./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/openssl/s3_srvr.blast.13.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.13.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 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:02:06,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:02:06,455 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:02:06,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:02:06,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:02:06,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:02:06,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:02:06,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:02:06,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:02:06,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:02:06,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:02:06,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:02:06,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:02:06,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:02:06,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:02:06,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:02:06,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:02:06,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:02:06,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:02:06,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:02:06,552 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:02:06,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:02:06,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:02:06,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:02:06,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:02:06,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:02:06,566 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:02:06,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:02:06,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:02:06,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:02:06,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:02:06,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:02:06,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:02:06,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:02:06,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:02:06,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:02:06,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:02:06,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:02:06,575 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:02:06,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:02:06,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:02:06,577 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:02:06,614 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:02:06,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:02:06,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:02:06,619 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:02:06,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:02:06,621 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:02:06,621 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:02:06,621 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:02:06,622 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:02:06,622 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:02:06,623 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:02:06,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:02:06,623 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:02:06,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:02:06,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:02:06,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:02:06,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:02:06,624 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:02:06,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:02:06,625 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:02:06,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:02:06,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:02:06,625 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:02:06,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:02:06,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:02:06,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:02:06,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:02:06,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:02:06,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:02:06,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:02:06,627 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:02:06,627 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:02:06,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:02:06,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:02:06,627 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 58a6b373d05d29cc87bb425c83b649cc4007a71cb802ce7ef5b6914b7a7817df [2021-12-15 22:02:06,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:02:06,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:02:06,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:02:06,930 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:02:06,930 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:02:06,932 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-12-15 22:02:06,993 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/661d00b3b/29f8e0328eed4cc6930b9e4123f284ff/FLAGf304d54eb [2021-12-15 22:02:07,452 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:02:07,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-1.c [2021-12-15 22:02:07,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/661d00b3b/29f8e0328eed4cc6930b9e4123f284ff/FLAGf304d54eb [2021-12-15 22:02:07,784 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/661d00b3b/29f8e0328eed4cc6930b9e4123f284ff [2021-12-15 22:02:07,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:02:07,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:02:07,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:02:07,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:02:07,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:02:07,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:02:07" (1/1) ... [2021-12-15 22:02:07,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6892848f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:07, skipping insertion in model container [2021-12-15 22:02:07,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:02:07" (1/1) ... [2021-12-15 22:02:07,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:02:07,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:02:08,166 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.13.i.cil-1.c[74354,74367] [2021-12-15 22:02:08,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:02:08,200 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:02:08,355 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.13.i.cil-1.c[74354,74367] [2021-12-15 22:02:08,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:02:08,378 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:02:08,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08 WrapperNode [2021-12-15 22:02:08,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:02:08,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:02:08,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:02:08,382 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:02:08,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (1/1) ... [2021-12-15 22:02:08,421 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (1/1) ... [2021-12-15 22:02:08,473 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2021-12-15 22:02:08,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:02:08,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:02:08,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:02:08,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:02:08,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (1/1) ... [2021-12-15 22:02:08,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (1/1) ... [2021-12-15 22:02:08,501 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (1/1) ... [2021-12-15 22:02:08,502 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (1/1) ... [2021-12-15 22:02:08,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (1/1) ... [2021-12-15 22:02:08,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (1/1) ... [2021-12-15 22:02:08,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (1/1) ... [2021-12-15 22:02:08,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:02:08,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:02:08,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:02:08,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:02:08,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (1/1) ... [2021-12-15 22:02:08,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:02:08,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:02:08,588 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) [2021-12-15 22:02:08,608 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 [2021-12-15 22:02:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:02:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 22:02:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 22:02:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 22:02:08,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 22:02:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:02:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 22:02:08,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:02:08,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:02:08,806 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:02:08,808 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:02:08,822 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-15 22:02:10,511 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-12-15 22:02:10,511 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-12-15 22:02:10,511 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:02:10,521 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:02:10,522 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:02:10,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:02:10 BoogieIcfgContainer [2021-12-15 22:02:10,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:02:10,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:02:10,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:02:10,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:02:10,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:02:07" (1/3) ... [2021-12-15 22:02:10,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c9660e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:02:10, skipping insertion in model container [2021-12-15 22:02:10,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:02:08" (2/3) ... [2021-12-15 22:02:10,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c9660e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:02:10, skipping insertion in model container [2021-12-15 22:02:10,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:02:10" (3/3) ... [2021-12-15 22:02:10,532 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.13.i.cil-1.c [2021-12-15 22:02:10,537 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:02:10,537 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:02:10,586 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:02:10,591 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 [2021-12-15 22:02:10,595 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:02:10,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:10,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-15 22:02:10,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:10,629 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] [2021-12-15 22:02:10,629 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:10,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:10,641 INFO L85 PathProgramCache]: Analyzing trace with hash -442385417, now seen corresponding path program 1 times [2021-12-15 22:02:10,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:10,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858166483] [2021-12-15 22:02:10,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:10,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:11,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:11,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858166483] [2021-12-15 22:02:11,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858166483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:11,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:11,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:11,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113138814] [2021-12-15 22:02:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:11,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:11,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:11,235 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:12,337 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 [] [2021-12-15 22:02:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:12,682 INFO L93 Difference]: Finished difference Result 325 states and 550 transitions. [2021-12-15 22:02:12,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:12,686 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-15 22:02:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:12,696 INFO L225 Difference]: With dead ends: 325 [2021-12-15 22:02:12,696 INFO L226 Difference]: Without dead ends: 165 [2021-12-15 22:02:12,698 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 [2021-12-15 22:02:12,701 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 36 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:12,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 585 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 22:02:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-15 22:02:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-12-15 22:02:12,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5578231292517006) internal successors, (229), 147 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:12,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 229 transitions. [2021-12-15 22:02:12,735 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 229 transitions. Word has length 37 [2021-12-15 22:02:12,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:12,735 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 229 transitions. [2021-12-15 22:02:12,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 229 transitions. [2021-12-15 22:02:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-15 22:02:12,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:12,738 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] [2021-12-15 22:02:12,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:02:12,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:12,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1650885502, now seen corresponding path program 1 times [2021-12-15 22:02:12,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:12,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957048504] [2021-12-15 22:02:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:12,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:12,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:12,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957048504] [2021-12-15 22:02:12,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957048504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:12,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:12,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:12,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168934418] [2021-12-15 22:02:12,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:12,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:12,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:12,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:12,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:12,870 INFO L87 Difference]: Start difference. First operand 148 states and 229 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:13,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:13,422 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2021-12-15 22:02:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:13,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-15 22:02:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:13,424 INFO L225 Difference]: With dead ends: 292 [2021-12-15 22:02:13,424 INFO L226 Difference]: Without dead ends: 165 [2021-12-15 22:02:13,425 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 [2021-12-15 22:02:13,426 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 24 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:13,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 471 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 22:02:13,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-15 22:02:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-12-15 22:02:13,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5510204081632653) internal successors, (228), 147 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 228 transitions. [2021-12-15 22:02:13,448 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 228 transitions. Word has length 50 [2021-12-15 22:02:13,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:13,449 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 228 transitions. [2021-12-15 22:02:13,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 228 transitions. [2021-12-15 22:02:13,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 22:02:13,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:13,454 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] [2021-12-15 22:02:13,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:02:13,455 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash -24642669, now seen corresponding path program 1 times [2021-12-15 22:02:13,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:13,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321934928] [2021-12-15 22:02:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:13,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:13,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:13,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321934928] [2021-12-15 22:02:13,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321934928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:13,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:13,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:13,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585866803] [2021-12-15 22:02:13,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:13,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:13,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:13,625 INFO L87 Difference]: Start difference. First operand 148 states and 228 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:15,631 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 [] [2021-12-15 22:02:15,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:15,946 INFO L93 Difference]: Finished difference Result 291 states and 444 transitions. [2021-12-15 22:02:15,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:15,947 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-15 22:02:15,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:15,949 INFO L225 Difference]: With dead ends: 291 [2021-12-15 22:02:15,949 INFO L226 Difference]: Without dead ends: 164 [2021-12-15 22:02:15,949 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 [2021-12-15 22:02:15,950 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 28 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:15,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:15,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-15 22:02:15,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-12-15 22:02:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5442176870748299) internal successors, (227), 147 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 227 transitions. [2021-12-15 22:02:15,960 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 227 transitions. Word has length 51 [2021-12-15 22:02:15,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:15,960 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 227 transitions. [2021-12-15 22:02:15,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 227 transitions. [2021-12-15 22:02:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 22:02:15,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:15,962 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] [2021-12-15 22:02:15,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:02:15,963 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash 840936487, now seen corresponding path program 1 times [2021-12-15 22:02:15,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:15,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064116274] [2021-12-15 22:02:15,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:15,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:16,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:16,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064116274] [2021-12-15 22:02:16,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064116274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:16,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:16,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:16,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483397586] [2021-12-15 22:02:16,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:16,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:16,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:16,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:16,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:16,060 INFO L87 Difference]: Start difference. First operand 148 states and 227 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:18,076 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 [] [2021-12-15 22:02:18,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:18,322 INFO L93 Difference]: Finished difference Result 291 states and 443 transitions. [2021-12-15 22:02:18,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:18,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-15 22:02:18,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:18,324 INFO L225 Difference]: With dead ends: 291 [2021-12-15 22:02:18,324 INFO L226 Difference]: Without dead ends: 164 [2021-12-15 22:02:18,325 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 [2021-12-15 22:02:18,326 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 26 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:18,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 473 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-12-15 22:02:18,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 148. [2021-12-15 22:02:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5374149659863945) internal successors, (226), 147 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 226 transitions. [2021-12-15 22:02:18,339 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 226 transitions. Word has length 51 [2021-12-15 22:02:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:18,339 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 226 transitions. [2021-12-15 22:02:18,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 226 transitions. [2021-12-15 22:02:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 22:02:18,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:18,341 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] [2021-12-15 22:02:18,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:02:18,341 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:18,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:18,342 INFO L85 PathProgramCache]: Analyzing trace with hash 451751422, now seen corresponding path program 1 times [2021-12-15 22:02:18,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:18,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40174267] [2021-12-15 22:02:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:18,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:18,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:18,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40174267] [2021-12-15 22:02:18,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40174267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:18,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:18,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:18,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696546275] [2021-12-15 22:02:18,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:18,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:18,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:18,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:18,478 INFO L87 Difference]: Start difference. First operand 148 states and 226 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:20,495 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 [] [2021-12-15 22:02:20,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:20,852 INFO L93 Difference]: Finished difference Result 393 states and 607 transitions. [2021-12-15 22:02:20,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:20,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-15 22:02:20,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:20,854 INFO L225 Difference]: With dead ends: 393 [2021-12-15 22:02:20,854 INFO L226 Difference]: Without dead ends: 266 [2021-12-15 22:02:20,855 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 [2021-12-15 22:02:20,856 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:20,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:20,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-15 22:02:20,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-15 22:02:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5454545454545454) internal successors, (255), 165 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 255 transitions. [2021-12-15 22:02:20,879 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 255 transitions. Word has length 51 [2021-12-15 22:02:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:20,880 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 255 transitions. [2021-12-15 22:02:20,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 255 transitions. [2021-12-15 22:02:20,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-15 22:02:20,881 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:20,881 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] [2021-12-15 22:02:20,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:02:20,881 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:20,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:20,882 INFO L85 PathProgramCache]: Analyzing trace with hash -88394050, now seen corresponding path program 1 times [2021-12-15 22:02:20,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:20,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942782234] [2021-12-15 22:02:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:20,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:20,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:20,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942782234] [2021-12-15 22:02:20,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942782234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:20,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:20,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:20,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921841531] [2021-12-15 22:02:20,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:20,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:20,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:20,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:20,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:20,993 INFO L87 Difference]: Start difference. First operand 166 states and 255 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:21,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:21,930 INFO L93 Difference]: Finished difference Result 411 states and 635 transitions. [2021-12-15 22:02:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:21,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-12-15 22:02:21,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:21,932 INFO L225 Difference]: With dead ends: 411 [2021-12-15 22:02:21,932 INFO L226 Difference]: Without dead ends: 266 [2021-12-15 22:02:21,933 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 [2021-12-15 22:02:21,934 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:21,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-15 22:02:21,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-15 22:02:21,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-15 22:02:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5333333333333334) internal successors, (253), 165 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 253 transitions. [2021-12-15 22:02:21,955 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 253 transitions. Word has length 51 [2021-12-15 22:02:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:21,955 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 253 transitions. [2021-12-15 22:02:21,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:21,956 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 253 transitions. [2021-12-15 22:02:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-15 22:02:21,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:21,957 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] [2021-12-15 22:02:21,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:02:21,958 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:21,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash -388419541, now seen corresponding path program 1 times [2021-12-15 22:02:21,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:21,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267388801] [2021-12-15 22:02:21,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:21,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:22,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267388801] [2021-12-15 22:02:22,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267388801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:22,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:22,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:22,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791366027] [2021-12-15 22:02:22,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:22,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:22,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:22,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:22,070 INFO L87 Difference]: Start difference. First operand 166 states and 253 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:22,768 INFO L93 Difference]: Finished difference Result 411 states and 632 transitions. [2021-12-15 22:02:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:22,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-12-15 22:02:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:22,770 INFO L225 Difference]: With dead ends: 411 [2021-12-15 22:02:22,770 INFO L226 Difference]: Without dead ends: 266 [2021-12-15 22:02:22,771 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 [2021-12-15 22:02:22,772 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 148 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:22,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 22:02:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-15 22:02:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-15 22:02:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.5212121212121212) internal successors, (251), 165 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 251 transitions. [2021-12-15 22:02:22,780 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 251 transitions. Word has length 52 [2021-12-15 22:02:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:22,780 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 251 transitions. [2021-12-15 22:02:22,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:22,780 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 251 transitions. [2021-12-15 22:02:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-15 22:02:22,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:22,781 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] [2021-12-15 22:02:22,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:02:22,782 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:22,782 INFO L85 PathProgramCache]: Analyzing trace with hash -162201364, now seen corresponding path program 1 times [2021-12-15 22:02:22,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:22,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383358290] [2021-12-15 22:02:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:22,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:22,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:22,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383358290] [2021-12-15 22:02:22,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383358290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:22,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:22,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:22,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503002759] [2021-12-15 22:02:22,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:22,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:22,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:22,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:22,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:22,874 INFO L87 Difference]: Start difference. First operand 166 states and 251 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:24,890 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 [] [2021-12-15 22:02:25,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:25,235 INFO L93 Difference]: Finished difference Result 411 states and 629 transitions. [2021-12-15 22:02:25,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:25,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-15 22:02:25,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:25,237 INFO L225 Difference]: With dead ends: 411 [2021-12-15 22:02:25,237 INFO L226 Difference]: Without dead ends: 266 [2021-12-15 22:02:25,237 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 [2021-12-15 22:02:25,238 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 146 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:25,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 332 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:25,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-15 22:02:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-12-15 22:02:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.509090909090909) internal successors, (249), 165 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 249 transitions. [2021-12-15 22:02:25,245 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 249 transitions. Word has length 53 [2021-12-15 22:02:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:25,245 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 249 transitions. [2021-12-15 22:02:25,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 249 transitions. [2021-12-15 22:02:25,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 22:02:25,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:25,246 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] [2021-12-15 22:02:25,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:02:25,247 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2057823088, now seen corresponding path program 1 times [2021-12-15 22:02:25,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:25,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762602585] [2021-12-15 22:02:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:25,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:25,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:25,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762602585] [2021-12-15 22:02:25,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762602585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:25,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:25,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:25,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940364590] [2021-12-15 22:02:25,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:25,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:25,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:25,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:25,351 INFO L87 Difference]: Start difference. First operand 166 states and 249 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:27,359 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 [] [2021-12-15 22:02:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:27,528 INFO L93 Difference]: Finished difference Result 314 states and 476 transitions. [2021-12-15 22:02:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-15 22:02:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:27,529 INFO L225 Difference]: With dead ends: 314 [2021-12-15 22:02:27,530 INFO L226 Difference]: Without dead ends: 169 [2021-12-15 22:02:27,530 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 [2021-12-15 22:02:27,530 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 11 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:27,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-15 22:02:27,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 166. [2021-12-15 22:02:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.503030303030303) internal successors, (248), 165 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:27,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 248 transitions. [2021-12-15 22:02:27,535 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 248 transitions. Word has length 54 [2021-12-15 22:02:27,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:27,535 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 248 transitions. [2021-12-15 22:02:27,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:27,536 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 248 transitions. [2021-12-15 22:02:27,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-15 22:02:27,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:27,536 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] [2021-12-15 22:02:27,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:02:27,536 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:27,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1297584632, now seen corresponding path program 1 times [2021-12-15 22:02:27,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:27,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415268875] [2021-12-15 22:02:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:27,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:27,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:27,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415268875] [2021-12-15 22:02:27,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415268875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:27,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:27,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:27,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933237677] [2021-12-15 22:02:27,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:27,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:27,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:27,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:27,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:27,622 INFO L87 Difference]: Start difference. First operand 166 states and 248 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:29,635 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 [] [2021-12-15 22:02:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:29,975 INFO L93 Difference]: Finished difference Result 429 states and 652 transitions. [2021-12-15 22:02:29,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-15 22:02:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:29,977 INFO L225 Difference]: With dead ends: 429 [2021-12-15 22:02:29,977 INFO L226 Difference]: Without dead ends: 284 [2021-12-15 22:02:29,978 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 [2021-12-15 22:02:29,978 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 132 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:29,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 332 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:29,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-12-15 22:02:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 194. [2021-12-15 22:02:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 1.5233160621761659) internal successors, (294), 193 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 294 transitions. [2021-12-15 22:02:29,985 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 294 transitions. Word has length 54 [2021-12-15 22:02:29,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:29,985 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 294 transitions. [2021-12-15 22:02:29,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:29,986 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 294 transitions. [2021-12-15 22:02:29,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-15 22:02:29,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:29,986 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] [2021-12-15 22:02:29,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:02:29,987 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:29,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:29,987 INFO L85 PathProgramCache]: Analyzing trace with hash -335911398, now seen corresponding path program 1 times [2021-12-15 22:02:29,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:29,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003176098] [2021-12-15 22:02:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:29,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:30,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:30,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003176098] [2021-12-15 22:02:30,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003176098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:30,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:30,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:30,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898956456] [2021-12-15 22:02:30,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:30,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:30,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:30,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:30,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:30,077 INFO L87 Difference]: Start difference. First operand 194 states and 294 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:32,089 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 [] [2021-12-15 22:02:32,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:32,310 INFO L93 Difference]: Finished difference Result 409 states and 624 transitions. [2021-12-15 22:02:32,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:32,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-15 22:02:32,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:32,312 INFO L225 Difference]: With dead ends: 409 [2021-12-15 22:02:32,313 INFO L226 Difference]: Without dead ends: 236 [2021-12-15 22:02:32,313 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 [2021-12-15 22:02:32,313 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 30 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:32,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 493 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 165 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-15 22:02:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 216. [2021-12-15 22:02:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5255813953488373) internal successors, (328), 215 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 328 transitions. [2021-12-15 22:02:32,328 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 328 transitions. Word has length 55 [2021-12-15 22:02:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:32,328 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 328 transitions. [2021-12-15 22:02:32,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:32,328 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 328 transitions. [2021-12-15 22:02:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-15 22:02:32,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:32,330 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:32,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:02:32,331 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:32,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1348956911, now seen corresponding path program 1 times [2021-12-15 22:02:32,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173297414] [2021-12-15 22:02:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:32,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:32,429 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:32,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173297414] [2021-12-15 22:02:32,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173297414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:32,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:32,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:32,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528115260] [2021-12-15 22:02:32,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:32,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:32,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:32,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:32,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:32,432 INFO L87 Difference]: Start difference. First operand 216 states and 328 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:34,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:34,703 INFO L93 Difference]: Finished difference Result 429 states and 655 transitions. [2021-12-15 22:02:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:34,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-15 22:02:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:34,704 INFO L225 Difference]: With dead ends: 429 [2021-12-15 22:02:34,704 INFO L226 Difference]: Without dead ends: 234 [2021-12-15 22:02:34,705 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 [2021-12-15 22:02:34,706 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 35 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:34,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 497 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:34,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-12-15 22:02:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 216. [2021-12-15 22:02:34,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5209302325581395) internal successors, (327), 215 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 327 transitions. [2021-12-15 22:02:34,712 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 327 transitions. Word has length 68 [2021-12-15 22:02:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:34,712 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 327 transitions. [2021-12-15 22:02:34,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 327 transitions. [2021-12-15 22:02:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 22:02:34,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:34,714 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:34,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:02:34,714 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:34,715 INFO L85 PathProgramCache]: Analyzing trace with hash -913541186, now seen corresponding path program 1 times [2021-12-15 22:02:34,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:34,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450740476] [2021-12-15 22:02:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:34,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:34,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:34,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450740476] [2021-12-15 22:02:34,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450740476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:34,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:34,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:34,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033979649] [2021-12-15 22:02:34,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:34,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:34,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:34,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:34,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:34,825 INFO L87 Difference]: Start difference. First operand 216 states and 327 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:36,832 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 [] [2021-12-15 22:02:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:37,064 INFO L93 Difference]: Finished difference Result 428 states and 652 transitions. [2021-12-15 22:02:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:37,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-15 22:02:37,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:37,066 INFO L225 Difference]: With dead ends: 428 [2021-12-15 22:02:37,066 INFO L226 Difference]: Without dead ends: 233 [2021-12-15 22:02:37,067 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 [2021-12-15 22:02:37,067 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 39 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:37,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-15 22:02:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-12-15 22:02:37,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5162790697674418) internal successors, (326), 215 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 326 transitions. [2021-12-15 22:02:37,073 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 326 transitions. Word has length 69 [2021-12-15 22:02:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:37,074 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 326 transitions. [2021-12-15 22:02:37,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 326 transitions. [2021-12-15 22:02:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-15 22:02:37,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:37,074 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-15 22:02:37,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:02:37,075 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash 149608874, now seen corresponding path program 1 times [2021-12-15 22:02:37,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:37,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368050855] [2021-12-15 22:02:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:37,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:37,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:37,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368050855] [2021-12-15 22:02:37,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368050855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:37,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:37,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:37,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998396621] [2021-12-15 22:02:37,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:37,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:37,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:37,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:37,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:37,196 INFO L87 Difference]: Start difference. First operand 216 states and 326 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:39,203 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 [] [2021-12-15 22:02:39,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:39,401 INFO L93 Difference]: Finished difference Result 428 states and 650 transitions. [2021-12-15 22:02:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:39,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-15 22:02:39,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:39,402 INFO L225 Difference]: With dead ends: 428 [2021-12-15 22:02:39,402 INFO L226 Difference]: Without dead ends: 233 [2021-12-15 22:02:39,403 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 [2021-12-15 22:02:39,404 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 37 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:39,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 499 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 158 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-15 22:02:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 216. [2021-12-15 22:02:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5116279069767442) internal successors, (325), 215 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:39,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 325 transitions. [2021-12-15 22:02:39,409 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 325 transitions. Word has length 69 [2021-12-15 22:02:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:39,410 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 325 transitions. [2021-12-15 22:02:39,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:39,410 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 325 transitions. [2021-12-15 22:02:39,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-15 22:02:39,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:39,411 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-12-15 22:02:39,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:02:39,411 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:39,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1277041085, now seen corresponding path program 1 times [2021-12-15 22:02:39,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:39,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777887602] [2021-12-15 22:02:39,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:39,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:02:39,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:39,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777887602] [2021-12-15 22:02:39,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777887602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:39,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:39,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:39,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146306687] [2021-12-15 22:02:39,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:39,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:39,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:39,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:39,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:39,498 INFO L87 Difference]: Start difference. First operand 216 states and 325 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:41,507 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 [] [2021-12-15 22:02:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:41,712 INFO L93 Difference]: Finished difference Result 418 states and 635 transitions. [2021-12-15 22:02:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:41,712 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-15 22:02:41,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:41,713 INFO L225 Difference]: With dead ends: 418 [2021-12-15 22:02:41,713 INFO L226 Difference]: Without dead ends: 223 [2021-12-15 22:02:41,714 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 [2021-12-15 22:02:41,714 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 26 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:41,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 513 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:41,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-15 22:02:41,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2021-12-15 22:02:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 215 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:41,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 324 transitions. [2021-12-15 22:02:41,720 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 324 transitions. Word has length 72 [2021-12-15 22:02:41,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:41,720 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 324 transitions. [2021-12-15 22:02:41,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:41,720 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 324 transitions. [2021-12-15 22:02:41,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 22:02:41,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:41,721 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:41,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:02:41,721 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:41,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2072837020, now seen corresponding path program 1 times [2021-12-15 22:02:41,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:41,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46484015] [2021-12-15 22:02:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:41,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:41,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:41,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46484015] [2021-12-15 22:02:41,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46484015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:41,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:41,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:41,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362296313] [2021-12-15 22:02:41,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:41,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:41,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:41,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:41,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:41,832 INFO L87 Difference]: Start difference. First operand 216 states and 324 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:43,840 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 [] [2021-12-15 22:02:44,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:44,138 INFO L93 Difference]: Finished difference Result 509 states and 769 transitions. [2021-12-15 22:02:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:44,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 22:02:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:44,140 INFO L225 Difference]: With dead ends: 509 [2021-12-15 22:02:44,140 INFO L226 Difference]: Without dead ends: 314 [2021-12-15 22:02:44,141 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 [2021-12-15 22:02:44,141 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 91 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:44,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 465 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:44,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-12-15 22:02:44,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 247. [2021-12-15 22:02:44,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.516260162601626) internal successors, (373), 246 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 373 transitions. [2021-12-15 22:02:44,149 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 373 transitions. Word has length 77 [2021-12-15 22:02:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:44,150 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 373 transitions. [2021-12-15 22:02:44,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 373 transitions. [2021-12-15 22:02:44,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-15 22:02:44,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:44,151 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:44,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 22:02:44,151 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash -21853022, now seen corresponding path program 1 times [2021-12-15 22:02:44,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:44,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021608954] [2021-12-15 22:02:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:44,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:44,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:44,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021608954] [2021-12-15 22:02:44,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021608954] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:44,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:44,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:44,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379836514] [2021-12-15 22:02:44,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:44,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:44,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:44,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:44,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:44,256 INFO L87 Difference]: Start difference. First operand 247 states and 373 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:46,265 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 [] [2021-12-15 22:02:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:46,555 INFO L93 Difference]: Finished difference Result 573 states and 875 transitions. [2021-12-15 22:02:46,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-15 22:02:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:46,556 INFO L225 Difference]: With dead ends: 573 [2021-12-15 22:02:46,557 INFO L226 Difference]: Without dead ends: 347 [2021-12-15 22:02:46,557 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 [2021-12-15 22:02:46,558 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 131 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:46,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 332 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:46,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-12-15 22:02:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 227. [2021-12-15 22:02:46,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.5265486725663717) internal successors, (345), 226 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 345 transitions. [2021-12-15 22:02:46,564 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 345 transitions. Word has length 77 [2021-12-15 22:02:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:46,564 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 345 transitions. [2021-12-15 22:02:46,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 345 transitions. [2021-12-15 22:02:46,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 22:02:46,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:46,566 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:46,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-15 22:02:46,566 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:46,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash 700513709, now seen corresponding path program 1 times [2021-12-15 22:02:46,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:46,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513494111] [2021-12-15 22:02:46,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:46,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:46,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:46,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513494111] [2021-12-15 22:02:46,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513494111] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:46,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:46,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:46,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837841923] [2021-12-15 22:02:46,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:46,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:46,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:46,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:46,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:46,655 INFO L87 Difference]: Start difference. First operand 227 states and 345 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:48,661 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 [] [2021-12-15 22:02:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:48,936 INFO L93 Difference]: Finished difference Result 531 states and 810 transitions. [2021-12-15 22:02:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:48,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 22:02:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:48,942 INFO L225 Difference]: With dead ends: 531 [2021-12-15 22:02:48,942 INFO L226 Difference]: Without dead ends: 325 [2021-12-15 22:02:48,943 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 [2021-12-15 22:02:48,943 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 80 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:48,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 477 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 249 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:48,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-12-15 22:02:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 268. [2021-12-15 22:02:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 1.546816479400749) internal successors, (413), 267 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:48,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 413 transitions. [2021-12-15 22:02:48,952 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 413 transitions. Word has length 82 [2021-12-15 22:02:48,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:48,953 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 413 transitions. [2021-12-15 22:02:48,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:48,953 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 413 transitions. [2021-12-15 22:02:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-15 22:02:48,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:48,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:48,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 22:02:48,956 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:48,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1144853457, now seen corresponding path program 1 times [2021-12-15 22:02:48,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:48,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024925401] [2021-12-15 22:02:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:48,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:49,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:49,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024925401] [2021-12-15 22:02:49,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024925401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:49,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:49,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:49,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702037729] [2021-12-15 22:02:49,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:49,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:49,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:49,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:49,072 INFO L87 Difference]: Start difference. First operand 268 states and 413 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:51,083 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 [] [2021-12-15 22:02:51,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:51,417 INFO L93 Difference]: Finished difference Result 634 states and 981 transitions. [2021-12-15 22:02:51,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:51,417 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-15 22:02:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:51,419 INFO L225 Difference]: With dead ends: 634 [2021-12-15 22:02:51,419 INFO L226 Difference]: Without dead ends: 387 [2021-12-15 22:02:51,420 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 [2021-12-15 22:02:51,421 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 120 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 57 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:51,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 332 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-12-15 22:02:51,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 267. [2021-12-15 22:02:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.5488721804511278) internal successors, (412), 266 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:51,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 412 transitions. [2021-12-15 22:02:51,429 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 412 transitions. Word has length 82 [2021-12-15 22:02:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:51,430 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 412 transitions. [2021-12-15 22:02:51,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:51,430 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 412 transitions. [2021-12-15 22:02:51,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 22:02:51,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:51,431 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:51,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 22:02:51,431 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:51,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:51,432 INFO L85 PathProgramCache]: Analyzing trace with hash 233723934, now seen corresponding path program 1 times [2021-12-15 22:02:51,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:51,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700786428] [2021-12-15 22:02:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:51,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:51,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700786428] [2021-12-15 22:02:51,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700786428] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:51,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:51,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:51,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837538125] [2021-12-15 22:02:51,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:51,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:51,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:51,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:51,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:51,526 INFO L87 Difference]: Start difference. First operand 267 states and 412 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:53,533 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 [] [2021-12-15 22:02:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:53,804 INFO L93 Difference]: Finished difference Result 605 states and 936 transitions. [2021-12-15 22:02:53,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:53,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-15 22:02:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:53,807 INFO L225 Difference]: With dead ends: 605 [2021-12-15 22:02:53,807 INFO L226 Difference]: Without dead ends: 359 [2021-12-15 22:02:53,807 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 [2021-12-15 22:02:53,808 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 73 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:53,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 469 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 242 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:02:53,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-12-15 22:02:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 309. [2021-12-15 22:02:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.5616883116883118) internal successors, (481), 308 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 481 transitions. [2021-12-15 22:02:53,818 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 481 transitions. Word has length 83 [2021-12-15 22:02:53,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:53,819 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 481 transitions. [2021-12-15 22:02:53,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:53,819 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 481 transitions. [2021-12-15 22:02:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-15 22:02:53,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:53,820 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:02:53,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 22:02:53,821 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:53,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:53,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1138083364, now seen corresponding path program 1 times [2021-12-15 22:02:53,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:53,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438102138] [2021-12-15 22:02:53,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:53,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:53,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:53,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:53,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438102138] [2021-12-15 22:02:53,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438102138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:53,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:53,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:53,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847850985] [2021-12-15 22:02:53,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:53,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:53,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:53,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:53,930 INFO L87 Difference]: Start difference. First operand 309 states and 481 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:55,936 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 [] [2021-12-15 22:02:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:56,160 INFO L93 Difference]: Finished difference Result 646 states and 1009 transitions. [2021-12-15 22:02:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:56,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-15 22:02:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:56,163 INFO L225 Difference]: With dead ends: 646 [2021-12-15 22:02:56,163 INFO L226 Difference]: Without dead ends: 358 [2021-12-15 22:02:56,163 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 [2021-12-15 22:02:56,164 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 38 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:56,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 595 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-12-15 22:02:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 333. [2021-12-15 22:02:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5632530120481927) internal successors, (519), 332 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 519 transitions. [2021-12-15 22:02:56,171 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 519 transitions. Word has length 83 [2021-12-15 22:02:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:56,172 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 519 transitions. [2021-12-15 22:02:56,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 519 transitions. [2021-12-15 22:02:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 22:02:56,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:56,173 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2021-12-15 22:02:56,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-15 22:02:56,174 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:56,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:56,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1409451137, now seen corresponding path program 1 times [2021-12-15 22:02:56,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:56,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443277172] [2021-12-15 22:02:56,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:56,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:56,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:56,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443277172] [2021-12-15 22:02:56,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443277172] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:56,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:56,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:56,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734909467] [2021-12-15 22:02:56,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:56,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:56,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:56,261 INFO L87 Difference]: Start difference. First operand 333 states and 519 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:58,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:02:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:02:58,521 INFO L93 Difference]: Finished difference Result 693 states and 1078 transitions. [2021-12-15 22:02:58,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:02:58,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 22:02:58,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:02:58,524 INFO L225 Difference]: With dead ends: 693 [2021-12-15 22:02:58,524 INFO L226 Difference]: Without dead ends: 381 [2021-12-15 22:02:58,525 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 [2021-12-15 22:02:58,525 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 96 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:02:58,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 471 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 239 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 22:02:58,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-12-15 22:02:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 333. [2021-12-15 22:02:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5602409638554218) internal successors, (518), 332 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:58,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 518 transitions. [2021-12-15 22:02:58,533 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 518 transitions. Word has length 96 [2021-12-15 22:02:58,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:02:58,533 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 518 transitions. [2021-12-15 22:02:58,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:02:58,534 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 518 transitions. [2021-12-15 22:02:58,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-15 22:02:58,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:02:58,535 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2021-12-15 22:02:58,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-15 22:02:58,535 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:02:58,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:02:58,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1853351811, now seen corresponding path program 1 times [2021-12-15 22:02:58,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:02:58,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708977964] [2021-12-15 22:02:58,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:02:58,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:02:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:02:58,618 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:02:58,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:02:58,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708977964] [2021-12-15 22:02:58,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708977964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:02:58,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:02:58,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:02:58,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522453442] [2021-12-15 22:02:58,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:02:58,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:02:58,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:02:58,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:02:58,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:02:58,621 INFO L87 Difference]: Start difference. First operand 333 states and 518 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:00,242 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 [] [2021-12-15 22:03:00,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:00,430 INFO L93 Difference]: Finished difference Result 668 states and 1042 transitions. [2021-12-15 22:03:00,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:00,431 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-15 22:03:00,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:00,432 INFO L225 Difference]: With dead ends: 668 [2021-12-15 22:03:00,432 INFO L226 Difference]: Without dead ends: 356 [2021-12-15 22:03:00,432 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 [2021-12-15 22:03:00,433 INFO L933 BasicCegarLoop]: 245 mSDtfsCounter, 45 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:00,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 595 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 22:03:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-12-15 22:03:00,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 333. [2021-12-15 22:03:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5572289156626506) internal successors, (517), 332 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 517 transitions. [2021-12-15 22:03:00,457 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 517 transitions. Word has length 96 [2021-12-15 22:03:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:00,458 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 517 transitions. [2021-12-15 22:03:00,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 517 transitions. [2021-12-15 22:03:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 22:03:00,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:00,459 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:00,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-15 22:03:00,460 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:00,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash 436925762, now seen corresponding path program 1 times [2021-12-15 22:03:00,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:00,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121620138] [2021-12-15 22:03:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:00,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:00,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:00,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121620138] [2021-12-15 22:03:00,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121620138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:00,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:00,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:00,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201583773] [2021-12-15 22:03:00,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:00,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:00,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:00,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:00,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:00,545 INFO L87 Difference]: Start difference. First operand 333 states and 517 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:02,552 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 [] [2021-12-15 22:03:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:02,905 INFO L93 Difference]: Finished difference Result 733 states and 1140 transitions. [2021-12-15 22:03:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:02,905 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-15 22:03:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:02,907 INFO L225 Difference]: With dead ends: 733 [2021-12-15 22:03:02,907 INFO L226 Difference]: Without dead ends: 421 [2021-12-15 22:03:02,908 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 [2021-12-15 22:03:02,908 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 148 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 336 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 [2021-12-15 22:03:02,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 336 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 257 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:02,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-12-15 22:03:02,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 333. [2021-12-15 22:03:02,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.5421686746987953) internal successors, (512), 332 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:02,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 512 transitions. [2021-12-15 22:03:02,916 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 512 transitions. Word has length 97 [2021-12-15 22:03:02,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:02,916 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 512 transitions. [2021-12-15 22:03:02,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:02,916 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 512 transitions. [2021-12-15 22:03:02,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-15 22:03:02,917 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:02,917 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-12-15 22:03:02,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-15 22:03:02,918 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:02,918 INFO L85 PathProgramCache]: Analyzing trace with hash -610585042, now seen corresponding path program 1 times [2021-12-15 22:03:02,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:02,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798603224] [2021-12-15 22:03:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:02,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-15 22:03:03,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:03,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798603224] [2021-12-15 22:03:03,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798603224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:03,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:03,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-15 22:03:03,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419453690] [2021-12-15 22:03:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:03,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 22:03:03,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 22:03:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:03:03,024 INFO L87 Difference]: Start difference. First operand 333 states and 512 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2021-12-15 22:03:05,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:03:07,053 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-15 22:03:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:07,351 INFO L93 Difference]: Finished difference Result 655 states and 1012 transitions. [2021-12-15 22:03:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-15 22:03:07,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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 [2021-12-15 22:03:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:07,353 INFO L225 Difference]: With dead ends: 655 [2021-12-15 22:03:07,353 INFO L226 Difference]: Without dead ends: 343 [2021-12-15 22:03:07,354 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 [2021-12-15 22:03:07,355 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 152 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 354 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 [2021-12-15 22:03:07,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 354 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 310 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2021-12-15 22:03:07,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-12-15 22:03:07,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 342. [2021-12-15 22:03:07,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.533724340175953) internal successors, (523), 341 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 523 transitions. [2021-12-15 22:03:07,363 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 523 transitions. Word has length 97 [2021-12-15 22:03:07,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:07,363 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 523 transitions. [2021-12-15 22:03:07,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 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) [2021-12-15 22:03:07,364 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 523 transitions. [2021-12-15 22:03:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-15 22:03:07,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:07,365 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:07,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-15 22:03:07,365 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:07,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1076896027, now seen corresponding path program 1 times [2021-12-15 22:03:07,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:07,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198889115] [2021-12-15 22:03:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:07,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:07,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:07,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198889115] [2021-12-15 22:03:07,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198889115] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:07,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:07,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:07,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401784802] [2021-12-15 22:03:07,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:07,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:07,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:07,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:07,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:07,460 INFO L87 Difference]: Start difference. First operand 342 states and 523 transitions. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,468 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 [] [2021-12-15 22:03:09,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:09,767 INFO L93 Difference]: Finished difference Result 751 states and 1151 transitions. [2021-12-15 22:03:09,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:09,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-15 22:03:09,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:09,768 INFO L225 Difference]: With dead ends: 751 [2021-12-15 22:03:09,769 INFO L226 Difference]: Without dead ends: 430 [2021-12-15 22:03:09,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:03:09,770 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 146 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 58 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:09,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 338 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 255 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:09,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-12-15 22:03:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 342. [2021-12-15 22:03:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5190615835777126) internal successors, (518), 341 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 518 transitions. [2021-12-15 22:03:09,778 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 518 transitions. Word has length 98 [2021-12-15 22:03:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:09,779 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 518 transitions. [2021-12-15 22:03:09,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 518 transitions. [2021-12-15 22:03:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-15 22:03:09,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:09,780 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:09,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-15 22:03:09,781 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:09,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash 742256768, now seen corresponding path program 1 times [2021-12-15 22:03:09,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:09,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524690010] [2021-12-15 22:03:09,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:09,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:09,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:09,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524690010] [2021-12-15 22:03:09,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524690010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:09,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:09,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:09,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784134665] [2021-12-15 22:03:09,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:09,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:09,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:09,871 INFO L87 Difference]: Start difference. First operand 342 states and 518 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) [2021-12-15 22:03:11,878 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 [] [2021-12-15 22:03:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:03:12,184 INFO L93 Difference]: Finished difference Result 700 states and 1062 transitions. [2021-12-15 22:03:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:03:12,186 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 101 [2021-12-15 22:03:12,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:03:12,187 INFO L225 Difference]: With dead ends: 700 [2021-12-15 22:03:12,187 INFO L226 Difference]: Without dead ends: 379 [2021-12-15 22:03:12,188 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 [2021-12-15 22:03:12,188 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 87 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:03:12,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 487 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:03:12,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-12-15 22:03:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 342. [2021-12-15 22:03:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.5161290322580645) internal successors, (517), 341 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:03:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 517 transitions. [2021-12-15 22:03:12,196 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 517 transitions. Word has length 101 [2021-12-15 22:03:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:03:12,196 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 517 transitions. [2021-12-15 22:03:12,196 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) [2021-12-15 22:03:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 517 transitions. [2021-12-15 22:03:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-15 22:03:12,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:03:12,197 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2021-12-15 22:03:12,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-15 22:03:12,198 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:03:12,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:03:12,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1175985854, now seen corresponding path program 1 times [2021-12-15 22:03:12,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:03:12,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114444601] [2021-12-15 22:03:12,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:03:12,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:03:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:03:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-15 22:03:12,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:03:12,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114444601] [2021-12-15 22:03:12,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114444601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:03:12,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:03:12,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:03:12,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312319545] [2021-12-15 22:03:12,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:03:12,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:03:12,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:03:12,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:03:12,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:03:12,289 INFO L87 Difference]: Start difference. First operand 342 states and 517 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)