./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_floodmax.3.1.ufo.BOUNDED-6.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 8b0406e617bfcdc7e6543e19b38e9be8eeb37f2896cb91bcfe6035d747328da7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:47:39,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:47:39,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:47:40,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:47:40,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:47:40,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:47:40,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:47:40,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:47:40,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:47:40,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:47:40,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:47:40,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:47:40,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:47:40,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:47:40,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:47:40,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:47:40,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:47:40,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:47:40,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:47:40,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:47:40,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:47:40,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:47:40,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:47:40,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:47:40,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:47:40,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:47:40,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:47:40,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:47:40,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:47:40,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:47:40,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:47:40,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:47:40,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:47:40,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:47:40,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:47:40,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:47:40,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:47:40,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:47:40,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:47:40,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:47:40,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:47:40,050 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:47:40,069 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:47:40,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:47:40,070 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:47:40,070 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:47:40,071 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:47:40,071 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:47:40,072 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:47:40,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:47:40,072 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:47:40,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:47:40,073 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:47:40,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:47:40,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:47:40,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:47:40,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:47:40,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:47:40,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:47:40,073 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:47:40,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:47:40,074 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:47:40,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:47:40,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:47:40,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:47:40,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:47:40,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:47:40,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:47:40,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:47:40,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:47:40,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:47:40,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:47:40,075 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:47:40,076 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:47:40,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:47:40,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:47:40,076 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b0406e617bfcdc7e6543e19b38e9be8eeb37f2896cb91bcfe6035d747328da7 [2021-12-22 11:47:40,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:47:40,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:47:40,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:47:40,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:47:40,267 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:47:40,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-22 11:47:40,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0292ebe72/c7264422d887454a8254a84d04939127/FLAGe68a68a25 [2021-12-22 11:47:40,658 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:47:40,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-22 11:47:40,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0292ebe72/c7264422d887454a8254a84d04939127/FLAGe68a68a25 [2021-12-22 11:47:41,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0292ebe72/c7264422d887454a8254a84d04939127 [2021-12-22 11:47:41,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:47:41,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:47:41,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:47:41,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:47:41,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:47:41,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d5920f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41, skipping insertion in model container [2021-12-22 11:47:41,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,084 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:47:41,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:47:41,252 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_floodmax.3.1.ufo.BOUNDED-6.pals.c[11348,11361] [2021-12-22 11:47:41,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:47:41,259 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:47:41,290 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_floodmax.3.1.ufo.BOUNDED-6.pals.c[11348,11361] [2021-12-22 11:47:41,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:47:41,299 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:47:41,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41 WrapperNode [2021-12-22 11:47:41,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:47:41,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:47:41,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:47:41,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:47:41,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,344 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 429 [2021-12-22 11:47:41,345 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:47:41,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:47:41,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:47:41,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:47:41,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:47:41,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:47:41,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:47:41,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:47:41,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (1/1) ... [2021-12-22 11:47:41,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:47:41,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:47:41,442 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) [2021-12-22 11:47:41,460 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 [2021-12-22 11:47:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:47:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:47:41,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:47:41,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:47:41,535 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:47:41,537 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:47:41,886 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:47:41,891 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:47:41,892 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:47:41,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:47:41 BoogieIcfgContainer [2021-12-22 11:47:41,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:47:41,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:47:41,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:47:41,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:47:41,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:47:41" (1/3) ... [2021-12-22 11:47:41,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc1ecd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:47:41, skipping insertion in model container [2021-12-22 11:47:41,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:47:41" (2/3) ... [2021-12-22 11:47:41,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fc1ecd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:47:41, skipping insertion in model container [2021-12-22 11:47:41,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:47:41" (3/3) ... [2021-12-22 11:47:41,902 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c [2021-12-22 11:47:41,905 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:47:41,905 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:47:41,955 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:47:41,961 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 [2021-12-22 11:47:41,961 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:47:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 124 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:41,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 11:47:41,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:41,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:41,991 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:41,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash 632685314, now seen corresponding path program 1 times [2021-12-22 11:47:42,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:42,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188896195] [2021-12-22 11:47:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:42,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:42,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:42,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:42,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188896195] [2021-12-22 11:47:42,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188896195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:42,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:42,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:47:42,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977150559] [2021-12-22 11:47:42,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:42,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:47:42,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:42,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:47:42,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:47:42,216 INFO L87 Difference]: Start difference. First operand has 125 states, 123 states have (on average 1.7479674796747968) internal successors, (215), 124 states have internal predecessors, (215), 0 states have call successors, (0), 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 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:42,251 INFO L93 Difference]: Finished difference Result 200 states and 340 transitions. [2021-12-22 11:47:42,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:47:42,252 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-22 11:47:42,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:42,259 INFO L225 Difference]: With dead ends: 200 [2021-12-22 11:47:42,259 INFO L226 Difference]: Without dead ends: 121 [2021-12-22 11:47:42,264 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 [2021-12-22 11:47:42,281 INFO L933 BasicCegarLoop]: 212 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, 212 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 [2021-12-22 11:47:42,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-22 11:47:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-12-22 11:47:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.7333333333333334) internal successors, (208), 120 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 208 transitions. [2021-12-22 11:47:42,335 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 208 transitions. Word has length 37 [2021-12-22 11:47:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:42,336 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 208 transitions. [2021-12-22 11:47:42,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 208 transitions. [2021-12-22 11:47:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 11:47:42,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:42,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:42,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:47:42,339 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash -184963136, now seen corresponding path program 1 times [2021-12-22 11:47:42,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:42,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589353300] [2021-12-22 11:47:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:42,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:42,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:42,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589353300] [2021-12-22 11:47:42,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589353300] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:42,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:42,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:42,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166850975] [2021-12-22 11:47:42,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:42,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:42,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:42,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:42,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:42,479 INFO L87 Difference]: Start difference. First operand 121 states and 208 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:42,568 INFO L93 Difference]: Finished difference Result 265 states and 448 transitions. [2021-12-22 11:47:42,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:47:42,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-22 11:47:42,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:42,570 INFO L225 Difference]: With dead ends: 265 [2021-12-22 11:47:42,571 INFO L226 Difference]: Without dead ends: 191 [2021-12-22 11:47:42,572 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 [2021-12-22 11:47:42,573 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 120 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:42,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 790 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:47:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-22 11:47:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 121. [2021-12-22 11:47:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.5583333333333333) internal successors, (187), 120 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 187 transitions. [2021-12-22 11:47:42,584 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 187 transitions. Word has length 37 [2021-12-22 11:47:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:42,584 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 187 transitions. [2021-12-22 11:47:42,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 187 transitions. [2021-12-22 11:47:42,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 11:47:42,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:42,587 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] [2021-12-22 11:47:42,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:47:42,589 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:42,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1843152740, now seen corresponding path program 1 times [2021-12-22 11:47:42,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:42,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873539650] [2021-12-22 11:47:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:42,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:42,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:42,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873539650] [2021-12-22 11:47:42,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873539650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:42,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:42,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:42,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013754402] [2021-12-22 11:47:42,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:42,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:42,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:42,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:42,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:42,684 INFO L87 Difference]: Start difference. First operand 121 states and 187 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:42,723 INFO L93 Difference]: Finished difference Result 252 states and 406 transitions. [2021-12-22 11:47:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:42,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-22 11:47:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:42,725 INFO L225 Difference]: With dead ends: 252 [2021-12-22 11:47:42,725 INFO L226 Difference]: Without dead ends: 182 [2021-12-22 11:47:42,725 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 [2021-12-22 11:47:42,726 INFO L933 BasicCegarLoop]: 262 mSDtfsCounter, 93 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:42,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 415 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-22 11:47:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2021-12-22 11:47:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.5754189944134078) internal successors, (282), 179 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 282 transitions. [2021-12-22 11:47:42,738 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 282 transitions. Word has length 57 [2021-12-22 11:47:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:42,739 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 282 transitions. [2021-12-22 11:47:42,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 282 transitions. [2021-12-22 11:47:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 11:47:42,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:42,741 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] [2021-12-22 11:47:42,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:47:42,741 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:42,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:42,742 INFO L85 PathProgramCache]: Analyzing trace with hash 700379209, now seen corresponding path program 1 times [2021-12-22 11:47:42,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:42,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708505884] [2021-12-22 11:47:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:42,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:42,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708505884] [2021-12-22 11:47:42,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708505884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:42,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:42,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:42,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205310932] [2021-12-22 11:47:42,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:42,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:42,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:42,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:42,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:42,819 INFO L87 Difference]: Start difference. First operand 180 states and 282 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:42,837 INFO L93 Difference]: Finished difference Result 307 states and 495 transitions. [2021-12-22 11:47:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:42,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-22 11:47:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:42,840 INFO L225 Difference]: With dead ends: 307 [2021-12-22 11:47:42,840 INFO L226 Difference]: Without dead ends: 237 [2021-12-22 11:47:42,843 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 [2021-12-22 11:47:42,850 INFO L933 BasicCegarLoop]: 267 mSDtfsCounter, 102 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 429 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 [2021-12-22 11:47:42,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 429 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:42,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-12-22 11:47:42,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2021-12-22 11:47:42,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.5982905982905984) internal successors, (374), 234 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 374 transitions. [2021-12-22 11:47:42,872 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 374 transitions. Word has length 59 [2021-12-22 11:47:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:42,874 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 374 transitions. [2021-12-22 11:47:42,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,874 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 374 transitions. [2021-12-22 11:47:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 11:47:42,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:42,878 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] [2021-12-22 11:47:42,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:47:42,879 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:42,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:42,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1943315629, now seen corresponding path program 1 times [2021-12-22 11:47:42,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:42,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104138546] [2021-12-22 11:47:42,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:42,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:42,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:42,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104138546] [2021-12-22 11:47:42,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104138546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:42,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:42,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:42,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271351967] [2021-12-22 11:47:42,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:42,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:42,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:42,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:42,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:42,947 INFO L87 Difference]: Start difference. First operand 235 states and 374 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:42,966 INFO L93 Difference]: Finished difference Result 578 states and 941 transitions. [2021-12-22 11:47:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:42,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-22 11:47:42,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:42,968 INFO L225 Difference]: With dead ends: 578 [2021-12-22 11:47:42,969 INFO L226 Difference]: Without dead ends: 396 [2021-12-22 11:47:42,970 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 [2021-12-22 11:47:42,972 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 95 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:42,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 422 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-12-22 11:47:42,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 394. [2021-12-22 11:47:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 1.61323155216285) internal successors, (634), 393 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 634 transitions. [2021-12-22 11:47:43,003 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 634 transitions. Word has length 59 [2021-12-22 11:47:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:43,004 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 634 transitions. [2021-12-22 11:47:43,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 634 transitions. [2021-12-22 11:47:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 11:47:43,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:43,009 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] [2021-12-22 11:47:43,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:47:43,009 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:43,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1342077512, now seen corresponding path program 1 times [2021-12-22 11:47:43,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:43,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746676278] [2021-12-22 11:47:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:43,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:43,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:43,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:43,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746676278] [2021-12-22 11:47:43,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746676278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:43,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:43,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:43,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028443659] [2021-12-22 11:47:43,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:43,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:43,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:43,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:43,067 INFO L87 Difference]: Start difference. First operand 394 states and 634 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:43,087 INFO L93 Difference]: Finished difference Result 723 states and 1177 transitions. [2021-12-22 11:47:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:43,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-22 11:47:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:43,089 INFO L225 Difference]: With dead ends: 723 [2021-12-22 11:47:43,089 INFO L226 Difference]: Without dead ends: 541 [2021-12-22 11:47:43,090 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 [2021-12-22 11:47:43,091 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 96 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 415 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 [2021-12-22 11:47:43,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 415 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:43,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-12-22 11:47:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 539. [2021-12-22 11:47:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.6152416356877324) internal successors, (869), 538 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 869 transitions. [2021-12-22 11:47:43,104 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 869 transitions. Word has length 61 [2021-12-22 11:47:43,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:43,104 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 869 transitions. [2021-12-22 11:47:43,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,104 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 869 transitions. [2021-12-22 11:47:43,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 11:47:43,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:43,105 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] [2021-12-22 11:47:43,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:47:43,105 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:43,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:43,106 INFO L85 PathProgramCache]: Analyzing trace with hash -308214334, now seen corresponding path program 1 times [2021-12-22 11:47:43,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:43,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336117065] [2021-12-22 11:47:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:43,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:43,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:43,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336117065] [2021-12-22 11:47:43,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336117065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:43,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:43,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:43,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523824495] [2021-12-22 11:47:43,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:43,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:43,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:43,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:43,170 INFO L87 Difference]: Start difference. First operand 539 states and 869 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:43,191 INFO L93 Difference]: Finished difference Result 1428 states and 2320 transitions. [2021-12-22 11:47:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-22 11:47:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:43,196 INFO L225 Difference]: With dead ends: 1428 [2021-12-22 11:47:43,196 INFO L226 Difference]: Without dead ends: 952 [2021-12-22 11:47:43,196 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 [2021-12-22 11:47:43,197 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 89 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:43,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 358 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:43,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-12-22 11:47:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 950. [2021-12-22 11:47:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 1.608008429926238) internal successors, (1526), 949 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1526 transitions. [2021-12-22 11:47:43,223 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1526 transitions. Word has length 61 [2021-12-22 11:47:43,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:43,224 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1526 transitions. [2021-12-22 11:47:43,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1526 transitions. [2021-12-22 11:47:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 11:47:43,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:43,226 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] [2021-12-22 11:47:43,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:47:43,226 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash 349619889, now seen corresponding path program 1 times [2021-12-22 11:47:43,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:43,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851685535] [2021-12-22 11:47:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:43,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:43,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:43,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851685535] [2021-12-22 11:47:43,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851685535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:43,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:43,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:43,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059314350] [2021-12-22 11:47:43,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:43,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:43,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:43,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:43,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:43,291 INFO L87 Difference]: Start difference. First operand 950 states and 1526 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:43,451 INFO L93 Difference]: Finished difference Result 4661 states and 7632 transitions. [2021-12-22 11:47:43,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:47:43,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-22 11:47:43,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:43,464 INFO L225 Difference]: With dead ends: 4661 [2021-12-22 11:47:43,464 INFO L226 Difference]: Without dead ends: 3774 [2021-12-22 11:47:43,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:47:43,467 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 865 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:43,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [865 Valid, 906 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:47:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-12-22 11:47:43,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 1770. [2021-12-22 11:47:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1769 states have (on average 1.607687959299039) internal successors, (2844), 1769 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2844 transitions. [2021-12-22 11:47:43,554 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2844 transitions. Word has length 63 [2021-12-22 11:47:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:43,554 INFO L470 AbstractCegarLoop]: Abstraction has 1770 states and 2844 transitions. [2021-12-22 11:47:43,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2844 transitions. [2021-12-22 11:47:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 11:47:43,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:43,555 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] [2021-12-22 11:47:43,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:47:43,556 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:43,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:43,556 INFO L85 PathProgramCache]: Analyzing trace with hash 325449286, now seen corresponding path program 1 times [2021-12-22 11:47:43,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:43,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972615873] [2021-12-22 11:47:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:43,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:43,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:43,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972615873] [2021-12-22 11:47:43,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972615873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:43,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:43,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:47:43,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115551244] [2021-12-22 11:47:43,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:43,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:47:43,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:43,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:47:43,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:47:43,596 INFO L87 Difference]: Start difference. First operand 1770 states and 2844 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:43,805 INFO L93 Difference]: Finished difference Result 5679 states and 9231 transitions. [2021-12-22 11:47:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:47:43,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-22 11:47:43,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:43,818 INFO L225 Difference]: With dead ends: 5679 [2021-12-22 11:47:43,818 INFO L226 Difference]: Without dead ends: 3972 [2021-12-22 11:47:43,821 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 [2021-12-22 11:47:43,823 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 338 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 603 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 [2021-12-22 11:47:43,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 603 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:43,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2021-12-22 11:47:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 2858. [2021-12-22 11:47:43,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2858 states, 2857 states have (on average 1.6107805390269514) internal successors, (4602), 2857 states have internal predecessors, (4602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4602 transitions. [2021-12-22 11:47:43,938 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4602 transitions. Word has length 64 [2021-12-22 11:47:43,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:43,939 INFO L470 AbstractCegarLoop]: Abstraction has 2858 states and 4602 transitions. [2021-12-22 11:47:43,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4602 transitions. [2021-12-22 11:47:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 11:47:43,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:43,940 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] [2021-12-22 11:47:43,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:47:43,941 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:43,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:43,941 INFO L85 PathProgramCache]: Analyzing trace with hash 905685231, now seen corresponding path program 1 times [2021-12-22 11:47:43,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:43,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449088624] [2021-12-22 11:47:43,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:43,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:43,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:43,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449088624] [2021-12-22 11:47:43,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449088624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:43,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:43,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:47:43,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726672290] [2021-12-22 11:47:43,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:43,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:47:43,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:47:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:47:43,974 INFO L87 Difference]: Start difference. First operand 2858 states and 4602 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:44,176 INFO L93 Difference]: Finished difference Result 5558 states and 8983 transitions. [2021-12-22 11:47:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:47:44,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-22 11:47:44,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:44,202 INFO L225 Difference]: With dead ends: 5558 [2021-12-22 11:47:44,202 INFO L226 Difference]: Without dead ends: 3988 [2021-12-22 11:47:44,205 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 [2021-12-22 11:47:44,206 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 90 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 407 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 [2021-12-22 11:47:44,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 407 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2021-12-22 11:47:44,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 3986. [2021-12-22 11:47:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3986 states, 3985 states have (on average 1.6005018820577164) internal successors, (6378), 3985 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 6378 transitions. [2021-12-22 11:47:44,365 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 6378 transitions. Word has length 64 [2021-12-22 11:47:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:44,365 INFO L470 AbstractCegarLoop]: Abstraction has 3986 states and 6378 transitions. [2021-12-22 11:47:44,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 6378 transitions. [2021-12-22 11:47:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 11:47:44,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:44,368 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] [2021-12-22 11:47:44,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:47:44,368 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:44,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:44,369 INFO L85 PathProgramCache]: Analyzing trace with hash -254835064, now seen corresponding path program 1 times [2021-12-22 11:47:44,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:44,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189969805] [2021-12-22 11:47:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:44,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:44,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:44,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189969805] [2021-12-22 11:47:44,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189969805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:44,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:44,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:47:44,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720448528] [2021-12-22 11:47:44,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:44,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:47:44,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:44,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:47:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:47:44,436 INFO L87 Difference]: Start difference. First operand 3986 states and 6378 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:44,694 INFO L93 Difference]: Finished difference Result 12749 states and 20489 transitions. [2021-12-22 11:47:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:47:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-12-22 11:47:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:44,740 INFO L225 Difference]: With dead ends: 12749 [2021-12-22 11:47:44,740 INFO L226 Difference]: Without dead ends: 8836 [2021-12-22 11:47:44,744 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 [2021-12-22 11:47:44,745 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 336 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 562 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 [2021-12-22 11:47:44,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 562 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-12-22 11:47:44,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 6382. [2021-12-22 11:47:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6382 states, 6381 states have (on average 1.5919134931828867) internal successors, (10158), 6381 states have internal predecessors, (10158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6382 states to 6382 states and 10158 transitions. [2021-12-22 11:47:44,975 INFO L78 Accepts]: Start accepts. Automaton has 6382 states and 10158 transitions. Word has length 65 [2021-12-22 11:47:44,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:44,976 INFO L470 AbstractCegarLoop]: Abstraction has 6382 states and 10158 transitions. [2021-12-22 11:47:44,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 6382 states and 10158 transitions. [2021-12-22 11:47:44,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 11:47:44,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:44,977 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] [2021-12-22 11:47:44,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:47:44,977 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:44,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:44,977 INFO L85 PathProgramCache]: Analyzing trace with hash -894776387, now seen corresponding path program 1 times [2021-12-22 11:47:44,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:44,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290325697] [2021-12-22 11:47:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:44,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:45,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:45,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290325697] [2021-12-22 11:47:45,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290325697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:45,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:45,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:47:45,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410481113] [2021-12-22 11:47:45,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:45,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:47:45,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:45,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:47:45,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:47:45,014 INFO L87 Difference]: Start difference. First operand 6382 states and 10158 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:45,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:45,403 INFO L93 Difference]: Finished difference Result 20041 states and 32013 transitions. [2021-12-22 11:47:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:47:45,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-22 11:47:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:45,425 INFO L225 Difference]: With dead ends: 20041 [2021-12-22 11:47:45,425 INFO L226 Difference]: Without dead ends: 13732 [2021-12-22 11:47:45,431 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 [2021-12-22 11:47:45,432 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 334 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 612 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 [2021-12-22 11:47:45,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 612 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2021-12-22 11:47:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 10014. [2021-12-22 11:47:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10014 states, 10013 states have (on average 1.582942175172276) internal successors, (15850), 10013 states have internal predecessors, (15850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10014 states to 10014 states and 15850 transitions. [2021-12-22 11:47:45,804 INFO L78 Accepts]: Start accepts. Automaton has 10014 states and 15850 transitions. Word has length 66 [2021-12-22 11:47:45,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:45,805 INFO L470 AbstractCegarLoop]: Abstraction has 10014 states and 15850 transitions. [2021-12-22 11:47:45,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:45,806 INFO L276 IsEmpty]: Start isEmpty. Operand 10014 states and 15850 transitions. [2021-12-22 11:47:45,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 11:47:45,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:45,807 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] [2021-12-22 11:47:45,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:47:45,807 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:45,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:45,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1280795893, now seen corresponding path program 1 times [2021-12-22 11:47:45,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:45,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615205577] [2021-12-22 11:47:45,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:45,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:45,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:45,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615205577] [2021-12-22 11:47:45,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615205577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:45,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:45,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:45,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980184071] [2021-12-22 11:47:45,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:45,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:45,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:45,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:45,903 INFO L87 Difference]: Start difference. First operand 10014 states and 15850 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:46,324 INFO L93 Difference]: Finished difference Result 19957 states and 31602 transitions. [2021-12-22 11:47:46,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:47:46,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-22 11:47:46,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:46,337 INFO L225 Difference]: With dead ends: 19957 [2021-12-22 11:47:46,337 INFO L226 Difference]: Without dead ends: 10016 [2021-12-22 11:47:46,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:47:46,344 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 247 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:46,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 495 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10016 states. [2021-12-22 11:47:46,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10016 to 10014. [2021-12-22 11:47:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10014 states, 10013 states have (on average 1.570458404074703) internal successors, (15725), 10013 states have internal predecessors, (15725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10014 states to 10014 states and 15725 transitions. [2021-12-22 11:47:46,616 INFO L78 Accepts]: Start accepts. Automaton has 10014 states and 15725 transitions. Word has length 68 [2021-12-22 11:47:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:46,616 INFO L470 AbstractCegarLoop]: Abstraction has 10014 states and 15725 transitions. [2021-12-22 11:47:46,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:46,617 INFO L276 IsEmpty]: Start isEmpty. Operand 10014 states and 15725 transitions. [2021-12-22 11:47:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-22 11:47:46,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:46,617 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] [2021-12-22 11:47:46,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:47:46,618 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:46,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1403896683, now seen corresponding path program 1 times [2021-12-22 11:47:46,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:46,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752605669] [2021-12-22 11:47:46,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:46,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:46,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752605669] [2021-12-22 11:47:46,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752605669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:46,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:46,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:46,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734534987] [2021-12-22 11:47:46,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:46,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:46,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:46,718 INFO L87 Difference]: Start difference. First operand 10014 states and 15725 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:47,205 INFO L93 Difference]: Finished difference Result 28683 states and 45188 transitions. [2021-12-22 11:47:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:47:47,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 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 71 [2021-12-22 11:47:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:47,232 INFO L225 Difference]: With dead ends: 28683 [2021-12-22 11:47:47,232 INFO L226 Difference]: Without dead ends: 18742 [2021-12-22 11:47:47,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:47:47,242 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 157 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:47,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 664 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18742 states. [2021-12-22 11:47:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18742 to 18740. [2021-12-22 11:47:48,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18740 states, 18739 states have (on average 1.5567532952665564) internal successors, (29172), 18739 states have internal predecessors, (29172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:48,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18740 states to 18740 states and 29172 transitions. [2021-12-22 11:47:48,074 INFO L78 Accepts]: Start accepts. Automaton has 18740 states and 29172 transitions. Word has length 71 [2021-12-22 11:47:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:48,074 INFO L470 AbstractCegarLoop]: Abstraction has 18740 states and 29172 transitions. [2021-12-22 11:47:48,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:48,075 INFO L276 IsEmpty]: Start isEmpty. Operand 18740 states and 29172 transitions. [2021-12-22 11:47:48,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 11:47:48,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:48,075 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] [2021-12-22 11:47:48,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:47:48,076 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:48,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:48,076 INFO L85 PathProgramCache]: Analyzing trace with hash 142548510, now seen corresponding path program 1 times [2021-12-22 11:47:48,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:48,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654446541] [2021-12-22 11:47:48,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:48,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:47:48,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:48,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654446541] [2021-12-22 11:47:48,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654446541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:48,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:48,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:48,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668760298] [2021-12-22 11:47:48,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:48,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:48,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:48,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:48,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:48,134 INFO L87 Difference]: Start difference. First operand 18740 states and 29172 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:49,234 INFO L93 Difference]: Finished difference Result 36832 states and 56655 transitions. [2021-12-22 11:47:49,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:47:49,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-12-22 11:47:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:49,296 INFO L225 Difference]: With dead ends: 36832 [2021-12-22 11:47:49,296 INFO L226 Difference]: Without dead ends: 36830 [2021-12-22 11:47:49,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:47:49,304 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 296 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:49,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 803 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36830 states. [2021-12-22 11:47:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36830 to 19826. [2021-12-22 11:47:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19826 states, 19825 states have (on average 1.5258007566204288) internal successors, (30249), 19825 states have internal predecessors, (30249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19826 states to 19826 states and 30249 transitions. [2021-12-22 11:47:50,120 INFO L78 Accepts]: Start accepts. Automaton has 19826 states and 30249 transitions. Word has length 72 [2021-12-22 11:47:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:50,120 INFO L470 AbstractCegarLoop]: Abstraction has 19826 states and 30249 transitions. [2021-12-22 11:47:50,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:50,121 INFO L276 IsEmpty]: Start isEmpty. Operand 19826 states and 30249 transitions. [2021-12-22 11:47:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 11:47:50,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:50,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:50,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:47:50,123 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:50,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:50,123 INFO L85 PathProgramCache]: Analyzing trace with hash -561021637, now seen corresponding path program 1 times [2021-12-22 11:47:50,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:50,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194919081] [2021-12-22 11:47:50,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:50,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 11:47:50,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:50,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194919081] [2021-12-22 11:47:50,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194919081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:50,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:50,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:50,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636860715] [2021-12-22 11:47:50,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:50,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:50,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:50,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:50,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:50,169 INFO L87 Difference]: Start difference. First operand 19826 states and 30249 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:51,650 INFO L93 Difference]: Finished difference Result 48524 states and 74305 transitions. [2021-12-22 11:47:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:47:51,651 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-22 11:47:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:51,720 INFO L225 Difference]: With dead ends: 48524 [2021-12-22 11:47:51,720 INFO L226 Difference]: Without dead ends: 39122 [2021-12-22 11:47:51,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:47:51,745 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 422 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:51,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 751 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39122 states. [2021-12-22 11:47:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39122 to 30494. [2021-12-22 11:47:53,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30494 states, 30493 states have (on average 1.5242514675499295) internal successors, (46479), 30493 states have internal predecessors, (46479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30494 states to 30494 states and 46479 transitions. [2021-12-22 11:47:53,185 INFO L78 Accepts]: Start accepts. Automaton has 30494 states and 46479 transitions. Word has length 97 [2021-12-22 11:47:53,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:53,185 INFO L470 AbstractCegarLoop]: Abstraction has 30494 states and 46479 transitions. [2021-12-22 11:47:53,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:53,185 INFO L276 IsEmpty]: Start isEmpty. Operand 30494 states and 46479 transitions. [2021-12-22 11:47:53,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 11:47:53,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:53,188 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:53,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:47:53,188 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:53,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1328546247, now seen corresponding path program 1 times [2021-12-22 11:47:53,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:53,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159557317] [2021-12-22 11:47:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:53,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:47:53,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:53,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159557317] [2021-12-22 11:47:53,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159557317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:53,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:53,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:53,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124041238] [2021-12-22 11:47:53,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:53,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:53,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:53,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:53,227 INFO L87 Difference]: Start difference. First operand 30494 states and 46479 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:54,648 INFO L93 Difference]: Finished difference Result 52292 states and 80089 transitions. [2021-12-22 11:47:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:47:54,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-22 11:47:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:54,706 INFO L225 Difference]: With dead ends: 52292 [2021-12-22 11:47:54,707 INFO L226 Difference]: Without dead ends: 42890 [2021-12-22 11:47:54,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:47:54,725 INFO L933 BasicCegarLoop]: 296 mSDtfsCounter, 415 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:54,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 811 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:54,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42890 states. [2021-12-22 11:47:56,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42890 to 41332. [2021-12-22 11:47:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41332 states, 41331 states have (on average 1.5250296387699305) internal successors, (63031), 41331 states have internal predecessors, (63031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41332 states to 41332 states and 63031 transitions. [2021-12-22 11:47:56,734 INFO L78 Accepts]: Start accepts. Automaton has 41332 states and 63031 transitions. Word has length 97 [2021-12-22 11:47:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:47:56,735 INFO L470 AbstractCegarLoop]: Abstraction has 41332 states and 63031 transitions. [2021-12-22 11:47:56,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 41332 states and 63031 transitions. [2021-12-22 11:47:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 11:47:56,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:47:56,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:47:56,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 11:47:56,740 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:47:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:47:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 425698093, now seen corresponding path program 1 times [2021-12-22 11:47:56,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:47:56,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883812429] [2021-12-22 11:47:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:47:56,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:47:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:47:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:47:56,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:47:56,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883812429] [2021-12-22 11:47:56,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883812429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:47:56,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:47:56,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:47:56,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227300081] [2021-12-22 11:47:56,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:47:56,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:47:56,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:47:56,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:47:56,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:47:56,792 INFO L87 Difference]: Start difference. First operand 41332 states and 63031 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:47:58,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:47:58,473 INFO L93 Difference]: Finished difference Result 58744 states and 90139 transitions. [2021-12-22 11:47:58,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:47:58,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-12-22 11:47:58,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:47:58,687 INFO L225 Difference]: With dead ends: 58744 [2021-12-22 11:47:58,688 INFO L226 Difference]: Without dead ends: 49082 [2021-12-22 11:47:58,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:47:58,710 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 418 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:47:58,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 864 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:47:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49082 states. [2021-12-22 11:48:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49082 to 47524. [2021-12-22 11:48:00,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47524 states, 47523 states have (on average 1.5279128001178377) internal successors, (72611), 47523 states have internal predecessors, (72611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:00,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47524 states to 47524 states and 72611 transitions. [2021-12-22 11:48:00,793 INFO L78 Accepts]: Start accepts. Automaton has 47524 states and 72611 transitions. Word has length 97 [2021-12-22 11:48:00,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:00,794 INFO L470 AbstractCegarLoop]: Abstraction has 47524 states and 72611 transitions. [2021-12-22 11:48:00,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:00,794 INFO L276 IsEmpty]: Start isEmpty. Operand 47524 states and 72611 transitions. [2021-12-22 11:48:00,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-22 11:48:00,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:00,801 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:00,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 11:48:00,801 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash 422142567, now seen corresponding path program 1 times [2021-12-22 11:48:00,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:00,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877215003] [2021-12-22 11:48:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:00,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:01,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 11:48:01,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:01,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877215003] [2021-12-22 11:48:01,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877215003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:01,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:01,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:48:01,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171153947] [2021-12-22 11:48:01,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:01,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:48:01,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:01,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:48:01,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:48:01,038 INFO L87 Difference]: Start difference. First operand 47524 states and 72611 transitions. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:06,126 INFO L93 Difference]: Finished difference Result 143925 states and 220205 transitions. [2021-12-22 11:48:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 11:48:06,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-22 11:48:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:06,328 INFO L225 Difference]: With dead ends: 143925 [2021-12-22 11:48:06,329 INFO L226 Difference]: Without dead ends: 116045 [2021-12-22 11:48:06,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-12-22 11:48:06,356 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 926 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:06,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 882 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:48:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116045 states. [2021-12-22 11:48:10,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116045 to 90054. [2021-12-22 11:48:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90054 states, 90053 states have (on average 1.5301655691648253) internal successors, (137796), 90053 states have internal predecessors, (137796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90054 states to 90054 states and 137796 transitions. [2021-12-22 11:48:10,962 INFO L78 Accepts]: Start accepts. Automaton has 90054 states and 137796 transitions. Word has length 98 [2021-12-22 11:48:10,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:10,964 INFO L470 AbstractCegarLoop]: Abstraction has 90054 states and 137796 transitions. [2021-12-22 11:48:10,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 90054 states and 137796 transitions. [2021-12-22 11:48:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-22 11:48:10,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:10,979 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:10,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 11:48:10,980 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1611093686, now seen corresponding path program 1 times [2021-12-22 11:48:10,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:10,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519798645] [2021-12-22 11:48:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:10,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:48:11,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:11,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519798645] [2021-12-22 11:48:11,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519798645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:11,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:11,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:48:11,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040107593] [2021-12-22 11:48:11,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:11,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:48:11,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:11,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:48:11,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:48:11,030 INFO L87 Difference]: Start difference. First operand 90054 states and 137796 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:16,349 INFO L93 Difference]: Finished difference Result 144467 states and 222371 transitions. [2021-12-22 11:48:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:48:16,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-22 11:48:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:16,564 INFO L225 Difference]: With dead ends: 144467 [2021-12-22 11:48:16,564 INFO L226 Difference]: Without dead ends: 116505 [2021-12-22 11:48:16,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:48:16,616 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 189 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:16,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 559 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:16,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116505 states. [2021-12-22 11:48:22,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116505 to 112687. [2021-12-22 11:48:22,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112687 states, 112686 states have (on average 1.5310686331931207) internal successors, (172530), 112686 states have internal predecessors, (172530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112687 states to 112687 states and 172530 transitions. [2021-12-22 11:48:22,527 INFO L78 Accepts]: Start accepts. Automaton has 112687 states and 172530 transitions. Word has length 98 [2021-12-22 11:48:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:48:22,528 INFO L470 AbstractCegarLoop]: Abstraction has 112687 states and 172530 transitions. [2021-12-22 11:48:22,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 112687 states and 172530 transitions. [2021-12-22 11:48:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-22 11:48:22,529 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:48:22,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:48:22,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 11:48:22,532 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:48:22,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:48:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1798382351, now seen corresponding path program 1 times [2021-12-22 11:48:22,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:48:22,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473668953] [2021-12-22 11:48:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:48:22,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:48:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:48:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:48:22,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:48:22,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473668953] [2021-12-22 11:48:22,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473668953] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:48:22,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:48:22,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:48:22,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60465600] [2021-12-22 11:48:22,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:48:22,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:48:22,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:48:22,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:48:22,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:48:22,593 INFO L87 Difference]: Start difference. First operand 112687 states and 172530 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:48:27,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:48:27,384 INFO L93 Difference]: Finished difference Result 203353 states and 311110 transitions. [2021-12-22 11:48:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:48:27,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-12-22 11:48:27,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:48:27,528 INFO L225 Difference]: With dead ends: 203353 [2021-12-22 11:48:27,528 INFO L226 Difference]: Without dead ends: 90739 [2021-12-22 11:48:27,593 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 [2021-12-22 11:48:27,594 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 73 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:48:27,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 401 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:48:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90739 states.