./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.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 d72d7c845292578ad4711d5954bbaa34eac8266f0504ea14ab2c6e0b02bee46d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 15:56:52,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 15:56:52,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 15:56:52,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 15:56:52,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 15:56:52,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 15:56:52,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 15:56:52,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 15:56:52,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 15:56:52,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 15:56:52,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 15:56:52,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 15:56:52,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 15:56:52,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 15:56:52,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 15:56:52,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 15:56:52,424 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 15:56:52,425 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 15:56:52,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 15:56:52,430 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 15:56:52,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 15:56:52,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 15:56:52,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 15:56:52,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 15:56:52,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 15:56:52,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 15:56:52,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 15:56:52,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 15:56:52,446 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 15:56:52,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 15:56:52,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 15:56:52,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 15:56:52,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 15:56:52,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 15:56:52,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 15:56:52,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 15:56:52,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 15:56:52,454 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 15:56:52,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 15:56:52,455 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 15:56:52,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 15:56:52,457 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 15:56:52,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 15:56:52,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 15:56:52,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 15:56:52,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 15:56:52,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 15:56:52,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 15:56:52,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 15:56:52,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 15:56:52,506 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 15:56:52,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 15:56:52,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 15:56:52,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 15:56:52,507 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 15:56:52,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 15:56:52,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 15:56:52,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 15:56:52,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 15:56:52,508 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 15:56:52,508 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 15:56:52,509 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 15:56:52,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 15:56:52,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 15:56:52,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 15:56:52,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 15:56:52,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:56:52,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 15:56:52,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 15:56:52,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 15:56:52,512 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 15:56:52,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 15:56:52,512 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 15:56:52,512 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 15:56:52,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 15:56:52,513 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 15:56:52,513 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d72d7c845292578ad4711d5954bbaa34eac8266f0504ea14ab2c6e0b02bee46d [2021-12-17 15:56:52,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 15:56:52,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 15:56:52,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 15:56:52,767 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 15:56:52,768 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 15:56:52,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c [2021-12-17 15:56:52,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f56d21b85/ed3e299c61ad4f8fbe8021fde042ae01/FLAGb954b596c [2021-12-17 15:56:53,396 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 15:56:53,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c [2021-12-17 15:56:53,434 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f56d21b85/ed3e299c61ad4f8fbe8021fde042ae01/FLAGb954b596c [2021-12-17 15:56:53,698 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f56d21b85/ed3e299c61ad4f8fbe8021fde042ae01 [2021-12-17 15:56:53,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 15:56:53,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 15:56:53,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 15:56:53,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 15:56:53,708 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 15:56:53,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:56:53" (1/1) ... [2021-12-17 15:56:53,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d56f6e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:53, skipping insertion in model container [2021-12-17 15:56:53,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 03:56:53" (1/1) ... [2021-12-17 15:56:53,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 15:56:53,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 15:56:54,014 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/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c[31211,31224] [2021-12-17 15:56:54,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:56:54,030 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 15:56:54,115 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/seq-mthreaded/pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c[31211,31224] [2021-12-17 15:56:54,123 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 15:56:54,139 INFO L208 MainTranslator]: Completed translation [2021-12-17 15:56:54,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54 WrapperNode [2021-12-17 15:56:54,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 15:56:54,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 15:56:54,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 15:56:54,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 15:56:54,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (1/1) ... [2021-12-17 15:56:54,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (1/1) ... [2021-12-17 15:56:54,224 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 1010 [2021-12-17 15:56:54,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 15:56:54,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 15:56:54,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 15:56:54,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 15:56:54,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (1/1) ... [2021-12-17 15:56:54,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (1/1) ... [2021-12-17 15:56:54,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (1/1) ... [2021-12-17 15:56:54,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (1/1) ... [2021-12-17 15:56:54,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (1/1) ... [2021-12-17 15:56:54,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (1/1) ... [2021-12-17 15:56:54,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (1/1) ... [2021-12-17 15:56:54,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 15:56:54,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 15:56:54,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 15:56:54,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 15:56:54,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (1/1) ... [2021-12-17 15:56:54,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 15:56:54,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 15:56:54,341 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 15:56:54,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 15:56:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 15:56:54,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 15:56:54,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 15:56:54,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 15:56:54,545 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 15:56:54,560 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 15:56:55,395 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 15:56:55,405 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 15:56:55,406 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 15:56:55,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:56:55 BoogieIcfgContainer [2021-12-17 15:56:55,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 15:56:55,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 15:56:55,410 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 15:56:55,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 15:56:55,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 03:56:53" (1/3) ... [2021-12-17 15:56:55,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16117d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:56:55, skipping insertion in model container [2021-12-17 15:56:55,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 03:56:54" (2/3) ... [2021-12-17 15:56:55,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16117d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 03:56:55, skipping insertion in model container [2021-12-17 15:56:55,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 03:56:55" (3/3) ... [2021-12-17 15:56:55,416 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.UNBOUNDED.pals.c [2021-12-17 15:56:55,420 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 15:56:55,420 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 15:56:55,461 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 15:56:55,467 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 15:56:55,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 15:56:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 333 states, 331 states have (on average 1.8006042296072509) internal successors, (596), 332 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:55,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 15:56:55,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:55,502 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:55,502 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash 623353910, now seen corresponding path program 1 times [2021-12-17 15:56:55,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:55,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792782106] [2021-12-17 15:56:55,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:55,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:56:55,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:56:55,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:56:55,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792782106] [2021-12-17 15:56:55,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792782106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:56:55,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:56:55,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 15:56:55,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369339557] [2021-12-17 15:56:55,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:56:55,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 15:56:55,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:56:55,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 15:56:55,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 15:56:55,873 INFO L87 Difference]: Start difference. First operand has 333 states, 331 states have (on average 1.8006042296072509) internal successors, (596), 332 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:56:55,942 INFO L93 Difference]: Finished difference Result 467 states and 827 transitions. [2021-12-17 15:56:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 15:56:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-17 15:56:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:56:55,977 INFO L225 Difference]: With dead ends: 467 [2021-12-17 15:56:55,977 INFO L226 Difference]: Without dead ends: 329 [2021-12-17 15:56:55,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 15:56:55,986 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:56:55,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:56:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-17 15:56:56,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2021-12-17 15:56:56,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.795731707317073) internal successors, (589), 328 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 589 transitions. [2021-12-17 15:56:56,059 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 589 transitions. Word has length 77 [2021-12-17 15:56:56,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:56:56,060 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 589 transitions. [2021-12-17 15:56:56,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 589 transitions. [2021-12-17 15:56:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 15:56:56,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:56,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:56,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 15:56:56,071 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:56,074 INFO L85 PathProgramCache]: Analyzing trace with hash 489340404, now seen corresponding path program 1 times [2021-12-17 15:56:56,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:56,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048919897] [2021-12-17 15:56:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:56,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:56:56,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:56:56,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:56:56,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048919897] [2021-12-17 15:56:56,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048919897] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:56:56,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:56:56,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 15:56:56,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503890800] [2021-12-17 15:56:56,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:56:56,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 15:56:56,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:56:56,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 15:56:56,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:56:56,270 INFO L87 Difference]: Start difference. First operand 329 states and 589 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:56:56,377 INFO L93 Difference]: Finished difference Result 466 states and 820 transitions. [2021-12-17 15:56:56,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 15:56:56,378 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-17 15:56:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:56:56,381 INFO L225 Difference]: With dead ends: 466 [2021-12-17 15:56:56,381 INFO L226 Difference]: Without dead ends: 329 [2021-12-17 15:56:56,386 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 [2021-12-17 15:56:56,388 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 3 mSDsluCounter, 1712 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2299 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:56:56,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2299 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:56:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-12-17 15:56:56,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2021-12-17 15:56:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.6554878048780488) internal successors, (543), 328 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 543 transitions. [2021-12-17 15:56:56,405 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 543 transitions. Word has length 77 [2021-12-17 15:56:56,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:56:56,408 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 543 transitions. [2021-12-17 15:56:56,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,408 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 543 transitions. [2021-12-17 15:56:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-17 15:56:56,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:56,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:56,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 15:56:56,414 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:56,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:56,415 INFO L85 PathProgramCache]: Analyzing trace with hash 268932394, now seen corresponding path program 1 times [2021-12-17 15:56:56,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:56,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005525653] [2021-12-17 15:56:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:56,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:56:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:56:56,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:56:56,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005525653] [2021-12-17 15:56:56,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005525653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:56:56,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:56:56,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:56:56,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290478090] [2021-12-17 15:56:56,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:56:56,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:56:56,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:56:56,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:56:56,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:56:56,561 INFO L87 Difference]: Start difference. First operand 329 states and 543 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:56:56,622 INFO L93 Difference]: Finished difference Result 583 states and 975 transitions. [2021-12-17 15:56:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:56:56,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-17 15:56:56,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:56:56,625 INFO L225 Difference]: With dead ends: 583 [2021-12-17 15:56:56,625 INFO L226 Difference]: Without dead ends: 450 [2021-12-17 15:56:56,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:56:56,628 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 196 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:56:56,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1022 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:56:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-17 15:56:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 447. [2021-12-17 15:56:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.6591928251121075) internal successors, (740), 446 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 740 transitions. [2021-12-17 15:56:56,649 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 740 transitions. Word has length 122 [2021-12-17 15:56:56,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:56:56,651 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 740 transitions. [2021-12-17 15:56:56,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,652 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 740 transitions. [2021-12-17 15:56:56,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 15:56:56,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:56,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:56,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 15:56:56,657 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:56,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2041791286, now seen corresponding path program 1 times [2021-12-17 15:56:56,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:56,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488471246] [2021-12-17 15:56:56,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:56,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:56:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:56:56,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:56:56,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488471246] [2021-12-17 15:56:56,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488471246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:56:56,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:56:56,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:56:56,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339630936] [2021-12-17 15:56:56,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:56:56,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:56:56,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:56:56,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:56:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:56:56,796 INFO L87 Difference]: Start difference. First operand 447 states and 740 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:56:56,830 INFO L93 Difference]: Finished difference Result 929 states and 1552 transitions. [2021-12-17 15:56:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:56:56,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-17 15:56:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:56:56,836 INFO L225 Difference]: With dead ends: 929 [2021-12-17 15:56:56,836 INFO L226 Difference]: Without dead ends: 678 [2021-12-17 15:56:56,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:56:56,848 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 197 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:56:56,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 1035 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:56:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-17 15:56:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 674. [2021-12-17 15:56:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 673 states have (on average 1.6656760772659733) internal successors, (1121), 673 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 1121 transitions. [2021-12-17 15:56:56,874 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 1121 transitions. Word has length 125 [2021-12-17 15:56:56,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:56:56,876 INFO L470 AbstractCegarLoop]: Abstraction has 674 states and 1121 transitions. [2021-12-17 15:56:56,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 1121 transitions. [2021-12-17 15:56:56,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-17 15:56:56,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:56,878 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:56,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 15:56:56,879 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:56,879 INFO L85 PathProgramCache]: Analyzing trace with hash 703648971, now seen corresponding path program 1 times [2021-12-17 15:56:56,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:56,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188583254] [2021-12-17 15:56:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:56,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:56:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:56:56,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:56:56,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188583254] [2021-12-17 15:56:56,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188583254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:56:56,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:56:56,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:56:56,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053821455] [2021-12-17 15:56:56,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:56:56,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:56:56,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:56:56,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:56:56,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:56:56,970 INFO L87 Difference]: Start difference. First operand 674 states and 1121 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:56:57,008 INFO L93 Difference]: Finished difference Result 1590 states and 2659 transitions. [2021-12-17 15:56:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:56:57,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-12-17 15:56:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:56:57,014 INFO L225 Difference]: With dead ends: 1590 [2021-12-17 15:56:57,014 INFO L226 Difference]: Without dead ends: 1112 [2021-12-17 15:56:57,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:56:57,016 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 190 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:56:57,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 1036 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:56:57,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-12-17 15:56:57,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1106. [2021-12-17 15:56:57,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1105 states have (on average 1.6660633484162897) internal successors, (1841), 1105 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1841 transitions. [2021-12-17 15:56:57,044 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1841 transitions. Word has length 128 [2021-12-17 15:56:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:56:57,045 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1841 transitions. [2021-12-17 15:56:57,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:57,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1841 transitions. [2021-12-17 15:56:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 15:56:57,050 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:57,051 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:57,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 15:56:57,051 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1474863799, now seen corresponding path program 1 times [2021-12-17 15:56:57,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:57,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835624158] [2021-12-17 15:56:57,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:57,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:57,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:56:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:56:57,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:56:57,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835624158] [2021-12-17 15:56:57,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835624158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:56:57,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:56:57,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:56:57,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638181717] [2021-12-17 15:56:57,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:56:57,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:56:57,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:56:57,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:56:57,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:56:57,132 INFO L87 Difference]: Start difference. First operand 1106 states and 1841 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:57,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:56:57,185 INFO L93 Difference]: Finished difference Result 2846 states and 4747 transitions. [2021-12-17 15:56:57,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:56:57,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-12-17 15:56:57,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:56:57,194 INFO L225 Difference]: With dead ends: 2846 [2021-12-17 15:56:57,195 INFO L226 Difference]: Without dead ends: 1936 [2021-12-17 15:56:57,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:56:57,199 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 182 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:56:57,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 1034 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:56:57,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-12-17 15:56:57,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1926. [2021-12-17 15:56:57,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 1.6566233766233767) internal successors, (3189), 1925 states have internal predecessors, (3189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:57,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 3189 transitions. [2021-12-17 15:56:57,269 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 3189 transitions. Word has length 131 [2021-12-17 15:56:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:56:57,270 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 3189 transitions. [2021-12-17 15:56:57,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:57,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 3189 transitions. [2021-12-17 15:56:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-17 15:56:57,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:57,272 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:57,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 15:56:57,273 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:57,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1321209626, now seen corresponding path program 1 times [2021-12-17 15:56:57,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:57,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058943165] [2021-12-17 15:56:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:57,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:56:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:56:57,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:56:57,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058943165] [2021-12-17 15:56:57,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058943165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:56:57,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:56:57,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:56:57,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021251398] [2021-12-17 15:56:57,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:56:57,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:56:57,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:56:57,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:56:57,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:56:57,371 INFO L87 Difference]: Start difference. First operand 1926 states and 3189 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:56:57,679 INFO L93 Difference]: Finished difference Result 9994 states and 16717 transitions. [2021-12-17 15:56:57,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 15:56:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-17 15:56:57,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:56:57,713 INFO L225 Difference]: With dead ends: 9994 [2021-12-17 15:56:57,713 INFO L226 Difference]: Without dead ends: 8264 [2021-12-17 15:56:57,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 15:56:57,722 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 2132 mSDsluCounter, 3384 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2132 SdHoareTripleChecker+Valid, 3917 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:56:57,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2132 Valid, 3917 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:56:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8264 states. [2021-12-17 15:56:57,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8264 to 3541. [2021-12-17 15:56:57,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 3540 states have (on average 1.657909604519774) internal successors, (5869), 3540 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5869 transitions. [2021-12-17 15:56:57,919 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5869 transitions. Word has length 134 [2021-12-17 15:56:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:56:57,920 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 5869 transitions. [2021-12-17 15:56:57,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5869 transitions. [2021-12-17 15:56:57,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-17 15:56:57,923 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:57,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:57,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 15:56:57,924 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:57,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:57,925 INFO L85 PathProgramCache]: Analyzing trace with hash -102431977, now seen corresponding path program 1 times [2021-12-17 15:56:57,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:57,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525317814] [2021-12-17 15:56:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:57,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:56:57,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:56:57,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:56:57,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525317814] [2021-12-17 15:56:57,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525317814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:56:57,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:56:57,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:56:57,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2715439] [2021-12-17 15:56:57,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:56:57,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:56:57,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:56:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:56:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:56:57,996 INFO L87 Difference]: Start difference. First operand 3541 states and 5869 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:58,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:56:58,177 INFO L93 Difference]: Finished difference Result 10358 states and 17276 transitions. [2021-12-17 15:56:58,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:56:58,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-12-17 15:56:58,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:56:58,204 INFO L225 Difference]: With dead ends: 10358 [2021-12-17 15:56:58,204 INFO L226 Difference]: Without dead ends: 7013 [2021-12-17 15:56:58,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:56:58,209 INFO L933 BasicCegarLoop]: 534 mSDtfsCounter, 661 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 1614 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:56:58,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 1614 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:56:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7013 states. [2021-12-17 15:56:58,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7013 to 5260. [2021-12-17 15:56:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5260 states, 5259 states have (on average 1.6609621601064841) internal successors, (8735), 5259 states have internal predecessors, (8735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5260 states to 5260 states and 8735 transitions. [2021-12-17 15:56:58,405 INFO L78 Accepts]: Start accepts. Automaton has 5260 states and 8735 transitions. Word has length 135 [2021-12-17 15:56:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:56:58,405 INFO L470 AbstractCegarLoop]: Abstraction has 5260 states and 8735 transitions. [2021-12-17 15:56:58,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 5260 states and 8735 transitions. [2021-12-17 15:56:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-17 15:56:58,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:58,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:58,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 15:56:58,410 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:58,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:58,411 INFO L85 PathProgramCache]: Analyzing trace with hash -806026179, now seen corresponding path program 1 times [2021-12-17 15:56:58,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:58,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202254374] [2021-12-17 15:56:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:58,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:56:58,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:56:58,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:56:58,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202254374] [2021-12-17 15:56:58,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202254374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:56:58,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:56:58,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:56:58,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570999528] [2021-12-17 15:56:58,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:56:58,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:56:58,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:56:58,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:56:58,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:56:58,474 INFO L87 Difference]: Start difference. First operand 5260 states and 8735 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:56:58,693 INFO L93 Difference]: Finished difference Result 15432 states and 25708 transitions. [2021-12-17 15:56:58,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:56:58,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-17 15:56:58,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:56:58,728 INFO L225 Difference]: With dead ends: 15432 [2021-12-17 15:56:58,729 INFO L226 Difference]: Without dead ends: 10368 [2021-12-17 15:56:58,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:56:58,740 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 659 mSDsluCounter, 1128 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:56:58,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 1661 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:56:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10368 states. [2021-12-17 15:56:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10368 to 7790. [2021-12-17 15:56:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7790 states, 7789 states have (on average 1.6591346771087432) internal successors, (12923), 7789 states have internal predecessors, (12923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 12923 transitions. [2021-12-17 15:56:59,049 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 12923 transitions. Word has length 136 [2021-12-17 15:56:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:56:59,049 INFO L470 AbstractCegarLoop]: Abstraction has 7790 states and 12923 transitions. [2021-12-17 15:56:59,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 12923 transitions. [2021-12-17 15:56:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-17 15:56:59,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:59,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:59,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 15:56:59,055 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:59,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:59,056 INFO L85 PathProgramCache]: Analyzing trace with hash -973605618, now seen corresponding path program 1 times [2021-12-17 15:56:59,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:59,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840717193] [2021-12-17 15:56:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:59,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:56:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:56:59,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:56:59,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840717193] [2021-12-17 15:56:59,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840717193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:56:59,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:56:59,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:56:59,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827819326] [2021-12-17 15:56:59,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:56:59,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:56:59,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:56:59,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:56:59,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:56:59,195 INFO L87 Difference]: Start difference. First operand 7790 states and 12923 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:56:59,478 INFO L93 Difference]: Finished difference Result 22912 states and 38120 transitions. [2021-12-17 15:56:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:56:59,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2021-12-17 15:56:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:56:59,517 INFO L225 Difference]: With dead ends: 22912 [2021-12-17 15:56:59,518 INFO L226 Difference]: Without dead ends: 15318 [2021-12-17 15:56:59,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:56:59,530 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 657 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 1774 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:56:59,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 1774 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:56:59,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15318 states. [2021-12-17 15:56:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15318 to 11520. [2021-12-17 15:56:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11520 states, 11519 states have (on average 1.6571751020053824) internal successors, (19089), 11519 states have internal predecessors, (19089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:59,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11520 states to 11520 states and 19089 transitions. [2021-12-17 15:56:59,935 INFO L78 Accepts]: Start accepts. Automaton has 11520 states and 19089 transitions. Word has length 137 [2021-12-17 15:56:59,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:56:59,935 INFO L470 AbstractCegarLoop]: Abstraction has 11520 states and 19089 transitions. [2021-12-17 15:56:59,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:56:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 11520 states and 19089 transitions. [2021-12-17 15:56:59,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 15:56:59,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:56:59,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:56:59,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 15:56:59,941 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:56:59,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:56:59,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1704596588, now seen corresponding path program 1 times [2021-12-17 15:56:59,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:56:59,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945693368] [2021-12-17 15:56:59,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:56:59,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:56:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:57:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:57:00,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:57:00,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945693368] [2021-12-17 15:57:00,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945693368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:57:00,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:57:00,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 15:57:00,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556802990] [2021-12-17 15:57:00,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:57:00,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 15:57:00,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:57:00,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 15:57:00,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 15:57:00,019 INFO L87 Difference]: Start difference. First operand 11520 states and 19089 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 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) [2021-12-17 15:57:00,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:57:00,469 INFO L93 Difference]: Finished difference Result 33796 states and 56192 transitions. [2021-12-17 15:57:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 15:57:00,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 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) Word has length 138 [2021-12-17 15:57:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:57:00,520 INFO L225 Difference]: With dead ends: 33796 [2021-12-17 15:57:00,521 INFO L226 Difference]: Without dead ends: 22472 [2021-12-17 15:57:00,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 15:57:00,538 INFO L933 BasicCegarLoop]: 535 mSDtfsCounter, 655 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1776 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:57:00,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 1776 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:57:00,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22472 states. [2021-12-17 15:57:00,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22472 to 16948. [2021-12-17 15:57:01,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16948 states, 16947 states have (on average 1.6562813477311618) internal successors, (28069), 16947 states have internal predecessors, (28069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:01,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16948 states to 16948 states and 28069 transitions. [2021-12-17 15:57:01,054 INFO L78 Accepts]: Start accepts. Automaton has 16948 states and 28069 transitions. Word has length 138 [2021-12-17 15:57:01,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:57:01,055 INFO L470 AbstractCegarLoop]: Abstraction has 16948 states and 28069 transitions. [2021-12-17 15:57:01,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 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) [2021-12-17 15:57:01,055 INFO L276 IsEmpty]: Start isEmpty. Operand 16948 states and 28069 transitions. [2021-12-17 15:57:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 15:57:01,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:57:01,062 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:57:01,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 15:57:01,063 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:57:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:57:01,063 INFO L85 PathProgramCache]: Analyzing trace with hash 129894331, now seen corresponding path program 1 times [2021-12-17 15:57:01,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:57:01,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129854761] [2021-12-17 15:57:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:57:01,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:57:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:57:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:57:01,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:57:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129854761] [2021-12-17 15:57:01,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129854761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:57:01,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:57:01,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:57:01,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274714997] [2021-12-17 15:57:01,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:57:01,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:57:01,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:57:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:57:01,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:57:01,134 INFO L87 Difference]: Start difference. First operand 16948 states and 28069 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) [2021-12-17 15:57:01,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:57:01,560 INFO L93 Difference]: Finished difference Result 38152 states and 63185 transitions. [2021-12-17 15:57:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:57:01,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) Word has length 138 [2021-12-17 15:57:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:57:01,629 INFO L225 Difference]: With dead ends: 38152 [2021-12-17 15:57:01,630 INFO L226 Difference]: Without dead ends: 26354 [2021-12-17 15:57:01,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:57:01,650 INFO L933 BasicCegarLoop]: 628 mSDtfsCounter, 189 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1132 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 [2021-12-17 15:57:01,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 1132 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:57:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26354 states. [2021-12-17 15:57:02,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26354 to 26352. [2021-12-17 15:57:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26352 states, 26351 states have (on average 1.6485522371067511) internal successors, (43441), 26351 states have internal predecessors, (43441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:02,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26352 states to 26352 states and 43441 transitions. [2021-12-17 15:57:02,424 INFO L78 Accepts]: Start accepts. Automaton has 26352 states and 43441 transitions. Word has length 138 [2021-12-17 15:57:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:57:02,425 INFO L470 AbstractCegarLoop]: Abstraction has 26352 states and 43441 transitions. [2021-12-17 15:57:02,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) [2021-12-17 15:57:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 26352 states and 43441 transitions. [2021-12-17 15:57:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 15:57:02,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:57:02,429 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:57:02,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 15:57:02,429 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:57:02,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:57:02,430 INFO L85 PathProgramCache]: Analyzing trace with hash -807858639, now seen corresponding path program 1 times [2021-12-17 15:57:02,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:57:02,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678859637] [2021-12-17 15:57:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:57:02,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:57:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:57:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:57:02,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:57:02,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678859637] [2021-12-17 15:57:02,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678859637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:57:02,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:57:02,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:57:02,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972549136] [2021-12-17 15:57:02,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:57:02,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:57:02,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:57:02,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:57:02,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:57:02,626 INFO L87 Difference]: Start difference. First operand 26352 states and 43441 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) [2021-12-17 15:57:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:57:03,256 INFO L93 Difference]: Finished difference Result 58622 states and 96675 transitions. [2021-12-17 15:57:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:57:03,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) Word has length 138 [2021-12-17 15:57:03,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:57:03,352 INFO L225 Difference]: With dead ends: 58622 [2021-12-17 15:57:03,352 INFO L226 Difference]: Without dead ends: 40268 [2021-12-17 15:57:03,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:57:03,384 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 196 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1177 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 [2021-12-17 15:57:03,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 1177 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:57:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40268 states. [2021-12-17 15:57:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40268 to 40266. [2021-12-17 15:57:04,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40266 states, 40265 states have (on average 1.641053023717869) internal successors, (66077), 40265 states have internal predecessors, (66077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40266 states to 40266 states and 66077 transitions. [2021-12-17 15:57:04,330 INFO L78 Accepts]: Start accepts. Automaton has 40266 states and 66077 transitions. Word has length 138 [2021-12-17 15:57:04,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:57:04,330 INFO L470 AbstractCegarLoop]: Abstraction has 40266 states and 66077 transitions. [2021-12-17 15:57:04,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) [2021-12-17 15:57:04,331 INFO L276 IsEmpty]: Start isEmpty. Operand 40266 states and 66077 transitions. [2021-12-17 15:57:04,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-17 15:57:04,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:57:04,333 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:57:04,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 15:57:04,333 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:57:04,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:57:04,334 INFO L85 PathProgramCache]: Analyzing trace with hash -332007685, now seen corresponding path program 1 times [2021-12-17 15:57:04,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:57:04,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902833981] [2021-12-17 15:57:04,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:57:04,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:57:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:57:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:57:04,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:57:04,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902833981] [2021-12-17 15:57:04,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902833981] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:57:04,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:57:04,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:57:04,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373609200] [2021-12-17 15:57:04,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:57:04,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:57:04,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:57:04,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:57:04,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:57:04,398 INFO L87 Difference]: Start difference. First operand 40266 states and 66077 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) [2021-12-17 15:57:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:57:05,655 INFO L93 Difference]: Finished difference Result 90058 states and 148401 transitions. [2021-12-17 15:57:05,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:57:05,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) Word has length 138 [2021-12-17 15:57:05,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:57:05,812 INFO L225 Difference]: With dead ends: 90058 [2021-12-17 15:57:05,813 INFO L226 Difference]: Without dead ends: 61494 [2021-12-17 15:57:05,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:57:05,848 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 203 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1214 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 [2021-12-17 15:57:05,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1214 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:57:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61494 states. [2021-12-17 15:57:07,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61494 to 61492. [2021-12-17 15:57:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61492 states, 61491 states have (on average 1.6366460132377096) internal successors, (100639), 61491 states have internal predecessors, (100639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:07,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61492 states to 61492 states and 100639 transitions. [2021-12-17 15:57:07,221 INFO L78 Accepts]: Start accepts. Automaton has 61492 states and 100639 transitions. Word has length 138 [2021-12-17 15:57:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:57:07,222 INFO L470 AbstractCegarLoop]: Abstraction has 61492 states and 100639 transitions. [2021-12-17 15:57:07,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 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) [2021-12-17 15:57:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 61492 states and 100639 transitions. [2021-12-17 15:57:07,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-17 15:57:07,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:57:07,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:57:07,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 15:57:07,224 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:57:07,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:57:07,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1686527611, now seen corresponding path program 1 times [2021-12-17 15:57:07,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:57:07,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681248994] [2021-12-17 15:57:07,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:57:07,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:57:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:57:07,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:57:07,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:57:07,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681248994] [2021-12-17 15:57:07,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681248994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:57:07,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:57:07,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 15:57:07,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108037344] [2021-12-17 15:57:07,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:57:07,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 15:57:07,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:57:07,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 15:57:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:57:07,277 INFO L87 Difference]: Start difference. First operand 61492 states and 100639 transitions. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:57:08,883 INFO L93 Difference]: Finished difference Result 135406 states and 221664 transitions. [2021-12-17 15:57:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 15:57:08,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-12-17 15:57:08,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:57:09,115 INFO L225 Difference]: With dead ends: 135406 [2021-12-17 15:57:09,115 INFO L226 Difference]: Without dead ends: 92182 [2021-12-17 15:57:09,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 15:57:09,190 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 180 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 1148 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 [2021-12-17 15:57:09,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 1148 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:57:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92182 states. [2021-12-17 15:57:10,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92182 to 92180. [2021-12-17 15:57:11,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92180 states, 92179 states have (on average 1.625055598346695) internal successors, (149796), 92179 states have internal predecessors, (149796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:11,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92180 states to 92180 states and 149796 transitions. [2021-12-17 15:57:11,237 INFO L78 Accepts]: Start accepts. Automaton has 92180 states and 149796 transitions. Word has length 139 [2021-12-17 15:57:11,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:57:11,238 INFO L470 AbstractCegarLoop]: Abstraction has 92180 states and 149796 transitions. [2021-12-17 15:57:11,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:11,238 INFO L276 IsEmpty]: Start isEmpty. Operand 92180 states and 149796 transitions. [2021-12-17 15:57:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-17 15:57:11,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:57:11,240 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:57:11,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 15:57:11,240 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:57:11,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:57:11,241 INFO L85 PathProgramCache]: Analyzing trace with hash 344039084, now seen corresponding path program 1 times [2021-12-17 15:57:11,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:57:11,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992837997] [2021-12-17 15:57:11,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:57:11,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:57:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:57:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:57:11,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:57:11,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992837997] [2021-12-17 15:57:11,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992837997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:57:11,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:57:11,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:57:11,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095716993] [2021-12-17 15:57:11,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:57:11,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:57:11,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:57:11,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:57:11,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:57:11,392 INFO L87 Difference]: Start difference. First operand 92180 states and 149796 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:13,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:57:13,210 INFO L93 Difference]: Finished difference Result 184116 states and 299200 transitions. [2021-12-17 15:57:13,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 15:57:13,211 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-17 15:57:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:57:13,622 INFO L225 Difference]: With dead ends: 184116 [2021-12-17 15:57:13,623 INFO L226 Difference]: Without dead ends: 92182 [2021-12-17 15:57:13,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:57:13,673 INFO L933 BasicCegarLoop]: 540 mSDtfsCounter, 529 mSDsluCounter, 1509 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 2049 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:57:13,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 2049 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:57:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92182 states. [2021-12-17 15:57:15,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92182 to 92180. [2021-12-17 15:57:15,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92180 states, 92179 states have (on average 1.6182753121643758) internal successors, (149171), 92179 states have internal predecessors, (149171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92180 states to 92180 states and 149171 transitions. [2021-12-17 15:57:15,521 INFO L78 Accepts]: Start accepts. Automaton has 92180 states and 149171 transitions. Word has length 140 [2021-12-17 15:57:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:57:15,522 INFO L470 AbstractCegarLoop]: Abstraction has 92180 states and 149171 transitions. [2021-12-17 15:57:15,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:15,522 INFO L276 IsEmpty]: Start isEmpty. Operand 92180 states and 149171 transitions. [2021-12-17 15:57:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-17 15:57:15,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:57:15,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:57:15,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 15:57:15,523 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:57:15,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:57:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash 429168721, now seen corresponding path program 1 times [2021-12-17 15:57:15,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:57:15,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690246997] [2021-12-17 15:57:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:57:15,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:57:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:57:15,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:57:15,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:57:15,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690246997] [2021-12-17 15:57:15,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690246997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:57:15,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:57:15,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 15:57:15,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868613892] [2021-12-17 15:57:15,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:57:15,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 15:57:15,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:57:15,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 15:57:15,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 15:57:15,929 INFO L87 Difference]: Start difference. First operand 92180 states and 149171 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:57:18,679 INFO L93 Difference]: Finished difference Result 269524 states and 436612 transitions. [2021-12-17 15:57:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 15:57:18,679 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-12-17 15:57:18,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:57:19,042 INFO L225 Difference]: With dead ends: 269524 [2021-12-17 15:57:19,042 INFO L226 Difference]: Without dead ends: 177590 [2021-12-17 15:57:19,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:57:19,118 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 705 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 15:57:19,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 2059 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 15:57:19,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177590 states. [2021-12-17 15:57:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177590 to 177588. [2021-12-17 15:57:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177588 states, 177587 states have (on average 1.609442132588534) internal successors, (285816), 177587 states have internal predecessors, (285816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177588 states to 177588 states and 285816 transitions. [2021-12-17 15:57:23,367 INFO L78 Accepts]: Start accepts. Automaton has 177588 states and 285816 transitions. Word has length 143 [2021-12-17 15:57:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 15:57:23,368 INFO L470 AbstractCegarLoop]: Abstraction has 177588 states and 285816 transitions. [2021-12-17 15:57:23,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 177588 states and 285816 transitions. [2021-12-17 15:57:23,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-17 15:57:23,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 15:57:23,369 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 15:57:23,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 15:57:23,369 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 15:57:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 15:57:23,370 INFO L85 PathProgramCache]: Analyzing trace with hash -12016747, now seen corresponding path program 1 times [2021-12-17 15:57:23,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 15:57:23,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125038451] [2021-12-17 15:57:23,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 15:57:23,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 15:57:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 15:57:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 15:57:23,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 15:57:23,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125038451] [2021-12-17 15:57:23,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125038451] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 15:57:23,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 15:57:23,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 15:57:23,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547442030] [2021-12-17 15:57:23,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 15:57:23,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 15:57:23,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 15:57:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 15:57:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 15:57:23,559 INFO L87 Difference]: Start difference. First operand 177588 states and 285816 transitions. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 15:57:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 15:57:29,578 INFO L93 Difference]: Finished difference Result 342115 states and 546273 transitions. [2021-12-17 15:57:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 15:57:29,579 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-12-17 15:57:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 15:57:30,353 INFO L225 Difference]: With dead ends: 342115 [2021-12-17 15:57:30,354 INFO L226 Difference]: Without dead ends: 342113 [2021-12-17 15:57:30,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-17 15:57:30,446 INFO L933 BasicCegarLoop]: 660 mSDtfsCounter, 1627 mSDsluCounter, 2554 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 15:57:30,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1627 Valid, 3214 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 15:57:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342113 states.