./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.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.8.ufo.UNBOUNDED.pals+Problem12_label00.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 5f06498eb80e802eba7f35e8b89bda4b42e6ab2a6a5c4854a4d889d75d8cafdd --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 16:14:26,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 16:14:26,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 16:14:26,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 16:14:26,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 16:14:26,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 16:14:26,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 16:14:26,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 16:14:26,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 16:14:26,412 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 16:14:26,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 16:14:26,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 16:14:26,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 16:14:26,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 16:14:26,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 16:14:26,422 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 16:14:26,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 16:14:26,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 16:14:26,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 16:14:26,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 16:14:26,432 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 16:14:26,433 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 16:14:26,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 16:14:26,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 16:14:26,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 16:14:26,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 16:14:26,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 16:14:26,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 16:14:26,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 16:14:26,445 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 16:14:26,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 16:14:26,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 16:14:26,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 16:14:26,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 16:14:26,450 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 16:14:26,450 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 16:14:26,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 16:14:26,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 16:14:26,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 16:14:26,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 16:14:26,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 16:14:26,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 16:14:26,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 16:14:26,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 16:14:26,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 16:14:26,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 16:14:26,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 16:14:26,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 16:14:26,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 16:14:26,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 16:14:26,488 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 16:14:26,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 16:14:26,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 16:14:26,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 16:14:26,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 16:14:26,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 16:14:26,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 16:14:26,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 16:14:26,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 16:14:26,491 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 16:14:26,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 16:14:26,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 16:14:26,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 16:14:26,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 16:14:26,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 16:14:26,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 16:14:26,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:14:26,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 16:14:26,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 16:14:26,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 16:14:26,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 16:14:26,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 16:14:26,493 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 16:14:26,493 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 16:14:26,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 16:14:26,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 16:14:26,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f06498eb80e802eba7f35e8b89bda4b42e6ab2a6a5c4854a4d889d75d8cafdd [2021-12-14 16:14:26,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 16:14:26,782 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 16:14:26,784 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 16:14:26,785 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 16:14:26,786 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 16:14:26,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-14 16:14:26,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fac0600ed/d917401e96c243b18dc3871583984a2e/FLAG57484972b [2021-12-14 16:14:27,521 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 16:14:27,522 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-14 16:14:27,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fac0600ed/d917401e96c243b18dc3871583984a2e/FLAG57484972b [2021-12-14 16:14:27,669 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fac0600ed/d917401e96c243b18dc3871583984a2e [2021-12-14 16:14:27,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 16:14:27,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 16:14:27,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 16:14:27,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 16:14:27,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 16:14:27,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:14:27" (1/1) ... [2021-12-14 16:14:27,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b3ee50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:27, skipping insertion in model container [2021-12-14 16:14:27,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 04:14:27" (1/1) ... [2021-12-14 16:14:27,684 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 16:14:27,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 16:14:28,158 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.8.ufo.UNBOUNDED.pals+Problem12_label00.c[26888,26901] [2021-12-14 16:14:28,179 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.8.ufo.UNBOUNDED.pals+Problem12_label00.c[28763,28776] [2021-12-14 16:14:28,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:14:28,807 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 16:14:28,856 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.8.ufo.UNBOUNDED.pals+Problem12_label00.c[26888,26901] [2021-12-14 16:14:28,858 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.8.ufo.UNBOUNDED.pals+Problem12_label00.c[28763,28776] [2021-12-14 16:14:29,265 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 16:14:29,291 INFO L208 MainTranslator]: Completed translation [2021-12-14 16:14:29,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29 WrapperNode [2021-12-14 16:14:29,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 16:14:29,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 16:14:29,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 16:14:29,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 16:14:29,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (1/1) ... [2021-12-14 16:14:29,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (1/1) ... [2021-12-14 16:14:29,643 INFO L137 Inliner]: procedures = 40, calls = 25, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 5279 [2021-12-14 16:14:29,643 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 16:14:29,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 16:14:29,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 16:14:29,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 16:14:29,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (1/1) ... [2021-12-14 16:14:29,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (1/1) ... [2021-12-14 16:14:29,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (1/1) ... [2021-12-14 16:14:29,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (1/1) ... [2021-12-14 16:14:30,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (1/1) ... [2021-12-14 16:14:30,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (1/1) ... [2021-12-14 16:14:30,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (1/1) ... [2021-12-14 16:14:30,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 16:14:30,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 16:14:30,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 16:14:30,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 16:14:30,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (1/1) ... [2021-12-14 16:14:30,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 16:14:30,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 16:14:30,292 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 16:14:30,307 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 16:14:30,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 16:14:30,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 16:14:30,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 16:14:30,338 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 16:14:30,483 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 16:14:30,484 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 16:14:34,008 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 16:14:34,036 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 16:14:34,037 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 16:14:34,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:14:34 BoogieIcfgContainer [2021-12-14 16:14:34,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 16:14:34,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 16:14:34,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 16:14:34,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 16:14:34,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 04:14:27" (1/3) ... [2021-12-14 16:14:34,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2853c984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:14:34, skipping insertion in model container [2021-12-14 16:14:34,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 04:14:29" (2/3) ... [2021-12-14 16:14:34,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2853c984 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 04:14:34, skipping insertion in model container [2021-12-14 16:14:34,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 04:14:34" (3/3) ... [2021-12-14 16:14:34,051 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-14 16:14:34,055 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 16:14:34,056 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 16:14:34,159 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 16:14:34,167 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 16:14:34,167 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 16:14:34,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 965 states, 962 states have (on average 1.8960498960498962) internal successors, (1824), 964 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states 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 16:14:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 16:14:34,216 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:34,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 16:14:34,217 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:34,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:34,222 INFO L85 PathProgramCache]: Analyzing trace with hash -34194955, now seen corresponding path program 1 times [2021-12-14 16:14:34,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:34,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599358136] [2021-12-14 16:14:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:34,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:34,414 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 16:14:34,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599358136] [2021-12-14 16:14:34,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599358136] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:34,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:34,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:14:34,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093678118] [2021-12-14 16:14:34,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:34,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:34,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:34,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:34,447 INFO L87 Difference]: Start difference. First operand has 965 states, 962 states have (on average 1.8960498960498962) internal successors, (1824), 964 states have internal predecessors, (1824), 0 states have call successors, (0), 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 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 16:14:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:37,812 INFO L93 Difference]: Finished difference Result 2616 states and 5018 transitions. [2021-12-14 16:14:37,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:37,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-14 16:14:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:37,834 INFO L225 Difference]: With dead ends: 2616 [2021-12-14 16:14:37,835 INFO L226 Difference]: Without dead ends: 1650 [2021-12-14 16:14:37,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:14:37,845 INFO L933 BasicCegarLoop]: 724 mSDtfsCounter, 1071 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-14 16:14:37,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 735 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-14 16:14:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-12-14 16:14:37,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2021-12-14 16:14:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1648 states have (on average 1.6492718446601942) internal successors, (2718), 1649 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states 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 16:14:37,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2718 transitions. [2021-12-14 16:14:37,953 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2718 transitions. Word has length 16 [2021-12-14 16:14:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:37,954 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 2718 transitions. [2021-12-14 16:14:37,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states 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 16:14:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2718 transitions. [2021-12-14 16:14:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 16:14:37,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:37,957 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] [2021-12-14 16:14:37,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 16:14:37,958 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:37,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:37,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2021-12-14 16:14:37,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:37,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634847680] [2021-12-14 16:14:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:37,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:38,160 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 16:14:38,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:38,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634847680] [2021-12-14 16:14:38,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634847680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:38,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:38,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:14:38,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318193821] [2021-12-14 16:14:38,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:38,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:14:38,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:38,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:14:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:14:38,203 INFO L87 Difference]: Start difference. First operand 1650 states and 2718 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:38,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:38,301 INFO L93 Difference]: Finished difference Result 1732 states and 2846 transitions. [2021-12-14 16:14:38,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 16:14:38,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-14 16:14:38,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:38,308 INFO L225 Difference]: With dead ends: 1732 [2021-12-14 16:14:38,308 INFO L226 Difference]: Without dead ends: 1650 [2021-12-14 16:14:38,309 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 16:14:38,311 INFO L933 BasicCegarLoop]: 1689 mSDtfsCounter, 3 mSDsluCounter, 5003 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6692 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:14:38,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6692 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:14:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-12-14 16:14:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2021-12-14 16:14:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1648 states have (on average 1.612257281553398) internal successors, (2657), 1649 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states 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 16:14:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2657 transitions. [2021-12-14 16:14:38,347 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2657 transitions. Word has length 46 [2021-12-14 16:14:38,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:38,348 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 2657 transitions. [2021-12-14 16:14:38,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:38,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2657 transitions. [2021-12-14 16:14:38,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-14 16:14:38,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:38,351 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:14:38,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 16:14:38,352 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:38,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1258624732, now seen corresponding path program 1 times [2021-12-14 16:14:38,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:38,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145740125] [2021-12-14 16:14:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:38,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:14:38,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:38,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145740125] [2021-12-14 16:14:38,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145740125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:38,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:38,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:14:38,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578012874] [2021-12-14 16:14:38,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:38,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:38,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:38,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:38,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:38,432 INFO L87 Difference]: Start difference. First operand 1650 states and 2657 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:41,474 INFO L93 Difference]: Finished difference Result 4656 states and 7584 transitions. [2021-12-14 16:14:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:41,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-14 16:14:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:41,487 INFO L225 Difference]: With dead ends: 4656 [2021-12-14 16:14:41,488 INFO L226 Difference]: Without dead ends: 3152 [2021-12-14 16:14:41,490 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 16:14:41,491 INFO L933 BasicCegarLoop]: 1340 mSDtfsCounter, 753 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-14 16:14:41,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1539 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-14 16:14:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-12-14 16:14:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 3152. [2021-12-14 16:14:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3150 states have (on average 1.527936507936508) internal successors, (4813), 3151 states have internal predecessors, (4813), 0 states have call successors, (0), 0 states 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 16:14:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 4813 transitions. [2021-12-14 16:14:41,550 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 4813 transitions. Word has length 87 [2021-12-14 16:14:41,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:41,551 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 4813 transitions. [2021-12-14 16:14:41,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 4813 transitions. [2021-12-14 16:14:41,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-14 16:14:41,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:41,553 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-14 16:14:41,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 16:14:41,554 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:41,555 INFO L85 PathProgramCache]: Analyzing trace with hash 368682225, now seen corresponding path program 1 times [2021-12-14 16:14:41,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:41,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503430220] [2021-12-14 16:14:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:41,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:14:41,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:41,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503430220] [2021-12-14 16:14:41,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503430220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:41,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:41,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:14:41,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217193117] [2021-12-14 16:14:41,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:41,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:41,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:41,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:41,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:41,695 INFO L87 Difference]: Start difference. First operand 3152 states and 4813 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:44,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:44,539 INFO L93 Difference]: Finished difference Result 9164 states and 14053 transitions. [2021-12-14 16:14:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:44,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-12-14 16:14:44,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:44,566 INFO L225 Difference]: With dead ends: 9164 [2021-12-14 16:14:44,567 INFO L226 Difference]: Without dead ends: 6158 [2021-12-14 16:14:44,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:14:44,585 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 917 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-14 16:14:44,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 691 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-14 16:14:44,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6158 states. [2021-12-14 16:14:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6158 to 6156. [2021-12-14 16:14:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6156 states, 6154 states have (on average 1.3639909002274944) internal successors, (8394), 6155 states have internal predecessors, (8394), 0 states have call successors, (0), 0 states 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 16:14:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6156 states to 6156 states and 8394 transitions. [2021-12-14 16:14:44,722 INFO L78 Accepts]: Start accepts. Automaton has 6156 states and 8394 transitions. Word has length 90 [2021-12-14 16:14:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:44,724 INFO L470 AbstractCegarLoop]: Abstraction has 6156 states and 8394 transitions. [2021-12-14 16:14:44,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:44,724 INFO L276 IsEmpty]: Start isEmpty. Operand 6156 states and 8394 transitions. [2021-12-14 16:14:44,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-14 16:14:44,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:44,727 INFO L514 BasicCegarLoop]: trace histogram [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 16:14:44,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 16:14:44,728 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:44,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1647713710, now seen corresponding path program 1 times [2021-12-14 16:14:44,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:44,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880973381] [2021-12-14 16:14:44,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:44,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:44,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:14:44,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:44,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880973381] [2021-12-14 16:14:44,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880973381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:44,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:44,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:14:44,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007752475] [2021-12-14 16:14:44,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:44,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:44,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:44,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:44,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:44,860 INFO L87 Difference]: Start difference. First operand 6156 states and 8394 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:47,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:47,632 INFO L93 Difference]: Finished difference Result 18176 states and 24796 transitions. [2021-12-14 16:14:47,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:47,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-12-14 16:14:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:47,688 INFO L225 Difference]: With dead ends: 18176 [2021-12-14 16:14:47,689 INFO L226 Difference]: Without dead ends: 12166 [2021-12-14 16:14:47,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:14:47,704 INFO L933 BasicCegarLoop]: 779 mSDtfsCounter, 1106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:14:47,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 786 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-14 16:14:47,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12166 states. [2021-12-14 16:14:47,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12166 to 12164. [2021-12-14 16:14:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12164 states, 12162 states have (on average 1.2800526229238611) internal successors, (15568), 12163 states have internal predecessors, (15568), 0 states have call successors, (0), 0 states 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 16:14:47,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12164 states to 12164 states and 15568 transitions. [2021-12-14 16:14:47,966 INFO L78 Accepts]: Start accepts. Automaton has 12164 states and 15568 transitions. Word has length 91 [2021-12-14 16:14:47,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:47,969 INFO L470 AbstractCegarLoop]: Abstraction has 12164 states and 15568 transitions. [2021-12-14 16:14:47,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 12164 states and 15568 transitions. [2021-12-14 16:14:47,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 16:14:47,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:47,974 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, 1, 1, 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 16:14:47,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 16:14:47,974 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2021-12-14 16:14:47,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:47,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776981650] [2021-12-14 16:14:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:47,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:48,064 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 16:14:48,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:48,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776981650] [2021-12-14 16:14:48,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776981650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:48,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:48,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:14:48,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549953864] [2021-12-14 16:14:48,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:48,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:48,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:48,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:48,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:48,067 INFO L87 Difference]: Start difference. First operand 12164 states and 15568 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:48,120 INFO L93 Difference]: Finished difference Result 12314 states and 15806 transitions. [2021-12-14 16:14:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:48,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 106 [2021-12-14 16:14:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:48,166 INFO L225 Difference]: With dead ends: 12314 [2021-12-14 16:14:48,167 INFO L226 Difference]: Without dead ends: 12236 [2021-12-14 16:14:48,172 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 16:14:48,174 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 1549 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1850 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 16:14:48,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1850 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:14:48,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12236 states. [2021-12-14 16:14:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12236 to 12234. [2021-12-14 16:14:48,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12234 states, 12232 states have (on average 1.2818835840418574) internal successors, (15680), 12233 states have internal predecessors, (15680), 0 states have call successors, (0), 0 states 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 16:14:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12234 states to 12234 states and 15680 transitions. [2021-12-14 16:14:48,435 INFO L78 Accepts]: Start accepts. Automaton has 12234 states and 15680 transitions. Word has length 106 [2021-12-14 16:14:48,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:48,435 INFO L470 AbstractCegarLoop]: Abstraction has 12234 states and 15680 transitions. [2021-12-14 16:14:48,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 12234 states and 15680 transitions. [2021-12-14 16:14:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 16:14:48,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:48,439 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, 1, 1, 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 16:14:48,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 16:14:48,439 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:48,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:48,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2021-12-14 16:14:48,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:48,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544849210] [2021-12-14 16:14:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:48,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:48,515 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 16:14:48,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:48,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544849210] [2021-12-14 16:14:48,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544849210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:48,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:48,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:14:48,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864943039] [2021-12-14 16:14:48,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:48,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:48,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:48,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:48,518 INFO L87 Difference]: Start difference. First operand 12234 states and 15680 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:48,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:48,574 INFO L93 Difference]: Finished difference Result 12518 states and 16132 transitions. [2021-12-14 16:14:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:48,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 106 [2021-12-14 16:14:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:48,598 INFO L225 Difference]: With dead ends: 12518 [2021-12-14 16:14:48,598 INFO L226 Difference]: Without dead ends: 12370 [2021-12-14 16:14:48,603 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 16:14:48,605 INFO L933 BasicCegarLoop]: 1719 mSDtfsCounter, 1545 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 1849 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 16:14:48,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1545 Valid, 1849 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:14:48,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12370 states. [2021-12-14 16:14:48,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12370 to 12368. [2021-12-14 16:14:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12368 states, 12366 states have (on average 1.2852175319424228) internal successors, (15893), 12367 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states 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 16:14:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12368 states to 12368 states and 15893 transitions. [2021-12-14 16:14:48,782 INFO L78 Accepts]: Start accepts. Automaton has 12368 states and 15893 transitions. Word has length 106 [2021-12-14 16:14:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:48,783 INFO L470 AbstractCegarLoop]: Abstraction has 12368 states and 15893 transitions. [2021-12-14 16:14:48,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:48,783 INFO L276 IsEmpty]: Start isEmpty. Operand 12368 states and 15893 transitions. [2021-12-14 16:14:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 16:14:48,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:48,784 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, 1, 1, 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 16:14:48,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 16:14:48,785 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2021-12-14 16:14:48,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:48,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436773536] [2021-12-14 16:14:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:48,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:48,842 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 16:14:48,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:48,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436773536] [2021-12-14 16:14:48,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436773536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:48,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:48,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:14:48,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409132671] [2021-12-14 16:14:48,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:48,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:48,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:48,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:48,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:48,845 INFO L87 Difference]: Start difference. First operand 12368 states and 15893 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:48,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:48,901 INFO L93 Difference]: Finished difference Result 12908 states and 16751 transitions. [2021-12-14 16:14:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:48,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 106 [2021-12-14 16:14:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:48,924 INFO L225 Difference]: With dead ends: 12908 [2021-12-14 16:14:48,924 INFO L226 Difference]: Without dead ends: 12626 [2021-12-14 16:14:48,931 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 16:14:48,932 INFO L933 BasicCegarLoop]: 1714 mSDtfsCounter, 1541 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 1848 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 16:14:48,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 1848 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:14:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12626 states. [2021-12-14 16:14:49,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12626 to 12624. [2021-12-14 16:14:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12624 states, 12622 states have (on average 1.2911582950404057) internal successors, (16297), 12623 states have internal predecessors, (16297), 0 states have call successors, (0), 0 states 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 16:14:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12624 states to 12624 states and 16297 transitions. [2021-12-14 16:14:49,106 INFO L78 Accepts]: Start accepts. Automaton has 12624 states and 16297 transitions. Word has length 106 [2021-12-14 16:14:49,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:49,106 INFO L470 AbstractCegarLoop]: Abstraction has 12624 states and 16297 transitions. [2021-12-14 16:14:49,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 12624 states and 16297 transitions. [2021-12-14 16:14:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 16:14:49,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:49,110 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, 1, 1, 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 16:14:49,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 16:14:49,110 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:49,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2021-12-14 16:14:49,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:49,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977680909] [2021-12-14 16:14:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:49,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:49,171 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 16:14:49,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:49,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977680909] [2021-12-14 16:14:49,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977680909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:49,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:49,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:14:49,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348177552] [2021-12-14 16:14:49,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:49,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:49,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:49,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:49,175 INFO L87 Difference]: Start difference. First operand 12624 states and 16297 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:49,247 INFO L93 Difference]: Finished difference Result 13652 states and 17923 transitions. [2021-12-14 16:14:49,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:49,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 106 [2021-12-14 16:14:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:49,274 INFO L225 Difference]: With dead ends: 13652 [2021-12-14 16:14:49,275 INFO L226 Difference]: Without dead ends: 13114 [2021-12-14 16:14:49,281 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 16:14:49,284 INFO L933 BasicCegarLoop]: 1709 mSDtfsCounter, 1537 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1847 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 16:14:49,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1847 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:14:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2021-12-14 16:14:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 13112. [2021-12-14 16:14:49,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13112 states, 13110 states have (on average 1.3013729977116706) internal successors, (17061), 13111 states have internal predecessors, (17061), 0 states have call successors, (0), 0 states 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 16:14:49,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13112 states to 13112 states and 17061 transitions. [2021-12-14 16:14:49,456 INFO L78 Accepts]: Start accepts. Automaton has 13112 states and 17061 transitions. Word has length 106 [2021-12-14 16:14:49,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:49,457 INFO L470 AbstractCegarLoop]: Abstraction has 13112 states and 17061 transitions. [2021-12-14 16:14:49,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:49,457 INFO L276 IsEmpty]: Start isEmpty. Operand 13112 states and 17061 transitions. [2021-12-14 16:14:49,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 16:14:49,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:49,458 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, 1, 1, 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 16:14:49,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 16:14:49,462 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:49,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:49,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2021-12-14 16:14:49,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:49,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604918747] [2021-12-14 16:14:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:49,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:49,519 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 16:14:49,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:49,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604918747] [2021-12-14 16:14:49,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604918747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:49,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:49,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:14:49,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524634598] [2021-12-14 16:14:49,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:49,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:49,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:49,522 INFO L87 Difference]: Start difference. First operand 13112 states and 17061 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:49,664 INFO L93 Difference]: Finished difference Result 15068 states and 20135 transitions. [2021-12-14 16:14:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:49,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 106 [2021-12-14 16:14:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:49,692 INFO L225 Difference]: With dead ends: 15068 [2021-12-14 16:14:49,692 INFO L226 Difference]: Without dead ends: 14042 [2021-12-14 16:14:49,698 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 16:14:49,699 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 1533 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 1846 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 16:14:49,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 1846 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:14:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14042 states. [2021-12-14 16:14:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14042 to 14040. [2021-12-14 16:14:49,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14040 states, 14038 states have (on average 1.3179227810229377) internal successors, (18501), 14039 states have internal predecessors, (18501), 0 states have call successors, (0), 0 states 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 16:14:49,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14040 states to 14040 states and 18501 transitions. [2021-12-14 16:14:49,900 INFO L78 Accepts]: Start accepts. Automaton has 14040 states and 18501 transitions. Word has length 106 [2021-12-14 16:14:49,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:49,900 INFO L470 AbstractCegarLoop]: Abstraction has 14040 states and 18501 transitions. [2021-12-14 16:14:49,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 14040 states and 18501 transitions. [2021-12-14 16:14:49,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 16:14:49,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:49,902 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, 1, 1, 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 16:14:49,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 16:14:49,903 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:49,903 INFO L85 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2021-12-14 16:14:49,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:49,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186581816] [2021-12-14 16:14:49,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:49,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:49,963 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 16:14:49,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:49,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186581816] [2021-12-14 16:14:49,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186581816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:49,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:49,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:14:49,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606887345] [2021-12-14 16:14:49,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:49,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:49,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:49,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:49,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:49,966 INFO L87 Difference]: Start difference. First operand 14040 states and 18501 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:50,083 INFO L93 Difference]: Finished difference Result 17756 states and 24295 transitions. [2021-12-14 16:14:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 106 [2021-12-14 16:14:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:50,115 INFO L225 Difference]: With dead ends: 17756 [2021-12-14 16:14:50,116 INFO L226 Difference]: Without dead ends: 15802 [2021-12-14 16:14:50,125 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 16:14:50,125 INFO L933 BasicCegarLoop]: 1699 mSDtfsCounter, 1529 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1845 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 16:14:50,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 1845 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:14:50,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15802 states. [2021-12-14 16:14:50,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15802 to 15800. [2021-12-14 16:14:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15800 states, 15798 states have (on average 1.342258513735916) internal successors, (21205), 15799 states have internal predecessors, (21205), 0 states have call successors, (0), 0 states 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 16:14:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15800 states to 15800 states and 21205 transitions. [2021-12-14 16:14:50,360 INFO L78 Accepts]: Start accepts. Automaton has 15800 states and 21205 transitions. Word has length 106 [2021-12-14 16:14:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:50,361 INFO L470 AbstractCegarLoop]: Abstraction has 15800 states and 21205 transitions. [2021-12-14 16:14:50,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:50,362 INFO L276 IsEmpty]: Start isEmpty. Operand 15800 states and 21205 transitions. [2021-12-14 16:14:50,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 16:14:50,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:50,363 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, 1, 1, 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 16:14:50,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 16:14:50,363 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2021-12-14 16:14:50,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:50,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960363980] [2021-12-14 16:14:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:50,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:50,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:50,422 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 16:14:50,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:50,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960363980] [2021-12-14 16:14:50,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960363980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:50,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:50,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:14:50,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665181299] [2021-12-14 16:14:50,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:50,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:50,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:50,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:50,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:50,426 INFO L87 Difference]: Start difference. First operand 15800 states and 21205 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:50,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:50,584 INFO L93 Difference]: Finished difference Result 22844 states and 32087 transitions. [2021-12-14 16:14:50,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:50,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 106 [2021-12-14 16:14:50,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:50,617 INFO L225 Difference]: With dead ends: 22844 [2021-12-14 16:14:50,618 INFO L226 Difference]: Without dead ends: 19130 [2021-12-14 16:14:50,632 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 16:14:50,632 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1525 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1844 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 16:14:50,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1525 Valid, 1844 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:14:50,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19130 states. [2021-12-14 16:14:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19130 to 19128. [2021-12-14 16:14:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19128 states, 19126 states have (on average 1.3730523894175468) internal successors, (26261), 19127 states have internal predecessors, (26261), 0 states have call successors, (0), 0 states 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 16:14:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19128 states to 19128 states and 26261 transitions. [2021-12-14 16:14:51,046 INFO L78 Accepts]: Start accepts. Automaton has 19128 states and 26261 transitions. Word has length 106 [2021-12-14 16:14:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:51,047 INFO L470 AbstractCegarLoop]: Abstraction has 19128 states and 26261 transitions. [2021-12-14 16:14:51,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 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 16:14:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 19128 states and 26261 transitions. [2021-12-14 16:14:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-14 16:14:51,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:51,049 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, 1, 1, 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 16:14:51,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 16:14:51,049 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:51,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:51,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2021-12-14 16:14:51,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:51,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425942133] [2021-12-14 16:14:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:51,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:51,161 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 16:14:51,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425942133] [2021-12-14 16:14:51,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425942133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:51,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:51,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:14:51,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401523640] [2021-12-14 16:14:51,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:51,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:14:51,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:51,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:14:51,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:14:51,164 INFO L87 Difference]: Start difference. First operand 19128 states and 26261 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 16:14:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:53,506 INFO L93 Difference]: Finished difference Result 131800 states and 199333 transitions. [2021-12-14 16:14:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 16:14:53,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 106 [2021-12-14 16:14:53,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:53,777 INFO L225 Difference]: With dead ends: 131800 [2021-12-14 16:14:53,778 INFO L226 Difference]: Without dead ends: 124758 [2021-12-14 16:14:53,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-12-14 16:14:53,827 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 15488 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15488 SdHoareTripleChecker+Valid, 4869 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:14:53,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15488 Valid, 4869 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:14:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124758 states. [2021-12-14 16:14:55,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124758 to 26168. [2021-12-14 16:14:55,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26168 states, 26166 states have (on average 1.407207826951005) internal successors, (36821), 26167 states have internal predecessors, (36821), 0 states have call successors, (0), 0 states 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 16:14:55,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26168 states to 26168 states and 36821 transitions. [2021-12-14 16:14:55,447 INFO L78 Accepts]: Start accepts. Automaton has 26168 states and 36821 transitions. Word has length 106 [2021-12-14 16:14:55,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:55,448 INFO L470 AbstractCegarLoop]: Abstraction has 26168 states and 36821 transitions. [2021-12-14 16:14:55,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 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 16:14:55,448 INFO L276 IsEmpty]: Start isEmpty. Operand 26168 states and 36821 transitions. [2021-12-14 16:14:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-14 16:14:55,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:55,450 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, 1, 1, 1, 1, 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 16:14:55,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 16:14:55,450 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:55,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:55,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2021-12-14 16:14:55,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:55,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221424744] [2021-12-14 16:14:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:55,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:55,508 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 16:14:55,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:55,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221424744] [2021-12-14 16:14:55,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221424744] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:55,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:55,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:14:55,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502994423] [2021-12-14 16:14:55,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:55,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:14:55,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:55,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:14:55,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:14:55,511 INFO L87 Difference]: Start difference. First operand 26168 states and 36821 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:56,419 INFO L93 Difference]: Finished difference Result 52924 states and 77143 transitions. [2021-12-14 16:14:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:14:56,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-14 16:14:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:56,483 INFO L225 Difference]: With dead ends: 52924 [2021-12-14 16:14:56,484 INFO L226 Difference]: Without dead ends: 38842 [2021-12-14 16:14:56,510 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 16:14:56,511 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 1516 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:14:56,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:14:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38842 states. [2021-12-14 16:14:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38842 to 38584. [2021-12-14 16:14:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38584 states, 38582 states have (on average 1.422139857964854) internal successors, (54869), 38583 states have internal predecessors, (54869), 0 states have call successors, (0), 0 states 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 16:14:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 54869 transitions. [2021-12-14 16:14:57,734 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 54869 transitions. Word has length 108 [2021-12-14 16:14:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:14:57,735 INFO L470 AbstractCegarLoop]: Abstraction has 38584 states and 54869 transitions. [2021-12-14 16:14:57,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 54869 transitions. [2021-12-14 16:14:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-14 16:14:57,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:14:57,737 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, 1, 1, 1, 1, 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 16:14:57,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-14 16:14:57,737 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:14:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:14:57,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2021-12-14 16:14:57,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:14:57,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850375255] [2021-12-14 16:14:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:14:57,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:14:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:14:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:14:58,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:14:58,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850375255] [2021-12-14 16:14:58,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850375255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:14:58,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:14:58,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:14:58,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434947002] [2021-12-14 16:14:58,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:14:58,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:14:58,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:14:58,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:14:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:14:58,030 INFO L87 Difference]: Start difference. First operand 38584 states and 54869 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:14:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:14:59,414 INFO L93 Difference]: Finished difference Result 65084 states and 94295 transitions. [2021-12-14 16:14:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 16:14:59,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-12-14 16:14:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:14:59,472 INFO L225 Difference]: With dead ends: 65084 [2021-12-14 16:14:59,472 INFO L226 Difference]: Without dead ends: 38586 [2021-12-14 16:14:59,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-14 16:14:59,502 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 9676 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9676 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:14:59,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9676 Valid, 2473 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:14:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38586 states. [2021-12-14 16:15:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38586 to 38584. [2021-12-14 16:15:00,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38584 states, 38582 states have (on average 1.4155046394691826) internal successors, (54613), 38583 states have internal predecessors, (54613), 0 states have call successors, (0), 0 states 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 16:15:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 54613 transitions. [2021-12-14 16:15:00,579 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 54613 transitions. Word has length 108 [2021-12-14 16:15:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:00,579 INFO L470 AbstractCegarLoop]: Abstraction has 38584 states and 54613 transitions. [2021-12-14 16:15:00,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:15:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 54613 transitions. [2021-12-14 16:15:00,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 16:15:00,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:00,581 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, 1, 1, 1, 1, 1, 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 16:15:00,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-14 16:15:00,581 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:00,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:00,582 INFO L85 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2021-12-14 16:15:00,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:00,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194017579] [2021-12-14 16:15:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:00,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:00,662 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 16:15:00,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:00,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194017579] [2021-12-14 16:15:00,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194017579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:00,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:00,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:15:00,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284674042] [2021-12-14 16:15:00,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:00,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 16:15:00,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:00,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 16:15:00,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 16:15:00,666 INFO L87 Difference]: Start difference. First operand 38584 states and 54613 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:15:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:01,875 INFO L93 Difference]: Finished difference Result 65082 states and 93782 transitions. [2021-12-14 16:15:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 16:15:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-14 16:15:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:01,925 INFO L225 Difference]: With dead ends: 65082 [2021-12-14 16:15:01,925 INFO L226 Difference]: Without dead ends: 38584 [2021-12-14 16:15:01,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 16:15:01,946 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 4752 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4752 SdHoareTripleChecker+Valid, 3123 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:01,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4752 Valid, 3123 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 16:15:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38584 states. [2021-12-14 16:15:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38584 to 38584. [2021-12-14 16:15:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38584 states, 38582 states have (on average 1.4088694209735109) internal successors, (54357), 38583 states have internal predecessors, (54357), 0 states have call successors, (0), 0 states 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 16:15:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 54357 transitions. [2021-12-14 16:15:03,251 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 54357 transitions. Word has length 109 [2021-12-14 16:15:03,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:03,252 INFO L470 AbstractCegarLoop]: Abstraction has 38584 states and 54357 transitions. [2021-12-14 16:15:03,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:15:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 54357 transitions. [2021-12-14 16:15:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-14 16:15:03,253 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:03,253 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, 1, 1, 1, 1, 1, 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 16:15:03,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-14 16:15:03,254 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:03,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:03,254 INFO L85 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2021-12-14 16:15:03,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:03,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569327546] [2021-12-14 16:15:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:03,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:03,335 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 16:15:03,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:03,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569327546] [2021-12-14 16:15:03,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569327546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:03,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:03,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 16:15:03,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840630819] [2021-12-14 16:15:03,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:03,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 16:15:03,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:03,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 16:15:03,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 16:15:03,338 INFO L87 Difference]: Start difference. First operand 38584 states and 54357 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:15:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:05,027 INFO L93 Difference]: Finished difference Result 58210 states and 82826 transitions. [2021-12-14 16:15:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 16:15:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-12-14 16:15:05,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:05,128 INFO L225 Difference]: With dead ends: 58210 [2021-12-14 16:15:05,128 INFO L226 Difference]: Without dead ends: 58208 [2021-12-14 16:15:05,144 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 16:15:05,145 INFO L933 BasicCegarLoop]: 1688 mSDtfsCounter, 339 mSDsluCounter, 4889 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 6577 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:05,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 6577 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:15:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58208 states. [2021-12-14 16:15:06,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58208 to 39352. [2021-12-14 16:15:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39352 states, 39350 states have (on average 1.3976365946632783) internal successors, (54997), 39351 states have internal predecessors, (54997), 0 states have call successors, (0), 0 states 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 16:15:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39352 states to 39352 states and 54997 transitions. [2021-12-14 16:15:06,736 INFO L78 Accepts]: Start accepts. Automaton has 39352 states and 54997 transitions. Word has length 109 [2021-12-14 16:15:06,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:06,736 INFO L470 AbstractCegarLoop]: Abstraction has 39352 states and 54997 transitions. [2021-12-14 16:15:06,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:15:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 39352 states and 54997 transitions. [2021-12-14 16:15:06,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-14 16:15:06,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:06,737 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, 1, 1, 1, 1, 1, 1, 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 16:15:06,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-14 16:15:06,738 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:06,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:06,738 INFO L85 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2021-12-14 16:15:06,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:06,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360921231] [2021-12-14 16:15:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:06,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:06,782 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 16:15:06,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:06,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360921231] [2021-12-14 16:15:06,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360921231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:06,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:06,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 16:15:06,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484307357] [2021-12-14 16:15:06,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:06,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:15:06,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:06,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:15:06,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:15:06,785 INFO L87 Difference]: Start difference. First operand 39352 states and 54997 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 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 16:15:08,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:08,289 INFO L93 Difference]: Finished difference Result 67007 states and 95451 transitions. [2021-12-14 16:15:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:15:08,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 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 110 [2021-12-14 16:15:08,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:08,358 INFO L225 Difference]: With dead ends: 67007 [2021-12-14 16:15:08,359 INFO L226 Difference]: Without dead ends: 52156 [2021-12-14 16:15:08,380 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 16:15:08,381 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 1549 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1852 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 16:15:08,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1852 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 16:15:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52156 states. [2021-12-14 16:15:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52156 to 52154. [2021-12-14 16:15:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52154 states, 52152 states have (on average 1.4055645037582452) internal successors, (73303), 52153 states have internal predecessors, (73303), 0 states have call successors, (0), 0 states 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 16:15:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52154 states to 52154 states and 73303 transitions. [2021-12-14 16:15:10,721 INFO L78 Accepts]: Start accepts. Automaton has 52154 states and 73303 transitions. Word has length 110 [2021-12-14 16:15:10,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:10,721 INFO L470 AbstractCegarLoop]: Abstraction has 52154 states and 73303 transitions. [2021-12-14 16:15:10,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 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 16:15:10,721 INFO L276 IsEmpty]: Start isEmpty. Operand 52154 states and 73303 transitions. [2021-12-14 16:15:10,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-14 16:15:10,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:10,722 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 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 16:15:10,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-14 16:15:10,723 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:10,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:10,723 INFO L85 PathProgramCache]: Analyzing trace with hash -502556093, now seen corresponding path program 1 times [2021-12-14 16:15:10,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:10,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313078856] [2021-12-14 16:15:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:10,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 16:15:10,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:10,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313078856] [2021-12-14 16:15:10,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313078856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:10,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:10,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 16:15:10,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016112844] [2021-12-14 16:15:10,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:10,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 16:15:10,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:10,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 16:15:10,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 16:15:10,785 INFO L87 Difference]: Start difference. First operand 52154 states and 73303 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:15:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 16:15:15,216 INFO L93 Difference]: Finished difference Result 75437 states and 103259 transitions. [2021-12-14 16:15:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 16:15:15,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-14 16:15:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 16:15:15,298 INFO L225 Difference]: With dead ends: 75437 [2021-12-14 16:15:15,299 INFO L226 Difference]: Without dead ends: 63419 [2021-12-14 16:15:15,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 16:15:15,317 INFO L933 BasicCegarLoop]: 632 mSDtfsCounter, 928 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-14 16:15:15,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 638 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-14 16:15:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63419 states. [2021-12-14 16:15:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63419 to 62668. [2021-12-14 16:15:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62668 states, 62666 states have (on average 1.353285673251843) internal successors, (84805), 62667 states have internal predecessors, (84805), 0 states have call successors, (0), 0 states 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 16:15:17,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62668 states to 62668 states and 84805 transitions. [2021-12-14 16:15:17,438 INFO L78 Accepts]: Start accepts. Automaton has 62668 states and 84805 transitions. Word has length 125 [2021-12-14 16:15:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 16:15:17,438 INFO L470 AbstractCegarLoop]: Abstraction has 62668 states and 84805 transitions. [2021-12-14 16:15:17,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 16:15:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 62668 states and 84805 transitions. [2021-12-14 16:15:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-14 16:15:17,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 16:15:17,460 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:15:17,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-14 16:15:17,461 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 16:15:17,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 16:15:17,461 INFO L85 PathProgramCache]: Analyzing trace with hash 635734382, now seen corresponding path program 1 times [2021-12-14 16:15:17,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 16:15:17,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549878909] [2021-12-14 16:15:17,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 16:15:17,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 16:15:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 16:15:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 16:15:17,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 16:15:17,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549878909] [2021-12-14 16:15:17,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549878909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 16:15:17,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 16:15:17,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-14 16:15:17,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696510297] [2021-12-14 16:15:17,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 16:15:17,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-14 16:15:17,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 16:15:17,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-14 16:15:17,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-14 16:15:17,583 INFO L87 Difference]: Start difference. First operand 62668 states and 84805 transitions. Second operand has 10 states, 10 states have (on average 13.8) internal successors, (138), 10 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)