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 527 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:23:23,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-17 03:23:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 174. [2021-12-17 03:23:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.5491329479768785) internal successors, (268), 173 states have internal predecessors, (268), 0 states have call successors, (0), 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 03:23:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 268 transitions. [2021-12-17 03:23:23,401 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 268 transitions. Word has length 59 [2021-12-17 03:23:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:23,402 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 268 transitions. [2021-12-17 03:23:23,402 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 03:23:23,402 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 268 transitions. [2021-12-17 03:23:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 03:23:23,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:23,402 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, 1, 1] [2021-12-17 03:23:23,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 03:23:23,403 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:23,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2100701379, now seen corresponding path program 1 times [2021-12-17 03:23:23,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:23,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277708174] [2021-12-17 03:23:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:23,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:23,479 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 03:23:23,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:23,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277708174] [2021-12-17 03:23:23,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277708174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:23,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:23,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:23,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097564994] [2021-12-17 03:23:23,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:23,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:23,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:23,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:23,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:23,482 INFO L87 Difference]: Start difference. First operand 174 states and 268 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 03:23:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:24,417 INFO L93 Difference]: Finished difference Result 432 states and 673 transitions. [2021-12-17 03:23:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:24,418 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 03:23:24,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:24,419 INFO L225 Difference]: With dead ends: 432 [2021-12-17 03:23:24,419 INFO L226 Difference]: Without dead ends: 279 [2021-12-17 03:23:24,419 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 03:23:24,420 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 159 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:24,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 382 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 03:23:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-17 03:23:24,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 174. [2021-12-17 03:23:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.5375722543352601) internal successors, (266), 173 states have internal predecessors, (266), 0 states have call successors, (0), 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 03:23:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 266 transitions. [2021-12-17 03:23:24,426 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 266 transitions. Word has length 60 [2021-12-17 03:23:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:24,427 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 266 transitions. [2021-12-17 03:23:24,427 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 03:23:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 266 transitions. [2021-12-17 03:23:24,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-17 03:23:24,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:24,429 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, 1, 1] [2021-12-17 03:23:24,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 03:23:24,429 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:24,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:24,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1192056574, now seen corresponding path program 1 times [2021-12-17 03:23:24,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:24,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048500612] [2021-12-17 03:23:24,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:24,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:24,504 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 03:23:24,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048500612] [2021-12-17 03:23:24,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048500612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:24,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:24,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:24,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784540883] [2021-12-17 03:23:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:24,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:24,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:24,507 INFO L87 Difference]: Start difference. First operand 174 states and 266 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 03:23:26,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:26,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:26,467 INFO L93 Difference]: Finished difference Result 340 states and 522 transitions. [2021-12-17 03:23:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:26,467 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 03:23:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:26,468 INFO L225 Difference]: With dead ends: 340 [2021-12-17 03:23:26,468 INFO L226 Difference]: Without dead ends: 187 [2021-12-17 03:23:26,469 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 03:23:26,469 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 20 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:26,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 527 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 03:23:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-17 03:23:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 174. [2021-12-17 03:23:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.5317919075144508) internal successors, (265), 173 states have internal predecessors, (265), 0 states have call successors, (0), 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 03:23:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 265 transitions. [2021-12-17 03:23:26,473 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 265 transitions. Word has length 61 [2021-12-17 03:23:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:26,474 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 265 transitions. [2021-12-17 03:23:26,474 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 03:23:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 265 transitions. [2021-12-17 03:23:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 03:23:26,475 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:26,475 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, 1, 1] [2021-12-17 03:23:26,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 03:23:26,475 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:26,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1453100706, now seen corresponding path program 1 times [2021-12-17 03:23:26,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:26,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046461523] [2021-12-17 03:23:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:26,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:26,546 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 03:23:26,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:26,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046461523] [2021-12-17 03:23:26,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046461523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:26,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:26,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:26,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296413763] [2021-12-17 03:23:26,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:26,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:26,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:26,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:26,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:26,548 INFO L87 Difference]: Start difference. First operand 174 states and 265 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:28,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:28,689 INFO L93 Difference]: Finished difference Result 432 states and 669 transitions. [2021-12-17 03:23:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:28,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-17 03:23:28,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:28,691 INFO L225 Difference]: With dead ends: 432 [2021-12-17 03:23:28,692 INFO L226 Difference]: Without dead ends: 279 [2021-12-17 03:23:28,692 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 03:23:28,692 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 156 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:28,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 382 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 03:23:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-12-17 03:23:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 174. [2021-12-17 03:23:28,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.5202312138728324) internal successors, (263), 173 states have internal predecessors, (263), 0 states have call successors, (0), 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 03:23:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 263 transitions. [2021-12-17 03:23:28,697 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 263 transitions. Word has length 62 [2021-12-17 03:23:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:28,697 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 263 transitions. [2021-12-17 03:23:28,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 263 transitions. [2021-12-17 03:23:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 03:23:28,697 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:28,698 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, 1] [2021-12-17 03:23:28,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 03:23:28,698 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:28,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:28,698 INFO L85 PathProgramCache]: Analyzing trace with hash 841227274, now seen corresponding path program 1 times [2021-12-17 03:23:28,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:28,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465970161] [2021-12-17 03:23:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:28,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:28,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:28,792 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 03:23:28,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:28,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465970161] [2021-12-17 03:23:28,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465970161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:28,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:28,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:28,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424670162] [2021-12-17 03:23:28,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:28,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:28,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:28,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:28,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:28,795 INFO L87 Difference]: Start difference. First operand 174 states and 263 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:29,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:29,409 INFO L93 Difference]: Finished difference Result 451 states and 693 transitions. [2021-12-17 03:23:29,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:29,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-12-17 03:23:29,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:29,410 INFO L225 Difference]: With dead ends: 451 [2021-12-17 03:23:29,411 INFO L226 Difference]: Without dead ends: 298 [2021-12-17 03:23:29,411 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 03:23:29,411 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 132 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:29,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 384 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 03:23:29,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-12-17 03:23:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 214. [2021-12-17 03:23:29,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.5539906103286385) internal successors, (331), 213 states have internal predecessors, (331), 0 states have call successors, (0), 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 03:23:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 331 transitions. [2021-12-17 03:23:29,416 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 331 transitions. Word has length 62 [2021-12-17 03:23:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:29,416 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 331 transitions. [2021-12-17 03:23:29,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 331 transitions. [2021-12-17 03:23:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-17 03:23:29,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:29,417 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, 1, 1] [2021-12-17 03:23:29,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 03:23:29,417 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:29,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1421192685, now seen corresponding path program 1 times [2021-12-17 03:23:29,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:29,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237082327] [2021-12-17 03:23:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:29,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:29,490 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 03:23:29,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:29,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237082327] [2021-12-17 03:23:29,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237082327] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:29,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:29,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:29,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001092185] [2021-12-17 03:23:29,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:29,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:29,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:29,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:29,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:29,492 INFO L87 Difference]: Start difference. First operand 214 states and 331 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:30,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:30,181 INFO L93 Difference]: Finished difference Result 512 states and 802 transitions. [2021-12-17 03:23:30,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:30,182 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-17 03:23:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:30,183 INFO L225 Difference]: With dead ends: 512 [2021-12-17 03:23:30,183 INFO L226 Difference]: Without dead ends: 319 [2021-12-17 03:23:30,183 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 03:23:30,184 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 131 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:30,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 406 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:23:30,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-12-17 03:23:30,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 236. [2021-12-17 03:23:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5914893617021277) internal successors, (374), 235 states have internal predecessors, (374), 0 states have call successors, (0), 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 03:23:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 374 transitions. [2021-12-17 03:23:30,189 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 374 transitions. Word has length 63 [2021-12-17 03:23:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:30,190 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 374 transitions. [2021-12-17 03:23:30,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 374 transitions. [2021-12-17 03:23:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 03:23:30,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:30,191 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, 1, 1] [2021-12-17 03:23:30,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 03:23:30,191 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:30,192 INFO L85 PathProgramCache]: Analyzing trace with hash 890476897, now seen corresponding path program 1 times [2021-12-17 03:23:30,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:30,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053310208] [2021-12-17 03:23:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:30,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:23:30,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:30,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053310208] [2021-12-17 03:23:30,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053310208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:30,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:30,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:30,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622430563] [2021-12-17 03:23:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:30,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:30,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:30,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:30,273 INFO L87 Difference]: Start difference. First operand 236 states and 374 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:32,167 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 03:23:32,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:32,430 INFO L93 Difference]: Finished difference Result 610 states and 976 transitions. [2021-12-17 03:23:32,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:32,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-17 03:23:32,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:32,432 INFO L225 Difference]: With dead ends: 610 [2021-12-17 03:23:32,432 INFO L226 Difference]: Without dead ends: 395 [2021-12-17 03:23:32,432 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 03:23:32,433 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 137 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:32,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 394 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 03:23:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-12-17 03:23:32,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 300. [2021-12-17 03:23:32,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.605351170568562) internal successors, (480), 299 states have internal predecessors, (480), 0 states have call successors, (0), 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 03:23:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 480 transitions. [2021-12-17 03:23:32,439 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 480 transitions. Word has length 91 [2021-12-17 03:23:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:32,439 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 480 transitions. [2021-12-17 03:23:32,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 480 transitions. [2021-12-17 03:23:32,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-17 03:23:32,440 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:32,440 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, 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] [2021-12-17 03:23:32,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 03:23:32,441 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:32,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1642077334, now seen corresponding path program 1 times [2021-12-17 03:23:32,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:32,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901384724] [2021-12-17 03:23:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:32,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:32,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 03:23:32,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:32,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901384724] [2021-12-17 03:23:32,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901384724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:32,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:32,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:32,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30200849] [2021-12-17 03:23:32,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:32,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:32,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:32,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:32,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:32,504 INFO L87 Difference]: Start difference. First operand 300 states and 480 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:33,664 INFO L93 Difference]: Finished difference Result 620 states and 994 transitions. [2021-12-17 03:23:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:33,664 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-17 03:23:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:33,666 INFO L225 Difference]: With dead ends: 620 [2021-12-17 03:23:33,666 INFO L226 Difference]: Without dead ends: 341 [2021-12-17 03:23:33,666 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 03:23:33,667 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 29 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:33,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 543 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 03:23:33,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-12-17 03:23:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 322. [2021-12-17 03:23:33,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 1.5981308411214954) internal successors, (513), 321 states have internal predecessors, (513), 0 states have call successors, (0), 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 03:23:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 513 transitions. [2021-12-17 03:23:33,673 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 513 transitions. Word has length 97 [2021-12-17 03:23:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:33,673 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 513 transitions. [2021-12-17 03:23:33,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 513 transitions. [2021-12-17 03:23:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-17 03:23:33,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:33,674 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, 1, 1] [2021-12-17 03:23:33,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 03:23:33,674 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:33,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1655661403, now seen corresponding path program 1 times [2021-12-17 03:23:33,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:33,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966255689] [2021-12-17 03:23:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:33,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:33,763 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 03:23:33,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:33,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966255689] [2021-12-17 03:23:33,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966255689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:33,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:33,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:33,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40422055] [2021-12-17 03:23:33,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:33,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:33,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:33,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:33,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:33,765 INFO L87 Difference]: Start difference. First operand 322 states and 513 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:34,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:34,300 INFO L93 Difference]: Finished difference Result 746 states and 1189 transitions. [2021-12-17 03:23:34,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:34,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-12-17 03:23:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:34,306 INFO L225 Difference]: With dead ends: 746 [2021-12-17 03:23:34,306 INFO L226 Difference]: Without dead ends: 445 [2021-12-17 03:23:34,307 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 03:23:34,307 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 154 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:34,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 406 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:23:34,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-12-17 03:23:34,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 338. [2021-12-17 03:23:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.57566765578635) internal successors, (531), 337 states have internal predecessors, (531), 0 states have call successors, (0), 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 03:23:34,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 531 transitions. [2021-12-17 03:23:34,315 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 531 transitions. Word has length 104 [2021-12-17 03:23:34,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:34,315 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 531 transitions. [2021-12-17 03:23:34,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:34,315 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 531 transitions. [2021-12-17 03:23:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-12-17 03:23:34,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:34,316 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, 1, 1] [2021-12-17 03:23:34,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 03:23:34,316 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:34,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1222161779, now seen corresponding path program 1 times [2021-12-17 03:23:34,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:34,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468377164] [2021-12-17 03:23:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:34,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:34,385 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 03:23:34,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468377164] [2021-12-17 03:23:34,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468377164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:34,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:34,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:34,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182591680] [2021-12-17 03:23:34,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:34,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:34,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:34,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:34,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:34,388 INFO L87 Difference]: Start difference. First operand 338 states and 531 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 03:23:35,427 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:35,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:35,594 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2021-12-17 03:23:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:35,595 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 03:23:35,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:35,596 INFO L225 Difference]: With dead ends: 672 [2021-12-17 03:23:35,596 INFO L226 Difference]: Without dead ends: 355 [2021-12-17 03:23:35,597 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 03:23:35,597 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 32 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:35,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 547 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 03:23:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-12-17 03:23:35,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 338. [2021-12-17 03:23:35,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.572700296735905) internal successors, (530), 337 states have internal predecessors, (530), 0 states have call successors, (0), 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 03:23:35,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 530 transitions. [2021-12-17 03:23:35,604 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 530 transitions. Word has length 105 [2021-12-17 03:23:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:35,605 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 530 transitions. [2021-12-17 03:23:35,605 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 03:23:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 530 transitions. [2021-12-17 03:23:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 03:23:35,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:35,607 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, 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 03:23:35,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 03:23:35,607 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:35,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1031437272, now seen corresponding path program 1 times [2021-12-17 03:23:35,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:35,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908839801] [2021-12-17 03:23:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:35,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:35,715 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-17 03:23:35,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:35,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908839801] [2021-12-17 03:23:35,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908839801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:35,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:35,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:35,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667205291] [2021-12-17 03:23:35,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:35,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:35,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:35,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:35,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:35,719 INFO L87 Difference]: Start difference. First operand 338 states and 530 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:36,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:36,167 INFO L93 Difference]: Finished difference Result 662 states and 1045 transitions. [2021-12-17 03:23:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:36,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-17 03:23:36,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:36,169 INFO L225 Difference]: With dead ends: 662 [2021-12-17 03:23:36,169 INFO L226 Difference]: Without dead ends: 345 [2021-12-17 03:23:36,170 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 03:23:36,170 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 27 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:36,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 561 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:23:36,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-12-17 03:23:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 338. [2021-12-17 03:23:36,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 1.5697329376854599) internal successors, (529), 337 states have internal predecessors, (529), 0 states have call successors, (0), 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 03:23:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 529 transitions. [2021-12-17 03:23:36,177 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 529 transitions. Word has length 113 [2021-12-17 03:23:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:36,177 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 529 transitions. [2021-12-17 03:23:36,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 529 transitions. [2021-12-17 03:23:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 03:23:36,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:36,179 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, 1, 1, 1] [2021-12-17 03:23:36,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 03:23:36,179 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:36,180 INFO L85 PathProgramCache]: Analyzing trace with hash -674265657, now seen corresponding path program 1 times [2021-12-17 03:23:36,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:36,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971632859] [2021-12-17 03:23:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:36,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:36,272 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 03:23:36,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971632859] [2021-12-17 03:23:36,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971632859] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:36,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:36,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:36,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269764050] [2021-12-17 03:23:36,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:36,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:36,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:36,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:36,274 INFO L87 Difference]: Start difference. First operand 338 states and 529 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 03:23:38,287 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 03:23:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:38,576 INFO L93 Difference]: Finished difference Result 755 states and 1184 transitions. [2021-12-17 03:23:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:38,577 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 119 [2021-12-17 03:23:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:38,578 INFO L225 Difference]: With dead ends: 755 [2021-12-17 03:23:38,578 INFO L226 Difference]: Without dead ends: 438 [2021-12-17 03:23:38,578 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 03:23:38,579 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 90 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:38,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 515 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 253 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:23:38,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-12-17 03:23:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 377. [2021-12-17 03:23:38,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.574468085106383) internal successors, (592), 376 states have internal predecessors, (592), 0 states have call successors, (0), 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 03:23:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 592 transitions. [2021-12-17 03:23:38,585 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 592 transitions. Word has length 119 [2021-12-17 03:23:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:38,585 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 592 transitions. [2021-12-17 03:23:38,585 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 03:23:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 592 transitions. [2021-12-17 03:23:38,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 03:23:38,586 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:38,586 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, 1, 1, 1] [2021-12-17 03:23:38,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 03:23:38,587 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:38,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:38,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1543364741, now seen corresponding path program 1 times [2021-12-17 03:23:38,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:38,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76386476] [2021-12-17 03:23:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:38,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:38,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:38,691 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 03:23:38,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:38,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76386476] [2021-12-17 03:23:38,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76386476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:38,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:38,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:38,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722712610] [2021-12-17 03:23:38,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:38,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:38,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:38,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:38,693 INFO L87 Difference]: Start difference. First operand 377 states and 592 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 03:23:40,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:40,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:40,445 INFO L93 Difference]: Finished difference Result 781 states and 1228 transitions. [2021-12-17 03:23:40,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:40,446 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 119 [2021-12-17 03:23:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:40,447 INFO L225 Difference]: With dead ends: 781 [2021-12-17 03:23:40,447 INFO L226 Difference]: Without dead ends: 425 [2021-12-17 03:23:40,448 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 03:23:40,448 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 36 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:40,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 639 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 03:23:40,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-12-17 03:23:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 401. [2021-12-17 03:23:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.57) internal successors, (628), 400 states have internal predecessors, (628), 0 states have call successors, (0), 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 03:23:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 628 transitions. [2021-12-17 03:23:40,454 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 628 transitions. Word has length 119 [2021-12-17 03:23:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:40,455 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 628 transitions. [2021-12-17 03:23:40,455 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 03:23:40,455 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 628 transitions. [2021-12-17 03:23:40,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 03:23:40,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:40,456 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, 1, 1, 1] [2021-12-17 03:23:40,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 03:23:40,456 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:40,457 INFO L85 PathProgramCache]: Analyzing trace with hash 622163786, now seen corresponding path program 1 times [2021-12-17 03:23:40,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:40,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041402343] [2021-12-17 03:23:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:40,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:40,526 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 03:23:40,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:40,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041402343] [2021-12-17 03:23:40,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041402343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:40,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:40,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:40,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169431567] [2021-12-17 03:23:40,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:40,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:40,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:40,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:40,528 INFO L87 Difference]: Start difference. First operand 401 states and 628 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 03:23:42,539 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 03:23:42,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:42,775 INFO L93 Difference]: Finished difference Result 839 states and 1314 transitions. [2021-12-17 03:23:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:42,776 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 120 [2021-12-17 03:23:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:42,777 INFO L225 Difference]: With dead ends: 839 [2021-12-17 03:23:42,777 INFO L226 Difference]: Without dead ends: 459 [2021-12-17 03:23:42,777 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 03:23:42,778 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 85 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:42,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 509 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:23:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-12-17 03:23:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 402. [2021-12-17 03:23:42,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.56857855361596) internal successors, (629), 401 states have internal predecessors, (629), 0 states have call successors, (0), 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 03:23:42,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 629 transitions. [2021-12-17 03:23:42,784 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 629 transitions. Word has length 120 [2021-12-17 03:23:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:42,784 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 629 transitions. [2021-12-17 03:23:42,784 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 03:23:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 629 transitions. [2021-12-17 03:23:42,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 03:23:42,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:42,785 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, 1] [2021-12-17 03:23:42,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 03:23:42,785 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:42,786 INFO L85 PathProgramCache]: Analyzing trace with hash -370439172, now seen corresponding path program 1 times [2021-12-17 03:23:42,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:42,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591445142] [2021-12-17 03:23:42,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:42,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:42,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:42,946 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 03:23:42,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:42,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591445142] [2021-12-17 03:23:42,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591445142] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:42,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:42,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:42,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180589445] [2021-12-17 03:23:42,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:42,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:42,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:42,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:42,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:42,948 INFO L87 Difference]: Start difference. First operand 402 states and 629 transitions. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:44,584 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 03:23:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:44,851 INFO L93 Difference]: Finished difference Result 906 states and 1420 transitions. [2021-12-17 03:23:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:44,852 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-17 03:23:44,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:44,853 INFO L225 Difference]: With dead ends: 906 [2021-12-17 03:23:44,853 INFO L226 Difference]: Without dead ends: 525 [2021-12-17 03:23:44,854 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 03:23:44,854 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 126 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:44,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 407 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 03:23:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-12-17 03:23:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 445. [2021-12-17 03:23:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.5765765765765767) internal successors, (700), 444 states have internal predecessors, (700), 0 states have call successors, (0), 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 03:23:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 700 transitions. [2021-12-17 03:23:44,861 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 700 transitions. Word has length 127 [2021-12-17 03:23:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:44,862 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 700 transitions. [2021-12-17 03:23:44,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 700 transitions. [2021-12-17 03:23:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 03:23:44,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:44,863 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, 1, 1] [2021-12-17 03:23:44,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 03:23:44,863 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash -51298326, now seen corresponding path program 1 times [2021-12-17 03:23:44,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:44,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064247542] [2021-12-17 03:23:44,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:44,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:44,937 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 03:23:44,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:44,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064247542] [2021-12-17 03:23:44,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064247542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:44,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:44,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:44,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229111048] [2021-12-17 03:23:44,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:44,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:44,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:44,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:44,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:44,939 INFO L87 Difference]: Start difference. First operand 445 states and 700 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:46,946 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 03:23:47,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:47,177 INFO L93 Difference]: Finished difference Result 924 states and 1453 transitions. [2021-12-17 03:23:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:47,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-17 03:23:47,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:47,179 INFO L225 Difference]: With dead ends: 924 [2021-12-17 03:23:47,179 INFO L226 Difference]: Without dead ends: 500 [2021-12-17 03:23:47,180 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 03:23:47,180 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 104 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:47,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 511 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 247 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:23:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-12-17 03:23:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 445. [2021-12-17 03:23:47,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.5743243243243243) internal successors, (699), 444 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 03:23:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 699 transitions. [2021-12-17 03:23:47,218 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 699 transitions. Word has length 127 [2021-12-17 03:23:47,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:47,219 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 699 transitions. [2021-12-17 03:23:47,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 699 transitions. [2021-12-17 03:23:47,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 03:23:47,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:47,220 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, 1, 1] [2021-12-17 03:23:47,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 03:23:47,220 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:47,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:47,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1930429272, now seen corresponding path program 1 times [2021-12-17 03:23:47,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:47,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212319229] [2021-12-17 03:23:47,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:47,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:47,299 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 03:23:47,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:47,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212319229] [2021-12-17 03:23:47,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212319229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:47,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:47,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:47,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039413829] [2021-12-17 03:23:47,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:47,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:47,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:47,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:47,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:47,301 INFO L87 Difference]: Start difference. First operand 445 states and 699 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:49,308 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 03:23:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:49,592 INFO L93 Difference]: Finished difference Result 952 states and 1494 transitions. [2021-12-17 03:23:49,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:49,592 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-12-17 03:23:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:49,594 INFO L225 Difference]: With dead ends: 952 [2021-12-17 03:23:49,594 INFO L226 Difference]: Without dead ends: 528 [2021-12-17 03:23:49,595 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 03:23:49,595 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 153 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:49,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 382 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:23:49,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-12-17 03:23:49,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 445. [2021-12-17 03:23:49,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 1.5608108108108107) internal successors, (693), 444 states have internal predecessors, (693), 0 states have call successors, (0), 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 03:23:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 693 transitions. [2021-12-17 03:23:49,602 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 693 transitions. Word has length 127 [2021-12-17 03:23:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:49,602 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 693 transitions. [2021-12-17 03:23:49,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 693 transitions. [2021-12-17 03:23:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 03:23:49,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:49,603 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, 1, 1] [2021-12-17 03:23:49,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 03:23:49,604 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:49,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:49,604 INFO L85 PathProgramCache]: Analyzing trace with hash 881263711, now seen corresponding path program 1 times [2021-12-17 03:23:49,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:49,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435402935] [2021-12-17 03:23:49,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:49,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:49,678 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 03:23:49,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:49,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435402935] [2021-12-17 03:23:49,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435402935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:49,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:49,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:49,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490044249] [2021-12-17 03:23:49,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:49,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:49,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:49,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:49,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:49,680 INFO L87 Difference]: Start difference. First operand 445 states and 693 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:50,848 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:51,118 INFO L93 Difference]: Finished difference Result 952 states and 1482 transitions. [2021-12-17 03:23:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:51,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-17 03:23:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:51,121 INFO L225 Difference]: With dead ends: 952 [2021-12-17 03:23:51,121 INFO L226 Difference]: Without dead ends: 526 [2021-12-17 03:23:51,121 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 03:23:51,122 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 126 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:51,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 382 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 03:23:51,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-12-17 03:23:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 447. [2021-12-17 03:23:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.5605381165919283) internal successors, (696), 446 states have internal predecessors, (696), 0 states have call successors, (0), 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 03:23:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 696 transitions. [2021-12-17 03:23:51,129 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 696 transitions. Word has length 128 [2021-12-17 03:23:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:51,129 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 696 transitions. [2021-12-17 03:23:51,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:51,130 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 696 transitions. [2021-12-17 03:23:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 03:23:51,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:51,131 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:51,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 03:23:51,132 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:51,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1972974459, now seen corresponding path program 1 times [2021-12-17 03:23:51,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:51,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608080317] [2021-12-17 03:23:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:51,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:51,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-12-17 03:23:51,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:51,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608080317] [2021-12-17 03:23:51,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608080317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:51,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:51,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:23:51,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421632516] [2021-12-17 03:23:51,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:51,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:23:51,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:51,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:23:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:23:51,219 INFO L87 Difference]: Start difference. First operand 447 states and 696 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:53,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:55,246 WARN L534 Checker$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 03:23:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:55,528 INFO L93 Difference]: Finished difference Result 883 states and 1380 transitions. [2021-12-17 03:23:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:23:55,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-17 03:23:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:55,530 INFO L225 Difference]: With dead ends: 883 [2021-12-17 03:23:55,530 INFO L226 Difference]: Without dead ends: 457 [2021-12-17 03:23:55,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 03:23:55,531 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 162 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:55,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 406 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-17 03:23:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-17 03:23:55,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 456. [2021-12-17 03:23:55,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.5538461538461539) internal successors, (707), 455 states have internal predecessors, (707), 0 states have call successors, (0), 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 03:23:55,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 707 transitions. [2021-12-17 03:23:55,538 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 707 transitions. Word has length 135 [2021-12-17 03:23:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:55,538 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 707 transitions. [2021-12-17 03:23:55,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 707 transitions. [2021-12-17 03:23:55,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-17 03:23:55,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:55,540 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:55,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 03:23:55,540 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:55,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:55,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1162373978, now seen corresponding path program 1 times [2021-12-17 03:23:55,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:55,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352810386] [2021-12-17 03:23:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:55,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:23:55,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:55,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352810386] [2021-12-17 03:23:55,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352810386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:55,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:55,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:55,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48438812] [2021-12-17 03:23:55,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:55,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:55,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:55,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:55,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:55,672 INFO L87 Difference]: Start difference. First operand 456 states and 707 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:57,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:57,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:57,866 INFO L93 Difference]: Finished difference Result 929 states and 1443 transitions. [2021-12-17 03:23:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:57,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-17 03:23:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:57,868 INFO L225 Difference]: With dead ends: 929 [2021-12-17 03:23:57,868 INFO L226 Difference]: Without dead ends: 494 [2021-12-17 03:23:57,868 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 03:23:57,869 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 89 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:57,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 531 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:23:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-12-17 03:23:57,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 456. [2021-12-17 03:23:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.5516483516483517) internal successors, (706), 455 states have internal predecessors, (706), 0 states have call successors, (0), 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 03:23:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 706 transitions. [2021-12-17 03:23:57,879 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 706 transitions. Word has length 136 [2021-12-17 03:23:57,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:57,879 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 706 transitions. [2021-12-17 03:23:57,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:57,879 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 706 transitions. [2021-12-17 03:23:57,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-17 03:23:57,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:57,881 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:23:57,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 03:23:57,881 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:57,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash 278864988, now seen corresponding path program 1 times [2021-12-17 03:23:57,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:57,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138925973] [2021-12-17 03:23:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:57,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 03:23:57,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:57,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138925973] [2021-12-17 03:23:57,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138925973] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:57,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:57,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:57,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545339527] [2021-12-17 03:23:57,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:57,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:57,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:57,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:57,967 INFO L87 Difference]: Start difference. First operand 456 states and 706 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:59,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:23:59,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:23:59,525 INFO L93 Difference]: Finished difference Result 903 states and 1404 transitions. [2021-12-17 03:23:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:23:59,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-17 03:23:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:23:59,527 INFO L225 Difference]: With dead ends: 903 [2021-12-17 03:23:59,527 INFO L226 Difference]: Without dead ends: 468 [2021-12-17 03:23:59,528 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 03:23:59,528 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 37 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:23:59,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 625 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-17 03:23:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-12-17 03:23:59,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 456. [2021-12-17 03:23:59,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 1.5494505494505495) internal successors, (705), 455 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 03:23:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 705 transitions. [2021-12-17 03:23:59,534 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 705 transitions. Word has length 136 [2021-12-17 03:23:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:23:59,534 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 705 transitions. [2021-12-17 03:23:59,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:23:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 705 transitions. [2021-12-17 03:23:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-17 03:23:59,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:23:59,536 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, 1, 1] [2021-12-17 03:23:59,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 03:23:59,536 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:23:59,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:23:59,537 INFO L85 PathProgramCache]: Analyzing trace with hash -500982677, now seen corresponding path program 1 times [2021-12-17 03:23:59,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:23:59,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931877969] [2021-12-17 03:23:59,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:23:59,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:23:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:23:59,647 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 03:23:59,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:23:59,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931877969] [2021-12-17 03:23:59,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931877969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:23:59,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:23:59,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:23:59,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222805650] [2021-12-17 03:23:59,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:23:59,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:23:59,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:23:59,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:23:59,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:23:59,650 INFO L87 Difference]: Start difference. First operand 456 states and 705 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 03:24:01,666 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 03:24:01,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:01,940 INFO L93 Difference]: Finished difference Result 1012 states and 1566 transitions. [2021-12-17 03:24:01,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:01,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 140 [2021-12-17 03:24:01,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:01,942 INFO L225 Difference]: With dead ends: 1012 [2021-12-17 03:24:01,942 INFO L226 Difference]: Without dead ends: 577 [2021-12-17 03:24:01,943 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 03:24:01,943 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 137 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 51 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:01,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 392 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-12-17 03:24:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 486. [2021-12-17 03:24:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.5402061855670104) internal successors, (747), 485 states have internal predecessors, (747), 0 states have call successors, (0), 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 03:24:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 747 transitions. [2021-12-17 03:24:01,951 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 747 transitions. Word has length 140 [2021-12-17 03:24:01,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:01,951 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 747 transitions. [2021-12-17 03:24:01,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 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 03:24:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 747 transitions. [2021-12-17 03:24:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 03:24:01,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:01,953 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, 1, 1, 1] [2021-12-17 03:24:01,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 03:24:01,954 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:01,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1935119114, now seen corresponding path program 1 times [2021-12-17 03:24:01,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:01,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089098371] [2021-12-17 03:24:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:01,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:02,027 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 03:24:02,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:02,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089098371] [2021-12-17 03:24:02,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089098371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:02,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:02,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:02,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927227734] [2021-12-17 03:24:02,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:02,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:02,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:02,029 INFO L87 Difference]: Start difference. First operand 486 states and 747 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 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 03:24:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:02,763 INFO L93 Difference]: Finished difference Result 1030 states and 1582 transitions. [2021-12-17 03:24:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:02,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 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 141 [2021-12-17 03:24:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:02,765 INFO L225 Difference]: With dead ends: 1030 [2021-12-17 03:24:02,765 INFO L226 Difference]: Without dead ends: 565 [2021-12-17 03:24:02,765 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 03:24:02,766 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 143 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:02,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 430 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:24:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-12-17 03:24:02,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 486. [2021-12-17 03:24:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.5257731958762886) internal successors, (740), 485 states have internal predecessors, (740), 0 states have call successors, (0), 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 03:24:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 740 transitions. [2021-12-17 03:24:02,775 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 740 transitions. Word has length 141 [2021-12-17 03:24:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:02,775 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 740 transitions. [2021-12-17 03:24:02,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 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 03:24:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 740 transitions. [2021-12-17 03:24:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 03:24:02,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:02,777 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, 1, 1] [2021-12-17 03:24:02,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 03:24:02,777 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2119848563, now seen corresponding path program 1 times [2021-12-17 03:24:02,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:02,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032425193] [2021-12-17 03:24:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:02,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:02,888 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 03:24:02,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:02,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032425193] [2021-12-17 03:24:02,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032425193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:02,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:02,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:02,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219088204] [2021-12-17 03:24:02,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:02,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:02,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:02,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:02,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:02,890 INFO L87 Difference]: Start difference. First operand 486 states and 740 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 03:24:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:03,332 INFO L93 Difference]: Finished difference Result 987 states and 1507 transitions. [2021-12-17 03:24:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:03,332 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 03:24:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:03,333 INFO L225 Difference]: With dead ends: 987 [2021-12-17 03:24:03,333 INFO L226 Difference]: Without dead ends: 522 [2021-12-17 03:24:03,334 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 03:24:03,334 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 68 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:03,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 549 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:24:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-12-17 03:24:03,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 486. [2021-12-17 03:24:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 1.5237113402061855) internal successors, (739), 485 states have internal predecessors, (739), 0 states have call successors, (0), 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 03:24:03,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 739 transitions. [2021-12-17 03:24:03,346 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 739 transitions. Word has length 141 [2021-12-17 03:24:03,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:03,346 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 739 transitions. [2021-12-17 03:24:03,346 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 03:24:03,346 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 739 transitions. [2021-12-17 03:24:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 03:24:03,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:03,347 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, 1, 1, 1] [2021-12-17 03:24:03,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 03:24:03,348 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash 453444916, now seen corresponding path program 1 times [2021-12-17 03:24:03,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:03,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016185005] [2021-12-17 03:24:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:03,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 03:24:03,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:03,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016185005] [2021-12-17 03:24:03,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016185005] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:03,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:03,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:03,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093605874] [2021-12-17 03:24:03,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:03,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:03,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:03,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:03,427 INFO L87 Difference]: Start difference. First operand 486 states and 739 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 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 03:24:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:03,481 INFO L93 Difference]: Finished difference Result 1411 states and 2161 transitions. [2021-12-17 03:24:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:03,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 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 141 [2021-12-17 03:24:03,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:03,484 INFO L225 Difference]: With dead ends: 1411 [2021-12-17 03:24:03,484 INFO L226 Difference]: Without dead ends: 946 [2021-12-17 03:24:03,485 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 03:24:03,485 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 148 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:03,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 444 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2021-12-17 03:24:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 944. [2021-12-17 03:24:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 1.5143160127253446) internal successors, (1428), 943 states have internal predecessors, (1428), 0 states have call successors, (0), 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 03:24:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1428 transitions. [2021-12-17 03:24:03,498 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1428 transitions. Word has length 141 [2021-12-17 03:24:03,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:03,498 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 1428 transitions. [2021-12-17 03:24:03,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 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 03:24:03,499 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1428 transitions. [2021-12-17 03:24:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-17 03:24:03,500 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:03,500 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, 1, 1, 1] [2021-12-17 03:24:03,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 03:24:03,501 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:03,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash 877091638, now seen corresponding path program 1 times [2021-12-17 03:24:03,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:03,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128657370] [2021-12-17 03:24:03,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:03,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:03,603 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 03:24:03,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:03,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128657370] [2021-12-17 03:24:03,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128657370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:03,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:03,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:03,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756725046] [2021-12-17 03:24:03,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:03,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:03,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:03,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:03,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:03,606 INFO L87 Difference]: Start difference. First operand 944 states and 1428 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 03:24:05,627 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 03:24:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:05,912 INFO L93 Difference]: Finished difference Result 2104 states and 3169 transitions. [2021-12-17 03:24:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:05,912 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 141 [2021-12-17 03:24:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:05,915 INFO L225 Difference]: With dead ends: 2104 [2021-12-17 03:24:05,915 INFO L226 Difference]: Without dead ends: 1181 [2021-12-17 03:24:05,916 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 03:24:05,916 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 130 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:05,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 392 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 254 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 03:24:05,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-12-17 03:24:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1018. [2021-12-17 03:24:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 1.5142576204523108) internal successors, (1540), 1017 states have internal predecessors, (1540), 0 states have call successors, (0), 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 03:24:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1540 transitions. [2021-12-17 03:24:05,932 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1540 transitions. Word has length 141 [2021-12-17 03:24:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:05,932 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1540 transitions. [2021-12-17 03:24:05,932 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 03:24:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1540 transitions. [2021-12-17 03:24:05,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 03:24:05,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:05,934 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, 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 03:24:05,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 03:24:05,934 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:05,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1645099903, now seen corresponding path program 1 times [2021-12-17 03:24:05,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:05,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010942164] [2021-12-17 03:24:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:05,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:24:06,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010942164] [2021-12-17 03:24:06,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010942164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:06,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:06,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:06,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68543412] [2021-12-17 03:24:06,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:06,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:06,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:06,019 INFO L87 Difference]: Start difference. First operand 1018 states and 1540 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 03:24:07,470 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:07,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:07,748 INFO L93 Difference]: Finished difference Result 2168 states and 3261 transitions. [2021-12-17 03:24:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:07,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-17 03:24:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:07,751 INFO L225 Difference]: With dead ends: 2168 [2021-12-17 03:24:07,751 INFO L226 Difference]: Without dead ends: 1171 [2021-12-17 03:24:07,753 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 03:24:07,753 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 129 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:07,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 416 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 03:24:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-12-17 03:24:07,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1004. [2021-12-17 03:24:07,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.5074775672981058) internal successors, (1512), 1003 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 03:24:07,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1512 transitions. [2021-12-17 03:24:07,769 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1512 transitions. Word has length 142 [2021-12-17 03:24:07,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:07,769 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1512 transitions. [2021-12-17 03:24:07,769 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 03:24:07,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1512 transitions. [2021-12-17 03:24:07,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-17 03:24:07,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:07,771 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, 1, 1, 1] [2021-12-17 03:24:07,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 03:24:07,771 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:07,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1018768782, now seen corresponding path program 1 times [2021-12-17 03:24:07,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:07,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544069462] [2021-12-17 03:24:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:07,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:07,841 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 03:24:07,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:07,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544069462] [2021-12-17 03:24:07,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544069462] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:07,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:07,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:07,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221536930] [2021-12-17 03:24:07,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:07,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:07,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:07,843 INFO L87 Difference]: Start difference. First operand 1004 states and 1512 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 03:24:09,848 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 03:24:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:10,074 INFO L93 Difference]: Finished difference Result 2072 states and 3118 transitions. [2021-12-17 03:24:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:10,075 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 144 [2021-12-17 03:24:10,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:10,077 INFO L225 Difference]: With dead ends: 2072 [2021-12-17 03:24:10,078 INFO L226 Difference]: Without dead ends: 1089 [2021-12-17 03:24:10,078 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 03:24:10,079 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 70 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:10,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 549 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 225 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:10,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-12-17 03:24:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1004. [2021-12-17 03:24:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.505483549351944) internal successors, (1510), 1003 states have internal predecessors, (1510), 0 states have call successors, (0), 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 03:24:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1510 transitions. [2021-12-17 03:24:10,095 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1510 transitions. Word has length 144 [2021-12-17 03:24:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:10,096 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1510 transitions. [2021-12-17 03:24:10,096 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 03:24:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1510 transitions. [2021-12-17 03:24:10,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-17 03:24:10,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:10,098 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, 1, 1, 1] [2021-12-17 03:24:10,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 03:24:10,098 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:10,098 INFO L85 PathProgramCache]: Analyzing trace with hash -271637232, now seen corresponding path program 1 times [2021-12-17 03:24:10,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:10,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906052780] [2021-12-17 03:24:10,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:10,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:10,214 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 03:24:10,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:10,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906052780] [2021-12-17 03:24:10,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906052780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:10,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:10,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:10,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680563583] [2021-12-17 03:24:10,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:10,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:10,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:10,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:10,216 INFO L87 Difference]: Start difference. First operand 1004 states and 1510 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 03:24:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:10,714 INFO L93 Difference]: Finished difference Result 2140 states and 3201 transitions. [2021-12-17 03:24:10,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:10,715 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 145 [2021-12-17 03:24:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:10,718 INFO L225 Difference]: With dead ends: 2140 [2021-12-17 03:24:10,718 INFO L226 Difference]: Without dead ends: 1157 [2021-12-17 03:24:10,720 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 03:24:10,720 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 137 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:10,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 392 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 03:24:10,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2021-12-17 03:24:10,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1004. [2021-12-17 03:24:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 1.489531405782652) internal successors, (1494), 1003 states have internal predecessors, (1494), 0 states have call successors, (0), 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 03:24:10,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1494 transitions. [2021-12-17 03:24:10,734 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1494 transitions. Word has length 145 [2021-12-17 03:24:10,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:10,734 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 1494 transitions. [2021-12-17 03:24:10,735 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 03:24:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1494 transitions. [2021-12-17 03:24:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-17 03:24:10,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:10,736 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, 1, 1, 1, 1] [2021-12-17 03:24:10,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 03:24:10,737 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1679866725, now seen corresponding path program 1 times [2021-12-17 03:24:10,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:10,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386459904] [2021-12-17 03:24:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:10,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:10,811 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 03:24:10,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:10,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386459904] [2021-12-17 03:24:10,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386459904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:10,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:10,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:10,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559254410] [2021-12-17 03:24:10,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:10,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:10,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:10,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:10,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:10,813 INFO L87 Difference]: Start difference. First operand 1004 states and 1494 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 03:24:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:11,513 INFO L93 Difference]: Finished difference Result 2056 states and 3056 transitions. [2021-12-17 03:24:11,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:11,514 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 152 [2021-12-17 03:24:11,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:11,516 INFO L225 Difference]: With dead ends: 2056 [2021-12-17 03:24:11,517 INFO L226 Difference]: Without dead ends: 1073 [2021-12-17 03:24:11,517 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 03:24:11,518 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 52 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:11,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 567 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 03:24:11,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-12-17 03:24:11,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1012. [2021-12-17 03:24:11,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 1.489614243323442) internal successors, (1506), 1011 states have internal predecessors, (1506), 0 states have call successors, (0), 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 03:24:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1506 transitions. [2021-12-17 03:24:11,568 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1506 transitions. Word has length 152 [2021-12-17 03:24:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:11,569 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 1506 transitions. [2021-12-17 03:24:11,569 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 03:24:11,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1506 transitions. [2021-12-17 03:24:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-17 03:24:11,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:11,573 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, 1, 1, 1, 1] [2021-12-17 03:24:11,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 03:24:11,573 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:11,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:11,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1944185570, now seen corresponding path program 1 times [2021-12-17 03:24:11,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:11,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450650343] [2021-12-17 03:24:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:11,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:11,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:11,655 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 03:24:11,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:11,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450650343] [2021-12-17 03:24:11,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450650343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:11,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:11,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:11,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94055033] [2021-12-17 03:24:11,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:11,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:11,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:11,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:11,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:11,657 INFO L87 Difference]: Start difference. First operand 1012 states and 1506 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 03:24:13,672 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 03:24:13,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:13,927 INFO L93 Difference]: Finished difference Result 2156 states and 3193 transitions. [2021-12-17 03:24:13,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:13,927 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 153 [2021-12-17 03:24:13,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:13,930 INFO L225 Difference]: With dead ends: 2156 [2021-12-17 03:24:13,930 INFO L226 Difference]: Without dead ends: 1165 [2021-12-17 03:24:13,931 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 03:24:13,931 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 129 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 55 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:13,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 416 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 253 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 03:24:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-12-17 03:24:13,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1012. [2021-12-17 03:24:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 1.4817012858555885) internal successors, (1498), 1011 states have internal predecessors, (1498), 0 states have call successors, (0), 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 03:24:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1498 transitions. [2021-12-17 03:24:13,947 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1498 transitions. Word has length 153 [2021-12-17 03:24:13,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:13,947 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 1498 transitions. [2021-12-17 03:24:13,947 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 03:24:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1498 transitions. [2021-12-17 03:24:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 03:24:13,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:13,949 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, 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 03:24:13,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 03:24:13,949 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:13,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:13,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1547555526, now seen corresponding path program 1 times [2021-12-17 03:24:13,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:13,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244648478] [2021-12-17 03:24:13,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:13,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-17 03:24:14,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:14,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244648478] [2021-12-17 03:24:14,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244648478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:14,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:14,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:14,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578366375] [2021-12-17 03:24:14,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:14,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:14,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:14,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:14,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:14,061 INFO L87 Difference]: Start difference. First operand 1012 states and 1498 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 03:24:14,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:14,508 INFO L93 Difference]: Finished difference Result 2156 states and 3177 transitions. [2021-12-17 03:24:14,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:14,509 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 163 [2021-12-17 03:24:14,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:14,511 INFO L225 Difference]: With dead ends: 2156 [2021-12-17 03:24:14,512 INFO L226 Difference]: Without dead ends: 1165 [2021-12-17 03:24:14,512 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 03:24:14,513 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 133 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:14,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 416 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 03:24:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-12-17 03:24:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1012. [2021-12-17 03:24:14,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 1.469831849653808) internal successors, (1486), 1011 states have internal predecessors, (1486), 0 states have call successors, (0), 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 03:24:14,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1486 transitions. [2021-12-17 03:24:14,528 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1486 transitions. Word has length 163 [2021-12-17 03:24:14,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:14,528 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 1486 transitions. [2021-12-17 03:24:14,528 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 03:24:14,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1486 transitions. [2021-12-17 03:24:14,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-17 03:24:14,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:14,530 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, 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 03:24:14,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 03:24:14,530 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash -819531071, now seen corresponding path program 1 times [2021-12-17 03:24:14,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:14,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080247229] [2021-12-17 03:24:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:14,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-17 03:24:14,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:14,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080247229] [2021-12-17 03:24:14,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080247229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:14,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:14,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:14,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948979058] [2021-12-17 03:24:14,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:14,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:14,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:14,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:14,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:14,607 INFO L87 Difference]: Start difference. First operand 1012 states and 1486 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 03:24:15,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:15,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:15,922 INFO L93 Difference]: Finished difference Result 2102 states and 3085 transitions. [2021-12-17 03:24:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:15,922 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 166 [2021-12-17 03:24:15,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:15,925 INFO L225 Difference]: With dead ends: 2102 [2021-12-17 03:24:15,925 INFO L226 Difference]: Without dead ends: 1111 [2021-12-17 03:24:15,926 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 03:24:15,926 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 37 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:15,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 613 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 03:24:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-12-17 03:24:15,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1064. [2021-12-17 03:24:15,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1063 states have (on average 1.4694261523988712) internal successors, (1562), 1063 states have internal predecessors, (1562), 0 states have call successors, (0), 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 03:24:15,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1562 transitions. [2021-12-17 03:24:15,963 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1562 transitions. Word has length 166 [2021-12-17 03:24:15,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:15,963 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 1562 transitions. [2021-12-17 03:24:15,963 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 03:24:15,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1562 transitions. [2021-12-17 03:24:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 03:24:15,965 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:15,965 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 03:24:15,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 03:24:15,965 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash 569314309, now seen corresponding path program 1 times [2021-12-17 03:24:15,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:15,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674009036] [2021-12-17 03:24:15,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:15,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:16,030 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 03:24:16,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:16,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674009036] [2021-12-17 03:24:16,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674009036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:16,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:16,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:16,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221365896] [2021-12-17 03:24:16,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:16,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:16,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:16,032 INFO L87 Difference]: Start difference. First operand 1064 states and 1562 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 03:24:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:16,069 INFO L93 Difference]: Finished difference Result 2134 states and 3136 transitions. [2021-12-17 03:24:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:16,069 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 03:24:16,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:16,072 INFO L225 Difference]: With dead ends: 2134 [2021-12-17 03:24:16,072 INFO L226 Difference]: Without dead ends: 1091 [2021-12-17 03:24:16,073 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 03:24:16,073 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:16,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 426 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-12-17 03:24:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1091. [2021-12-17 03:24:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1091 states, 1090 states have (on average 1.465137614678899) internal successors, (1597), 1090 states have internal predecessors, (1597), 0 states have call successors, (0), 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 03:24:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1091 states to 1091 states and 1597 transitions. [2021-12-17 03:24:16,087 INFO L78 Accepts]: Start accepts. Automaton has 1091 states and 1597 transitions. Word has length 168 [2021-12-17 03:24:16,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:16,088 INFO L470 AbstractCegarLoop]: Abstraction has 1091 states and 1597 transitions. [2021-12-17 03:24:16,088 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 03:24:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1091 states and 1597 transitions. [2021-12-17 03:24:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-17 03:24:16,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:16,090 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 03:24:16,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 03:24:16,090 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:16,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1794527353, now seen corresponding path program 1 times [2021-12-17 03:24:16,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:16,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876212592] [2021-12-17 03:24:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:16,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:16,149 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 03:24:16,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:16,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876212592] [2021-12-17 03:24:16,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876212592] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:16,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:16,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 03:24:16,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605195720] [2021-12-17 03:24:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:16,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 03:24:16,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 03:24:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 03:24:16,151 INFO L87 Difference]: Start difference. First operand 1091 states and 1597 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 03:24:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:16,184 INFO L93 Difference]: Finished difference Result 2163 states and 3172 transitions. [2021-12-17 03:24:16,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 03:24:16,184 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 03:24:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:16,187 INFO L225 Difference]: With dead ends: 2163 [2021-12-17 03:24:16,187 INFO L226 Difference]: Without dead ends: 1093 [2021-12-17 03:24:16,188 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 03:24:16,189 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 4 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:16,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 405 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 03:24:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-12-17 03:24:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1093. [2021-12-17 03:24:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 1.4642857142857142) internal successors, (1599), 1092 states have internal predecessors, (1599), 0 states have call successors, (0), 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 03:24:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1599 transitions. [2021-12-17 03:24:16,233 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1599 transitions. Word has length 168 [2021-12-17 03:24:16,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:16,234 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1599 transitions. [2021-12-17 03:24:16,234 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 03:24:16,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1599 transitions. [2021-12-17 03:24:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-17 03:24:16,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:16,235 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, 1, 1, 1] [2021-12-17 03:24:16,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 03:24:16,235 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:16,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1120231180, now seen corresponding path program 1 times [2021-12-17 03:24:16,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295008420] [2021-12-17 03:24:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:16,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:16,331 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 03:24:16,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:16,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295008420] [2021-12-17 03:24:16,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295008420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:16,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:16,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 03:24:16,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770640101] [2021-12-17 03:24:16,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:16,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 03:24:16,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:16,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 03:24:16,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 03:24:16,337 INFO L87 Difference]: Start difference. First operand 1093 states and 1599 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:18,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:18,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:18,472 INFO L93 Difference]: Finished difference Result 2317 states and 3378 transitions. [2021-12-17 03:24:18,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 03:24:18,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-12-17 03:24:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:18,475 INFO L225 Difference]: With dead ends: 2317 [2021-12-17 03:24:18,475 INFO L226 Difference]: Without dead ends: 1247 [2021-12-17 03:24:18,476 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 03:24:18,476 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 137 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:18,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 434 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 03:24:18,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-12-17 03:24:18,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1093. [2021-12-17 03:24:18,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 1.4496336996336996) internal successors, (1583), 1092 states have internal predecessors, (1583), 0 states have call successors, (0), 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 03:24:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1583 transitions. [2021-12-17 03:24:18,493 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1583 transitions. Word has length 172 [2021-12-17 03:24:18,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:18,495 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1583 transitions. [2021-12-17 03:24:18,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:18,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1583 transitions. [2021-12-17 03:24:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-17 03:24:18,496 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:18,497 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, 1, 1, 1, 1] [2021-12-17 03:24:18,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 03:24:18,497 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1438223023, now seen corresponding path program 1 times [2021-12-17 03:24:18,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:18,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260717106] [2021-12-17 03:24:18,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:18,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-12-17 03:24:18,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:18,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260717106] [2021-12-17 03:24:18,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260717106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:24:18,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:24:18,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 03:24:18,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685566468] [2021-12-17 03:24:18,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:24:18,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 03:24:18,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:24:18,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 03:24:18,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 03:24:18,812 INFO L87 Difference]: Start difference. First operand 1093 states and 1583 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:20,461 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:21,692 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:24:21,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:24:21,930 INFO L93 Difference]: Finished difference Result 2183 states and 3162 transitions. [2021-12-17 03:24:21,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 03:24:21,931 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-12-17 03:24:21,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:24:21,934 INFO L225 Difference]: With dead ends: 2183 [2021-12-17 03:24:21,934 INFO L226 Difference]: Without dead ends: 1093 [2021-12-17 03:24:21,934 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 03:24:21,935 INFO L933 BasicCegarLoop]: 222 mSDtfsCounter, 7 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:24:21,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 735 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 03:24:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-12-17 03:24:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1093. [2021-12-17 03:24:21,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 1.4487179487179487) internal successors, (1582), 1092 states have internal predecessors, (1582), 0 states have call successors, (0), 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 03:24:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1582 transitions. [2021-12-17 03:24:21,956 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1582 transitions. Word has length 172 [2021-12-17 03:24:21,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:24:21,956 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1582 transitions. [2021-12-17 03:24:21,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 03:24:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1582 transitions. [2021-12-17 03:24:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-17 03:24:21,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:24:21,958 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, 1, 1, 1, 1] [2021-12-17 03:24:21,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 03:24:21,958 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:24:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:24:21,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1353645967, now seen corresponding path program 1 times [2021-12-17 03:24:21,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:24:21,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146897560] [2021-12-17 03:24:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:21,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:24:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 14 proven. 146 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-17 03:24:22,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:24:22,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146897560] [2021-12-17 03:24:22,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146897560] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 03:24:22,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992906915] [2021-12-17 03:24:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:24:22,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 03:24:22,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 03:24:22,701 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 03:24:22,747 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 03:24:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:24:23,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 242 conjunts are in the unsatisfiable core [2021-12-17 03:24:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 03:24:23,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,880 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 132925 treesize of output 100032 [2021-12-17 03:24:23,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,923 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 54336 treesize of output 54355 [2021-12-17 03:24:23,938 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 64375 treesize of output 46402 [2021-12-17 03:24:23,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,988 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 23486 treesize of output 23505 [2021-12-17 03:24:23,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:23,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:24,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:24,189 INFO L354 Elim1Store]: treesize reduction 138, result has 16.9 percent of original size [2021-12-17 03:24:24,190 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 27603 treesize of output 10614 [2021-12-17 03:24:24,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 03:24:32,978 INFO L244 Elim1Store]: Index analysis took 476 ms