./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.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 2c167e2ddaf8948d5e7bd26982f4dbc66059753c7303cdae96f611484751ca27 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:08:57,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:08:57,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:08:57,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:08:57,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:08:57,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:08:57,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:08:57,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:08:57,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:08:57,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:08:57,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:08:57,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:08:57,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:08:57,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:08:57,421 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:08:57,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:08:57,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:08:57,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:08:57,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:08:57,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:08:57,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:08:57,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:08:57,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:08:57,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:08:57,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:08:57,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:08:57,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:08:57,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:08:57,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:08:57,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:08:57,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:08:57,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:08:57,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:08:57,450 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:08:57,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:08:57,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:08:57,452 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:08:57,452 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:08:57,452 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:08:57,453 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:08:57,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:08:57,454 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:08:57,492 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:08:57,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:08:57,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:08:57,493 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:08:57,494 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:08:57,494 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:08:57,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:08:57,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:08:57,495 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:08:57,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:08:57,496 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:08:57,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:08:57,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:08:57,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:08:57,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:08:57,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:08:57,498 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:08:57,498 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:08:57,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:08:57,498 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:08:57,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:08:57,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:08:57,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:08:57,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:08:57,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:08:57,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:08:57,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:08:57,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:08:57,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:08:57,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:08:57,502 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:08:57,502 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:08:57,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:08:57,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:08:57,503 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2c167e2ddaf8948d5e7bd26982f4dbc66059753c7303cdae96f611484751ca27 [2021-12-14 16:08:57,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:08:57,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:08:57,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:08:57,797 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:08:57,798 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:08:57,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c [2021-12-14 16:08:57,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/771801ea9/a5e28fd08b284373932c455a63270174/FLAG440d16046 [2021-12-14 16:08:58,515 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:08:58,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c [2021-12-14 16:08:58,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/771801ea9/a5e28fd08b284373932c455a63270174/FLAG440d16046 [2021-12-14 16:08:58,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/771801ea9/a5e28fd08b284373932c455a63270174 [2021-12-14 16:08:58,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:08:58,868 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:08:58,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:08:58,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:08:58,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:08:58,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:08:58" (1/1) ... [2021-12-14 16:08:58,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dbb18a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:08:58, skipping insertion in model container [2021-12-14 16:08:58,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:08:58" (1/1) ... [2021-12-14 16:08:58,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:08:58,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:08:59,255 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c[15482,15495] [2021-12-14 16:08:59,320 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c[22418,22431] [2021-12-14 16:08:59,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:08:59,927 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:08:59,968 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c[15482,15495] [2021-12-14 16:08:59,978 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/combinations/pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c[22418,22431] [2021-12-14 16:09:00,354 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:09:00,378 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:09:00,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00 WrapperNode [2021-12-14 16:09:00,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:09:00,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:09:00,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:09:00,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:09:00,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (1/1) ... [2021-12-14 16:09:00,445 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (1/1) ... [2021-12-14 16:09:00,889 INFO L137 Inliner]: procedures = 37, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5149 [2021-12-14 16:09:00,890 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:09:00,891 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:09:00,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:09:00,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:09:00,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (1/1) ... [2021-12-14 16:09:00,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (1/1) ... [2021-12-14 16:09:00,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (1/1) ... [2021-12-14 16:09:00,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (1/1) ... [2021-12-14 16:09:01,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (1/1) ... [2021-12-14 16:09:01,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (1/1) ... [2021-12-14 16:09:01,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (1/1) ... [2021-12-14 16:09:01,324 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:09:01,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:09:01,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:09:01,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:09:01,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (1/1) ... [2021-12-14 16:09:01,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:09:01,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:09:01,397 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) [2021-12-14 16:09:01,459 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 [2021-12-14 16:09:01,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:09:01,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:09:01,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:09:01,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:09:01,659 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:09:01,660 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:09:05,002 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:09:05,014 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:09:05,015 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:09:05,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:09:05 BoogieIcfgContainer [2021-12-14 16:09:05,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:09:05,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:09:05,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:09:05,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:09:05,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:08:58" (1/3) ... [2021-12-14 16:09:05,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bf2034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:09:05, skipping insertion in model container [2021-12-14 16:09:05,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:09:00" (2/3) ... [2021-12-14 16:09:05,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61bf2034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:09:05, skipping insertion in model container [2021-12-14 16:09:05,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:09:05" (3/3) ... [2021-12-14 16:09:05,025 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals+Problem12_label05.c [2021-12-14 16:09:05,029 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:09:05,030 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:09:05,073 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:09:05,079 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 [2021-12-14 16:09:05,079 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:09:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 16:09:05,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:05,115 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:05,116 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:05,121 INFO L85 PathProgramCache]: Analyzing trace with hash 340623278, now seen corresponding path program 1 times [2021-12-14 16:09:05,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:05,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218885489] [2021-12-14 16:09:05,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:05,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:05,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:05,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218885489] [2021-12-14 16:09:05,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218885489] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:05,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:05,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:09:05,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699834393] [2021-12-14 16:09:05,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:05,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 16:09:05,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:05,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 16:09:05,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:09:05,337 INFO L87 Difference]: Start difference. First operand has 926 states, 923 states have (on average 1.8992416034669555) internal successors, (1753), 925 states have internal predecessors, (1753), 0 states have call successors, (0), 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 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:05,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:05,422 INFO L93 Difference]: Finished difference Result 1806 states and 3418 transitions. [2021-12-14 16:09:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 16:09:05,424 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-14 16:09:05,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:05,445 INFO L225 Difference]: With dead ends: 1806 [2021-12-14 16:09:05,445 INFO L226 Difference]: Without dead ends: 860 [2021-12-14 16:09:05,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 16:09:05,457 INFO L933 BasicCegarLoop]: 1687 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:05,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-12-14 16:09:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2021-12-14 16:09:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 858 states have (on average 1.8881118881118881) internal successors, (1620), 859 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1620 transitions. [2021-12-14 16:09:05,543 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1620 transitions. Word has length 38 [2021-12-14 16:09:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:05,544 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1620 transitions. [2021-12-14 16:09:05,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1620 transitions. [2021-12-14 16:09:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-14 16:09:05,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:05,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:05,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:09:05,550 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:05,553 INFO L85 PathProgramCache]: Analyzing trace with hash 615382892, now seen corresponding path program 1 times [2021-12-14 16:09:05,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:05,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293618455] [2021-12-14 16:09:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:05,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:05,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:05,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:05,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293618455] [2021-12-14 16:09:05,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293618455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:05,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:05,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:09:05,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874686072] [2021-12-14 16:09:05,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:05,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:09:05,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:05,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:09:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:09:05,760 INFO L87 Difference]: Start difference. First operand 860 states and 1620 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:05,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:05,900 INFO L93 Difference]: Finished difference Result 924 states and 1719 transitions. [2021-12-14 16:09:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:09:05,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-12-14 16:09:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:05,904 INFO L225 Difference]: With dead ends: 924 [2021-12-14 16:09:05,904 INFO L226 Difference]: Without dead ends: 860 [2021-12-14 16:09:05,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 16:09:05,906 INFO L933 BasicCegarLoop]: 1618 mSDtfsCounter, 3 mSDsluCounter, 4811 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6429 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:05,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6429 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:09:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2021-12-14 16:09:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 860. [2021-12-14 16:09:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 858 states have (on average 1.8414918414918415) internal successors, (1580), 859 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1580 transitions. [2021-12-14 16:09:05,926 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1580 transitions. Word has length 38 [2021-12-14 16:09:05,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:05,926 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 1580 transitions. [2021-12-14 16:09:05,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1580 transitions. [2021-12-14 16:09:05,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-14 16:09:05,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:05,928 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:05,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:09:05,929 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:05,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:05,930 INFO L85 PathProgramCache]: Analyzing trace with hash -117834811, now seen corresponding path program 1 times [2021-12-14 16:09:05,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:05,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904021570] [2021-12-14 16:09:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:05,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:06,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:06,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904021570] [2021-12-14 16:09:06,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904021570] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:06,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:06,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:09:06,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317414872] [2021-12-14 16:09:06,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:06,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 16:09:06,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:06,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 16:09:06,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 16:09:06,054 INFO L87 Difference]: Start difference. First operand 860 states and 1580 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:12,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:12,137 INFO L93 Difference]: Finished difference Result 3115 states and 5889 transitions. [2021-12-14 16:09:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 16:09:12,139 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-12-14 16:09:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:12,150 INFO L225 Difference]: With dead ends: 3115 [2021-12-14 16:09:12,151 INFO L226 Difference]: Without dead ends: 2362 [2021-12-14 16:09:12,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:09:12,159 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 2463 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5518 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2463 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 6618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 5518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:12,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2463 Valid, 852 Invalid, 6618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 5518 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-14 16:09:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2362 states. [2021-12-14 16:09:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2362 to 2362. [2021-12-14 16:09:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2362 states, 2360 states have (on average 1.5703389830508474) internal successors, (3706), 2361 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2362 states to 2362 states and 3706 transitions. [2021-12-14 16:09:12,208 INFO L78 Accepts]: Start accepts. Automaton has 2362 states and 3706 transitions. Word has length 60 [2021-12-14 16:09:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:12,209 INFO L470 AbstractCegarLoop]: Abstraction has 2362 states and 3706 transitions. [2021-12-14 16:09:12,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2362 states and 3706 transitions. [2021-12-14 16:09:12,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:09:12,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:12,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:12,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:09:12,212 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:12,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:12,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2101054792, now seen corresponding path program 1 times [2021-12-14 16:09:12,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:12,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14538052] [2021-12-14 16:09:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:12,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:12,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:12,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14538052] [2021-12-14 16:09:12,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14538052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:12,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:12,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:09:12,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341289892] [2021-12-14 16:09:12,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:12,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:09:12,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:12,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:09:12,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:12,269 INFO L87 Difference]: Start difference. First operand 2362 states and 3706 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:12,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:12,302 INFO L93 Difference]: Finished difference Result 2476 states and 3886 transitions. [2021-12-14 16:09:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:09:12,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 16:09:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:12,311 INFO L225 Difference]: With dead ends: 2476 [2021-12-14 16:09:12,312 INFO L226 Difference]: Without dead ends: 2416 [2021-12-14 16:09:12,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:12,323 INFO L933 BasicCegarLoop]: 1661 mSDtfsCounter, 1524 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1524 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:12,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1524 Valid, 1754 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-12-14 16:09:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2414. [2021-12-14 16:09:12,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2412 states have (on average 1.5708955223880596) internal successors, (3789), 2413 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 3789 transitions. [2021-12-14 16:09:12,395 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 3789 transitions. Word has length 77 [2021-12-14 16:09:12,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:12,396 INFO L470 AbstractCegarLoop]: Abstraction has 2414 states and 3789 transitions. [2021-12-14 16:09:12,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 3789 transitions. [2021-12-14 16:09:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:09:12,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:12,397 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:12,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:09:12,398 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:12,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1452480302, now seen corresponding path program 1 times [2021-12-14 16:09:12,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:12,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639496089] [2021-12-14 16:09:12,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:12,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:12,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:12,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:12,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639496089] [2021-12-14 16:09:12,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639496089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:12,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:12,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:09:12,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360387777] [2021-12-14 16:09:12,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:12,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:09:12,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:12,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:09:12,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:12,452 INFO L87 Difference]: Start difference. First operand 2414 states and 3789 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:12,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:12,484 INFO L93 Difference]: Finished difference Result 2626 states and 4125 transitions. [2021-12-14 16:09:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:09:12,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 16:09:12,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:12,494 INFO L225 Difference]: With dead ends: 2626 [2021-12-14 16:09:12,494 INFO L226 Difference]: Without dead ends: 2514 [2021-12-14 16:09:12,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:12,496 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1504 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1504 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:12,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1504 Valid, 1717 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:12,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2021-12-14 16:09:12,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 2512. [2021-12-14 16:09:12,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 2510 states have (on average 1.5713147410358566) internal successors, (3944), 2511 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 3944 transitions. [2021-12-14 16:09:12,546 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 3944 transitions. Word has length 77 [2021-12-14 16:09:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:12,546 INFO L470 AbstractCegarLoop]: Abstraction has 2512 states and 3944 transitions. [2021-12-14 16:09:12,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 3944 transitions. [2021-12-14 16:09:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-14 16:09:12,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:12,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:12,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:09:12,548 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:12,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1624501596, now seen corresponding path program 1 times [2021-12-14 16:09:12,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:12,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931947221] [2021-12-14 16:09:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:12,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:12,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:12,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:12,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931947221] [2021-12-14 16:09:12,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931947221] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:12,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:12,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:09:12,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575316094] [2021-12-14 16:09:12,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:12,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:09:12,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:12,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:09:12,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:09:12,646 INFO L87 Difference]: Start difference. First operand 2512 states and 3944 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:12,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:12,945 INFO L93 Difference]: Finished difference Result 5032 states and 7940 transitions. [2021-12-14 16:09:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-14 16:09:12,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-14 16:09:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:12,969 INFO L225 Difference]: With dead ends: 5032 [2021-12-14 16:09:12,970 INFO L226 Difference]: Without dead ends: 4822 [2021-12-14 16:09:12,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-14 16:09:12,976 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 10491 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10491 SdHoareTripleChecker+Valid, 2765 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:12,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10491 Valid, 2765 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:09:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2021-12-14 16:09:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 2720. [2021-12-14 16:09:13,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2720 states, 2718 states have (on average 1.5702722590139808) internal successors, (4268), 2719 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2720 states to 2720 states and 4268 transitions. [2021-12-14 16:09:13,061 INFO L78 Accepts]: Start accepts. Automaton has 2720 states and 4268 transitions. Word has length 77 [2021-12-14 16:09:13,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:13,062 INFO L470 AbstractCegarLoop]: Abstraction has 2720 states and 4268 transitions. [2021-12-14 16:09:13,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:13,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2720 states and 4268 transitions. [2021-12-14 16:09:13,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:09:13,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:13,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:13,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:09:13,064 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:13,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:13,065 INFO L85 PathProgramCache]: Analyzing trace with hash 806369108, now seen corresponding path program 1 times [2021-12-14 16:09:13,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:13,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940866922] [2021-12-14 16:09:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:13,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:13,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:13,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940866922] [2021-12-14 16:09:13,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940866922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:13,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:13,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:09:13,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925125153] [2021-12-14 16:09:13,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:13,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:09:13,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:13,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:09:13,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:13,125 INFO L87 Difference]: Start difference. First operand 2720 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:13,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:13,230 INFO L93 Difference]: Finished difference Result 3340 states and 5240 transitions. [2021-12-14 16:09:13,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:09:13,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 16:09:13,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:13,243 INFO L225 Difference]: With dead ends: 3340 [2021-12-14 16:09:13,243 INFO L226 Difference]: Without dead ends: 2922 [2021-12-14 16:09:13,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:13,245 INFO L933 BasicCegarLoop]: 1585 mSDtfsCounter, 1496 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1496 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:13,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1496 Valid, 1675 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2021-12-14 16:09:13,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2021-12-14 16:09:13,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2918 states have (on average 1.5681973954763537) internal successors, (4576), 2919 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4576 transitions. [2021-12-14 16:09:13,330 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4576 transitions. Word has length 79 [2021-12-14 16:09:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:13,330 INFO L470 AbstractCegarLoop]: Abstraction has 2920 states and 4576 transitions. [2021-12-14 16:09:13,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:13,331 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4576 transitions. [2021-12-14 16:09:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:09:13,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:13,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:13,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:09:13,333 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:13,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:13,334 INFO L85 PathProgramCache]: Analyzing trace with hash 872862620, now seen corresponding path program 1 times [2021-12-14 16:09:13,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:13,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728313535] [2021-12-14 16:09:13,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:13,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:13,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:13,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728313535] [2021-12-14 16:09:13,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728313535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:13,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:13,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:09:13,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500178480] [2021-12-14 16:09:13,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:13,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:09:13,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:09:13,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:09:13,523 INFO L87 Difference]: Start difference. First operand 2920 states and 4576 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:13,760 INFO L93 Difference]: Finished difference Result 3538 states and 5540 transitions. [2021-12-14 16:09:13,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:09:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 16:09:13,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:13,771 INFO L225 Difference]: With dead ends: 3538 [2021-12-14 16:09:13,771 INFO L226 Difference]: Without dead ends: 2922 [2021-12-14 16:09:13,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-14 16:09:13,774 INFO L933 BasicCegarLoop]: 1597 mSDtfsCounter, 3281 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3281 SdHoareTripleChecker+Valid, 2067 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:13,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3281 Valid, 2067 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:09:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2021-12-14 16:09:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2021-12-14 16:09:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2920 states, 2918 states have (on average 1.5661411925976696) internal successors, (4570), 2919 states have internal predecessors, (4570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4570 transitions. [2021-12-14 16:09:13,853 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4570 transitions. Word has length 79 [2021-12-14 16:09:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:13,854 INFO L470 AbstractCegarLoop]: Abstraction has 2920 states and 4570 transitions. [2021-12-14 16:09:13,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:13,854 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4570 transitions. [2021-12-14 16:09:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:09:13,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:13,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:13,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:09:13,856 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:13,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:13,856 INFO L85 PathProgramCache]: Analyzing trace with hash -385682984, now seen corresponding path program 1 times [2021-12-14 16:09:13,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:13,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245858580] [2021-12-14 16:09:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:13,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:13,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:13,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:13,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245858580] [2021-12-14 16:09:13,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245858580] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:13,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:13,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:09:13,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518105000] [2021-12-14 16:09:13,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:13,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:09:13,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:13,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:09:13,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:13,896 INFO L87 Difference]: Start difference. First operand 2920 states and 4570 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:13,965 INFO L93 Difference]: Finished difference Result 4080 states and 6364 transitions. [2021-12-14 16:09:13,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:09:13,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 16:09:13,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:13,978 INFO L225 Difference]: With dead ends: 4080 [2021-12-14 16:09:13,978 INFO L226 Difference]: Without dead ends: 3464 [2021-12-14 16:09:13,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:13,983 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1508 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1508 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:13,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1508 Valid, 1726 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:13,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-12-14 16:09:14,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3462. [2021-12-14 16:09:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3462 states, 3460 states have (on average 1.5589595375722543) internal successors, (5394), 3461 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:14,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3462 states to 3462 states and 5394 transitions. [2021-12-14 16:09:14,087 INFO L78 Accepts]: Start accepts. Automaton has 3462 states and 5394 transitions. Word has length 79 [2021-12-14 16:09:14,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:14,087 INFO L470 AbstractCegarLoop]: Abstraction has 3462 states and 5394 transitions. [2021-12-14 16:09:14,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:14,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3462 states and 5394 transitions. [2021-12-14 16:09:14,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:09:14,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:14,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:14,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:09:14,093 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash -111995272, now seen corresponding path program 1 times [2021-12-14 16:09:14,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:14,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161383635] [2021-12-14 16:09:14,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:14,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:14,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:14,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161383635] [2021-12-14 16:09:14,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161383635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:14,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:14,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:09:14,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227168105] [2021-12-14 16:09:14,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:14,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:09:14,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:14,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:09:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:14,146 INFO L87 Difference]: Start difference. First operand 3462 states and 5394 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:14,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:14,250 INFO L93 Difference]: Finished difference Result 5634 states and 8716 transitions. [2021-12-14 16:09:14,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:09:14,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 16:09:14,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:14,263 INFO L225 Difference]: With dead ends: 5634 [2021-12-14 16:09:14,263 INFO L226 Difference]: Without dead ends: 4476 [2021-12-14 16:09:14,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:14,268 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 1512 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1735 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:14,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 1735 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2021-12-14 16:09:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 4474. [2021-12-14 16:09:14,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4472 states have (on average 1.545169946332737) internal successors, (6910), 4473 states have internal predecessors, (6910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 6910 transitions. [2021-12-14 16:09:14,424 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 6910 transitions. Word has length 79 [2021-12-14 16:09:14,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:14,425 INFO L470 AbstractCegarLoop]: Abstraction has 4474 states and 6910 transitions. [2021-12-14 16:09:14,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:14,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 6910 transitions. [2021-12-14 16:09:14,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:09:14,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:14,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:14,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:09:14,427 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1707076376, now seen corresponding path program 1 times [2021-12-14 16:09:14,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:14,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138371563] [2021-12-14 16:09:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:14,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:14,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:14,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:14,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138371563] [2021-12-14 16:09:14,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138371563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:14,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:14,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:09:14,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416018556] [2021-12-14 16:09:14,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:14,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:09:14,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:09:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:14,467 INFO L87 Difference]: Start difference. First operand 4474 states and 6910 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:14,681 INFO L93 Difference]: Finished difference Result 8526 states and 13024 transitions. [2021-12-14 16:09:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:09:14,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 16:09:14,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:14,694 INFO L225 Difference]: With dead ends: 8526 [2021-12-14 16:09:14,694 INFO L226 Difference]: Without dead ends: 6356 [2021-12-14 16:09:14,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:14,700 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 1516 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:14,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6356 states. [2021-12-14 16:09:14,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6356 to 6354. [2021-12-14 16:09:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6354 states, 6352 states have (on average 1.5236146095717884) internal successors, (9678), 6353 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 9678 transitions. [2021-12-14 16:09:14,941 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 9678 transitions. Word has length 79 [2021-12-14 16:09:14,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:14,942 INFO L470 AbstractCegarLoop]: Abstraction has 6354 states and 9678 transitions. [2021-12-14 16:09:14,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:14,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 9678 transitions. [2021-12-14 16:09:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-14 16:09:14,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:14,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:14,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:09:14,944 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:14,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1886482360, now seen corresponding path program 1 times [2021-12-14 16:09:14,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:14,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675263855] [2021-12-14 16:09:14,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:14,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:14,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:14,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675263855] [2021-12-14 16:09:14,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675263855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:14,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:14,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:09:14,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158601977] [2021-12-14 16:09:14,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:14,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:09:14,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:14,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:09:14,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:14,979 INFO L87 Difference]: Start difference. First operand 6354 states and 9678 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:15,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:15,282 INFO L93 Difference]: Finished difference Result 13878 states and 20848 transitions. [2021-12-14 16:09:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:09:15,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-14 16:09:15,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:15,306 INFO L225 Difference]: With dead ends: 13878 [2021-12-14 16:09:15,306 INFO L226 Difference]: Without dead ends: 9828 [2021-12-14 16:09:15,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:15,316 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 1520 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:15,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9828 states. [2021-12-14 16:09:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9828 to 9826. [2021-12-14 16:09:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9826 states, 9824 states have (on average 1.4949104234527688) internal successors, (14686), 9825 states have internal predecessors, (14686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9826 states to 9826 states and 14686 transitions. [2021-12-14 16:09:15,844 INFO L78 Accepts]: Start accepts. Automaton has 9826 states and 14686 transitions. Word has length 79 [2021-12-14 16:09:15,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:15,844 INFO L470 AbstractCegarLoop]: Abstraction has 9826 states and 14686 transitions. [2021-12-14 16:09:15,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:15,845 INFO L276 IsEmpty]: Start isEmpty. Operand 9826 states and 14686 transitions. [2021-12-14 16:09:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-14 16:09:15,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:15,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:15,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:09:15,847 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:15,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash 874214487, now seen corresponding path program 1 times [2021-12-14 16:09:15,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:15,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843917499] [2021-12-14 16:09:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:15,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:15,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:15,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843917499] [2021-12-14 16:09:15,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843917499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:15,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:15,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:09:15,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166562726] [2021-12-14 16:09:15,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:15,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:09:15,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:15,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:09:15,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:09:15,929 INFO L87 Difference]: Start difference. First operand 9826 states and 14686 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:16,542 INFO L93 Difference]: Finished difference Result 16289 states and 23957 transitions. [2021-12-14 16:09:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:09:16,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-14 16:09:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:16,579 INFO L225 Difference]: With dead ends: 16289 [2021-12-14 16:09:16,580 INFO L226 Difference]: Without dead ends: 16287 [2021-12-14 16:09:16,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:09:16,589 INFO L933 BasicCegarLoop]: 1612 mSDtfsCounter, 256 mSDsluCounter, 4733 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 6345 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:16,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 6345 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16287 states. [2021-12-14 16:09:17,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16287 to 10210. [2021-12-14 16:09:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10208 states have (on average 1.4731583072100314) internal successors, (15038), 10209 states have internal predecessors, (15038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 15038 transitions. [2021-12-14 16:09:17,179 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 15038 transitions. Word has length 80 [2021-12-14 16:09:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:17,179 INFO L470 AbstractCegarLoop]: Abstraction has 10210 states and 15038 transitions. [2021-12-14 16:09:17,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:17,180 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 15038 transitions. [2021-12-14 16:09:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:09:17,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:17,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:17,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:09:17,186 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:17,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:17,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1411161737, now seen corresponding path program 1 times [2021-12-14 16:09:17,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:17,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396042013] [2021-12-14 16:09:17,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:17,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-14 16:09:17,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:17,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396042013] [2021-12-14 16:09:17,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396042013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:17,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:17,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:09:17,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932017451] [2021-12-14 16:09:17,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:17,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:09:17,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:09:17,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:09:17,284 INFO L87 Difference]: Start difference. First operand 10210 states and 15038 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:19,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:19,079 INFO L93 Difference]: Finished difference Result 59216 states and 85749 transitions. [2021-12-14 16:09:19,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:09:19,080 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:09:19,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:19,224 INFO L225 Difference]: With dead ends: 59216 [2021-12-14 16:09:19,224 INFO L226 Difference]: Without dead ends: 51310 [2021-12-14 16:09:19,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:09:19,254 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8617 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8617 SdHoareTripleChecker+Valid, 3801 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:19,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8617 Valid, 3801 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:09:19,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51310 states. [2021-12-14 16:09:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51310 to 18114. [2021-12-14 16:09:20,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18114 states, 18112 states have (on average 1.4557199646643109) internal successors, (26366), 18113 states have internal predecessors, (26366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18114 states to 18114 states and 26366 transitions. [2021-12-14 16:09:20,421 INFO L78 Accepts]: Start accepts. Automaton has 18114 states and 26366 transitions. Word has length 112 [2021-12-14 16:09:20,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:20,421 INFO L470 AbstractCegarLoop]: Abstraction has 18114 states and 26366 transitions. [2021-12-14 16:09:20,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 18114 states and 26366 transitions. [2021-12-14 16:09:20,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:09:20,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:20,429 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:20,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:09:20,430 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:20,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:20,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1381639519, now seen corresponding path program 1 times [2021-12-14 16:09:20,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:20,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386020210] [2021-12-14 16:09:20,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:20,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 16:09:20,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:20,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386020210] [2021-12-14 16:09:20,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386020210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:20,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:20,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:09:20,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39257457] [2021-12-14 16:09:20,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:20,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:09:20,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:09:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:09:20,521 INFO L87 Difference]: Start difference. First operand 18114 states and 26366 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:22,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:22,550 INFO L93 Difference]: Finished difference Result 67120 states and 97077 transitions. [2021-12-14 16:09:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:09:22,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:09:22,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:22,691 INFO L225 Difference]: With dead ends: 67120 [2021-12-14 16:09:22,691 INFO L226 Difference]: Without dead ends: 59214 [2021-12-14 16:09:22,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:09:22,718 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8440 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8440 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:22,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8440 Valid, 3881 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:09:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59214 states. [2021-12-14 16:09:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59214 to 29986. [2021-12-14 16:09:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29986 states, 29984 states have (on average 1.4433697972251867) internal successors, (43278), 29985 states have internal predecessors, (43278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29986 states to 29986 states and 43278 transitions. [2021-12-14 16:09:24,286 INFO L78 Accepts]: Start accepts. Automaton has 29986 states and 43278 transitions. Word has length 112 [2021-12-14 16:09:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:24,287 INFO L470 AbstractCegarLoop]: Abstraction has 29986 states and 43278 transitions. [2021-12-14 16:09:24,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 29986 states and 43278 transitions. [2021-12-14 16:09:24,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:09:24,297 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:24,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:24,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:09:24,298 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:24,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:24,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1107951807, now seen corresponding path program 1 times [2021-12-14 16:09:24,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:24,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953626225] [2021-12-14 16:09:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:24,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-14 16:09:24,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:24,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953626225] [2021-12-14 16:09:24,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953626225] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:24,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:24,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:09:24,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487283323] [2021-12-14 16:09:24,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:24,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:09:24,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:24,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:09:24,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:09:24,400 INFO L87 Difference]: Start difference. First operand 29986 states and 43278 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:27,139 INFO L93 Difference]: Finished difference Result 75024 states and 108405 transitions. [2021-12-14 16:09:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:09:27,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:09:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:27,274 INFO L225 Difference]: With dead ends: 75024 [2021-12-14 16:09:27,275 INFO L226 Difference]: Without dead ends: 67118 [2021-12-14 16:09:27,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:09:27,297 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8408 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8408 SdHoareTripleChecker+Valid, 3921 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:27,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8408 Valid, 3921 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:09:27,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67118 states. [2021-12-14 16:09:29,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67118 to 37890. [2021-12-14 16:09:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37890 states, 37888 states have (on average 1.4412478885135136) internal successors, (54606), 37889 states have internal predecessors, (54606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37890 states to 37890 states and 54606 transitions. [2021-12-14 16:09:29,168 INFO L78 Accepts]: Start accepts. Automaton has 37890 states and 54606 transitions. Word has length 112 [2021-12-14 16:09:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:29,169 INFO L470 AbstractCegarLoop]: Abstraction has 37890 states and 54606 transitions. [2021-12-14 16:09:29,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 37890 states and 54606 transitions. [2021-12-14 16:09:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:09:29,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:29,179 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:29,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:09:29,180 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:29,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:29,181 INFO L85 PathProgramCache]: Analyzing trace with hash 711119841, now seen corresponding path program 1 times [2021-12-14 16:09:29,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:29,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910686249] [2021-12-14 16:09:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:29,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 16:09:29,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:29,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910686249] [2021-12-14 16:09:29,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910686249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:29,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:29,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:09:29,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696295932] [2021-12-14 16:09:29,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:29,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:09:29,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:09:29,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:09:29,269 INFO L87 Difference]: Start difference. First operand 37890 states and 54606 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:32,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:32,525 INFO L93 Difference]: Finished difference Result 82928 states and 119733 transitions. [2021-12-14 16:09:32,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:09:32,526 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:09:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:32,667 INFO L225 Difference]: With dead ends: 82928 [2021-12-14 16:09:32,667 INFO L226 Difference]: Without dead ends: 75022 [2021-12-14 16:09:32,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:09:32,700 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 8476 mSDsluCounter, 2272 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8476 SdHoareTripleChecker+Valid, 3937 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:32,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8476 Valid, 3937 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:09:32,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75022 states. [2021-12-14 16:09:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75022 to 45794. [2021-12-14 16:09:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45794 states, 45792 states have (on average 1.4398584905660377) internal successors, (65934), 45793 states have internal predecessors, (65934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45794 states to 45794 states and 65934 transitions. [2021-12-14 16:09:35,264 INFO L78 Accepts]: Start accepts. Automaton has 45794 states and 65934 transitions. Word has length 112 [2021-12-14 16:09:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:35,264 INFO L470 AbstractCegarLoop]: Abstraction has 45794 states and 65934 transitions. [2021-12-14 16:09:35,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 45794 states and 65934 transitions. [2021-12-14 16:09:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:09:35,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:35,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:35,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:09:35,276 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:35,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash 890525825, now seen corresponding path program 1 times [2021-12-14 16:09:35,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:35,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638358874] [2021-12-14 16:09:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:35,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-14 16:09:35,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:35,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638358874] [2021-12-14 16:09:35,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638358874] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:35,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:35,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:09:35,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203233660] [2021-12-14 16:09:35,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:35,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:09:35,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:35,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:09:35,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:09:35,361 INFO L87 Difference]: Start difference. First operand 45794 states and 65934 transitions. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:39,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:39,313 INFO L93 Difference]: Finished difference Result 90832 states and 131061 transitions. [2021-12-14 16:09:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:09:39,314 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:09:39,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:39,429 INFO L225 Difference]: With dead ends: 90832 [2021-12-14 16:09:39,429 INFO L226 Difference]: Without dead ends: 82926 [2021-12-14 16:09:39,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:09:39,452 INFO L933 BasicCegarLoop]: 1666 mSDtfsCounter, 8582 mSDsluCounter, 2245 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8582 SdHoareTripleChecker+Valid, 3911 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:39,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8582 Valid, 3911 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:09:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82926 states. [2021-12-14 16:09:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82926 to 53698. [2021-12-14 16:09:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53698 states, 53696 states have (on average 1.4388781287246721) internal successors, (77262), 53697 states have internal predecessors, (77262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:42,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53698 states to 53698 states and 77262 transitions. [2021-12-14 16:09:42,516 INFO L78 Accepts]: Start accepts. Automaton has 53698 states and 77262 transitions. Word has length 112 [2021-12-14 16:09:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:42,516 INFO L470 AbstractCegarLoop]: Abstraction has 53698 states and 77262 transitions. [2021-12-14 16:09:42,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 53698 states and 77262 transitions. [2021-12-14 16:09:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-14 16:09:42,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:42,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:42,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:09:42,529 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:42,529 INFO L85 PathProgramCache]: Analyzing trace with hash -420877289, now seen corresponding path program 1 times [2021-12-14 16:09:42,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:42,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575821833] [2021-12-14 16:09:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:42,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-14 16:09:42,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:42,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575821833] [2021-12-14 16:09:42,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575821833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:42,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:42,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 16:09:42,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300412739] [2021-12-14 16:09:42,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:42,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 16:09:42,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:42,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 16:09:42,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-14 16:09:42,728 INFO L87 Difference]: Start difference. First operand 53698 states and 77262 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:47,114 INFO L93 Difference]: Finished difference Result 93936 states and 135541 transitions. [2021-12-14 16:09:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 16:09:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-12-14 16:09:47,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:47,250 INFO L225 Difference]: With dead ends: 93936 [2021-12-14 16:09:47,250 INFO L226 Difference]: Without dead ends: 88430 [2021-12-14 16:09:47,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-14 16:09:47,277 INFO L933 BasicCegarLoop]: 1663 mSDtfsCounter, 8581 mSDsluCounter, 2153 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8581 SdHoareTripleChecker+Valid, 3816 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:47,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8581 Valid, 3816 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:09:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88430 states. [2021-12-14 16:09:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88430 to 59202. [2021-12-14 16:09:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59202 states, 59200 states have (on average 1.4391554054054054) internal successors, (85198), 59201 states have internal predecessors, (85198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59202 states to 59202 states and 85198 transitions. [2021-12-14 16:09:50,858 INFO L78 Accepts]: Start accepts. Automaton has 59202 states and 85198 transitions. Word has length 112 [2021-12-14 16:09:50,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:09:50,858 INFO L470 AbstractCegarLoop]: Abstraction has 59202 states and 85198 transitions. [2021-12-14 16:09:50,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:50,859 INFO L276 IsEmpty]: Start isEmpty. Operand 59202 states and 85198 transitions. [2021-12-14 16:09:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-14 16:09:50,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:09:50,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:09:50,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:09:50,870 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:09:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:09:50,871 INFO L85 PathProgramCache]: Analyzing trace with hash 746098925, now seen corresponding path program 1 times [2021-12-14 16:09:50,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:09:50,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554625523] [2021-12-14 16:09:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:09:50,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:09:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:09:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:09:50,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:09:50,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554625523] [2021-12-14 16:09:50,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554625523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:09:50,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:09:50,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:09:50,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467044416] [2021-12-14 16:09:50,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:09:50,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:09:50,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:09:50,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:09:50,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:50,914 INFO L87 Difference]: Start difference. First operand 59202 states and 85198 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:09:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:09:54,188 INFO L93 Difference]: Finished difference Result 116102 states and 166784 transitions. [2021-12-14 16:09:54,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:09:54,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-14 16:09:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:09:54,282 INFO L225 Difference]: With dead ends: 116102 [2021-12-14 16:09:54,282 INFO L226 Difference]: Without dead ends: 59204 [2021-12-14 16:09:54,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:09:54,324 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 60 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 3192 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:09:54,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 3192 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:09:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59204 states.